Professor Michael Charlton

Professor Emeritus (Science)

Physics

+44 (0) 1792 295372

m.charlton@swansea.ac.uk

Office - 508A
Fifth Floor
Vivian Building
Singleton Campus

About

I am an experimental atomic physicist, with interests in positrons, positronium and antihydrogen. I have made contributions to many aspects of the development of physics with low energy positrons and helped to establish positronium beam physics. Since the mid-1980’s I have pioneered the field of antihydrogen physics. I was a founder member of the ATHENA collaboration that first produced cold antihydrogen and later of the ALPHA collaboration. ALPHA has performed several experiments on antihydrogen, including spectroscopic measurements involving ground and excited states, thereby ushering in the era of precision physics with atomic antimatter.

Areas Of Expertise

Antihydrogen physics
Positron and positronium physics
Positron beams and accumulation and manipulation devices.
Low energy charged particle and gamma-ray detection techniques

Career Highlights

Award Highlights

Elected as a Member of the Academia Europaea (2020)
Elected as Vice President of the Learned Society of Wales for STEMM (2018)
Trapped Antihydrogen work from 2010 featured as one of the top 40 papers from the last 40 years in an anniversary celebration of the Department of Energy, USA (2017)
Elected to General Purpose and Finance Committees of the Learned Society of Wales (2017)
Chair of the Inaugural Dillwyn Medal Committee for the Learned Society of Wales (2016)
Antihydrogen work featured in “Pioneer 14”, the EPSRC 20-year celebration publication (2015)
Elected to the Council of the Learned Society of Wales (2014)
Co-recipient (with 10 colleagues from the ALPHA Collaboration) of the 2011 American Physical Society John Dawson Award for Excellence in Plasma Physics Research. Citation: “For the introduction and use of innovative plasma techniques which produced the first demonstration of the trapping of antihydrogen (2011)
Elected as an Inaugural Fellow of the Learned Society of Wales (FLSW) (2011)
ALPHA’s work on Trapped Antihydrogen selected by Physics World as 2010 physics highlight of the year (2010)
Awarded EPSRC Senior Research Fellowship (2007)
Antihydrogen work selected as an EPSRC highlight from their first 10 years (2005)
Elected to Fellowship of the Institute of Physics (FInstP) (2004)
Antihydrogen project selected as an EPSRC highlight (1996)
Positronium beam work selected as a SERC highlight (1988)
Awarded Royal Society University Research Fellowship (1983)
Awarded SERC Postdoctoral Fellowship (1982)

Collaborations

Publications

Research Highlights

Kadyrov, A., Rawlins, C., Charlton, M., Fabrikant, I., Bray, I., & Charlton, M. (2018). Antihydrogen formation in low-energy antiproton collisions with excited-state positronium atoms. Hyperfine Interactions, 239(1)
https://doi.org/10.1007/s10751-018-1519-x, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa44932
Jonsell, S., Charlton, M., & Charlton, M. (2018). On the formation of trappable antihydrogen. New Journal of Physics, 20(4), 043049
https://doi.org/10.1088/1367-2630/aabc71, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa39990
Jonsell, S., Charlton, M., van der Werf, D., & Charlton, M. (2017). The Role of Antihydrogen Formation in the Radial Transport of Antiprotons in Positron Plasmas. 12th International Conference on Low Energy Antiproton Physics (LEAP2016).
https://doi.org/10.7566/JPSCP.18.011011, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa39985
Charlton, M. (2017). Closing in on the properties of antihydrogen. The European Physical Journal D, 71(11)
https://doi.org/10.1140/epjd/e2017-80469-x, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37025
Kadyrov, A., Bray, I., Charlton, M., & Fabrikant, I. (2017). Quantum suppression of antihydrogen formation in positronium-antiproton scattering. Nature Communications, 8(1)
https://doi.org/10.1038/s41467-017-01721-y, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37024
Bianconi, A., Charlton, M., Lodi Rizzini, E., Mascagna, V., Venturelli, L., & Charlton, M. (2017). Antiparticle cloud temperatures for antihydrogen experiments. Physical Review A, 96(1)
https://doi.org/10.1103/PhysRevA.96.013418, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37021
Fabrikant, I., Kadyrov, A., Bray, I., Charlton, M., & Charlton, M. (2017). Low-energy l-mixing collisions of excited positronium with protons and antiprotons. Journal of Physics B: Atomic, Molecular and Optical Physics, 50(13), 134001
https://doi.org/10.1088/1361-6455/aa743c, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa34351
Rawlins, C., Kadyrov, A., Stelbovics, A., Bray, I., Charlton, M., & Charlton, M. (2016). Calculation of antihydrogen formation via antiproton scattering with excited positronium. Physical Review A, 93(1)
https://doi.org/10.1103/PhysRevA.93.012709, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa27052
Jonsell, S., Charlton, M., Werf, D., Charlton, M., & van der Werf, D. (2016). The role of antihydrogen formation in the radial transport of antiprotons in positron plasmas. Journal of Physics B: Atomic, Molecular and Optical Physics, 49(13), 134004
https://doi.org/10.1088/0953-4075/49/13/134004, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa30566
Charlton, M., Kadyrov, A., Bray, I., & Charlton, M. (2016). Heating due to momentum transfer in low-energy positronium-antiproton scattering. Physical Review A, 94(3)
https://doi.org/10.1103/PhysRevA.94.032701, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa30567

All Research

Journal Articles

Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Capra, A., Cohen, S., Torkzaban, C., Cesar, C., Charlton, M., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Granum, P., Hangst, J., Hayden, M...., & Collaboration), . (2024). Adiabatic expansion cooling of antihydrogen. Physical Review Research, 6(3)
https://doi.org/10.1103/physrevresearch.6.l032065, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa67727
Baker, C., Bertsche, W., Capra, A., Cesar, C., Charlton, M., Christensen, A., Collister, R., Cridland, A., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Grandemange, P., Granum, P., Hangst, J., Hayden, M...., & Collaboration), . (2024). Measurements of Penning-Malmberg trap patch potentials and associated performance degradation. Physical Review Research, 6(1)
https://doi.org/10.1103/physrevresearch.6.l012008, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa65508
Anderson, E., Baker, C., Bertsche, W., Bhatt, N., Bonomi, G., Capra, A., Carli, I., Cesar, C., Charlton, M., Christensen, A., Collister, R., Cridland, A., Quiceno, D., Eriksson, S., Evans, A., Evetts, N., Fabbri, S., Fajans, J., Ferwerda, A...., & Wurtele, J. (2023). Observation of the effect of gravity on the motion of antimatter. Nature, 621(7980), 716-722.
https://doi.org/10.1038/s41586-023-06527-1, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa64655
http://dx.doi.org/10.1038/s41586-023-06527-1
Baker, C., Bertsche, W., Capra, A., Cesar, C., Charlton, M., Christensen, A., Collister, R., Mathad, A., Eriksson, S., Evans, A., Evetts, N., Fabbri, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Grandemange, P., Granum, P., Hangst, J...., & Jones, J. (2023). Design and performance of a novel low energy multispecies beamline for an antihydrogen experiment. Physical Review Accelerators and Beams, 26(4)
https://doi.org/10.1103/physrevaccelbeams.26.040101, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa63230
http://dx.doi.org/10.1103/physrevaccelbeams.26.040101
Charlton, M., Ambalampitiya, H., Fabrikant, I., Kalinkin, I., Fursa, D., Kadyrov, A., & Bray, I. (2023). Antiproton collisions with excited positronium. Physical Review A, 107(1)
https://doi.org/10.1103/physreva.107.012814, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa62580
Blumer, P., Charlton, M., Chung, M., Cladé, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati, S., Hervieux, P., Hilico, L., Husson, A., Indelicato, P., Janka, G., Jonsell, S., Karr, J., Kim, B...., & Baker, C. (2022). Positron accumulation in the GBAR experiment. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1040, 167263
https://doi.org/10.1016/j.nima.2022.167263, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60681
Baker, C., Bertsche, W., Capra, A., Cesar, C., Charlton, M., Cridland, A., Eriksson, S., Evans, A., Evetts, N., Fabbri, S., Fajans, J., Friesen, T., Fujiwara, M., Grandemange, P., Granum, P., Hangst, J., Hayden, M., Hodgkinson, D., Isaac, A...., & Wurtele, J. (2021). Sympathetic cooling of positrons to cryogenic temperatures for antihydrogen production. Nature Communications, 12(1)
https://doi.org/10.1038/s41467-021-26086-1, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa58657
Madsen, N. & Charlton, M. (2021). On the formation of antihydrogen beams using travelling optical lattices. New Journal of Physics, 23(7), 073003
https://doi.org/10.1088/1367-2630/ac0b7b, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa57402
Husson, A., Kim, B., Welker, A., Charlton, M., Choi, J., Chung, M., Cladé, P., Comini, P., Crépin, P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati-Khélifa, S., Garroum, N., Hervieux, P., Hilico, L., Indelicato, P...., & Yoo, K. (2021). A pulsed high-voltage decelerator system to deliver low-energy antiprotons. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1002, 165245
https://doi.org/10.1016/j.nima.2021.165245, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa57076
Baker, C., Bertsche, W., Capra, A., Carruth, C., Cesar, C., Charlton, M., Christensen, A., Collister, R., Cridland, A., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Grandemange, P., Granum, P., Hangst, J...., & Charlton, M. (2021). Laser cooling of antihydrogen atoms. Nature, 592(7852), 35-42.
https://doi.org/10.1038/s41586-021-03289-6, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56625
Jonsell, S. & Charlton, M. (2021). On the binding energies of antihydrogen formed by the interactions of antiprotons in cold positron plasmas. Journal of Physics B: Atomic, Molecular and Optical Physics, 54(2), 025001
https://doi.org/10.1088/1361-6455/abcded, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa59237
Baker, C., Isaac, A., Edwards, D., Evans, H., Clayton, R., van der Werf, D., & Charlton, M. (2020). Investigation of buffer gas trapping of positrons. Journal of Physics B: Atomic, Molecular and Optical Physics, 53(18), 185201
https://doi.org/10.1088/1361-6455/aba10c, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa56642
Collaboration), ., Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Capra, A., Carruth, C., Cesar, C., Charlton, M., Cohen, S., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Granum, P...., & Wurtele, J. (2020). Investigation of the fine structure of antihydrogen. Nature, 578(7795), 375-380.
https://doi.org/10.1038/s41586-020-2006-5, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa53592
Niang, S., Charlton, M., Choi, J., Chung, M., Cladé, P., Comini, P., Crivelli, P., Crépin, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Froehlich, P., Gafriller, J., Guellati, S., Heinrich, J., Hervieux, P., Hilico, L., Husson, A...., & Baker, C. (2020). Accumulation of Positrons from a LINAC Based Source. Acta Physica Polonica A, 137(2), 164-166.
https://doi.org/10.12693/aphyspola.137.164, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa53875
Zammit, M., Charlton, M., Jonsell, S., Colgan, J., Savage, J., Fursa, D., Kadyrov, A., Bray, I., Forrey, R., Fontes, C., Leiding, J., Kilcrease, D., Hakel, P., & Timmermans, E. (2019). Laser-driven production of the antihydrogen molecular ion. Physical Review A, 100(4)
https://doi.org/10.1103/physreva.100.042709, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa52838
Kadyrov, A., Rawlins, C., Charlton, M., Fabrikant, I., Bray, I., & Charlton, M. (2018). Antihydrogen formation in low-energy antiproton collisions with excited-state positronium atoms. Hyperfine Interactions, 239(1)
https://doi.org/10.1007/s10751-018-1519-x, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa44932
Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Capra, A., Carruth, C., Cesar, C., Charlton, M., Cohen, S., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W...., & Wurtele, J. (2018). Observation of the 1S–2P Lyman-α transition in antihydrogen. Nature, 561(7722), 211-215.
https://doi.org/10.1038/s41586-018-0435-1, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa43610
Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Capra, A., Carruth, C., Cesar, C., Charlton, M., Cohen, S., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W...., & Wurtele, J. (2018). Characterization of the 1S–2S transition in antihydrogen. Nature, 557(7703), 71-75.
https://doi.org/10.1038/s41586-018-0017-2, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa39315
Jonsell, S., Charlton, M., & Charlton, M. (2018). On the formation of trappable antihydrogen. New Journal of Physics, 20(4), 043049
https://doi.org/10.1088/1367-2630/aabc71, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa39990
Isaac, A., Baker, C., Edwards, D., Isaac, C., Telle, H., van der Werf, D., Charlton, M., & Charlton, M. (2018). Excitation of positronium: from the ground state to Rydberg levels. Journal of Physics B: Atomic, Molecular and Optical Physics, 51
https://doi.org/10.1088/1361-6455/aa9aa2, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa36783
Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Capra, A., Carruth, C., Cesar, C., Charlton, M., Cohen, S., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W...., & Charlton, M. (2018). Enhanced Control and Reproducibility of Non-Neutral Plasmas. Physical Review Letters, 120(2)
https://doi.org/10.1103/physrevlett.120.025001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37994
Kadyrov, A., Bray, I., Charlton, M., & Fabrikant, I. (2017). Quantum suppression of antihydrogen formation in positronium-antiproton scattering. Nature Communications, 8(1)
https://doi.org/10.1038/s41467-017-01721-y, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37024
Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Butler, E., Capra, A., Carruth, C., Cesar, C., Charlton, M., Cohen, S., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A...., & Wurtele, J. (2017). Antihydrogen accumulation for fundamental symmetry tests. Nature Communications, 8(1)
https://doi.org/10.1038/s41467-017-00760-9, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa45319
Charlton, M. (2017). Closing in on the properties of antihydrogen. The European Physical Journal D, 71(11)
https://doi.org/10.1140/epjd/e2017-80469-x, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37025
Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Butler, E., Capra, A., Carruth, C., Cesar, C., Charlton, M., Cohen, S., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A...., & Eriksson, S. (2017). Observation of the hyperfine spectrum of antihydrogen. Nature, 548(7665), 66-69.
https://doi.org/10.1038/nature23446, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa45301
Bianconi, A., Charlton, M., Lodi Rizzini, E., Mascagna, V., Venturelli, L., & Charlton, M. (2017). Antiparticle cloud temperatures for antihydrogen experiments. Physical Review A, 96(1)
https://doi.org/10.1103/PhysRevA.96.013418, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37021
Fabrikant, I., Kadyrov, A., Bray, I., Charlton, M., & Charlton, M. (2017). Low-energy l-mixing collisions of excited positronium with protons and antiprotons. Journal of Physics B: Atomic, Molecular and Optical Physics, 50(13), 134001
https://doi.org/10.1088/1361-6455/aa743c, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa34351
Bertsche, W., Charlton, M., Eriksson, S., Charlton, M., & Eriksson, S. (2017). Cold neutral atoms via charge exchange from excited state positronium: a proposal. New Journal of Physics, 19(5), 053020
https://doi.org/10.1088/1367-2630/aa6bb8, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa32972
Capra, A., Amole, C., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Cesar, C., Charlton, M., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M., Isaac, C., Jonsell, S...., & Eriksson, S. (2016). Limit on the electric charge of antihydrogen. Hyperfine Interactions, 238(1)
https://doi.org/10.1007/s10751-016-1382-6, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa32963
Ahmadi, M., Alves, B., Baker, C., Bertsche, W., Butler, E., Capra, A., Carruth, C., Cesar, C., Charlton, M., Cohen, S., Collister, R., Eriksson, S., Evans, A., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A...., & Wurtele, J. (2016). Observation of the 1S–2S transition in trapped antihydrogen. Nature, 541(7638), 506-510.
https://doi.org/10.1038/nature21040, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa36784
Charlton, M., Kadyrov, A., Bray, I., & Charlton, M. (2016). Heating due to momentum transfer in low-energy positronium-antiproton scattering. Physical Review A, 94(3)
https://doi.org/10.1103/PhysRevA.94.032701, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa30567
Jonsell, S., Charlton, M., Werf, D., Charlton, M., & van der Werf, D. (2016). The role of antihydrogen formation in the radial transport of antiprotons in positron plasmas. Journal of Physics B: Atomic, Molecular and Optical Physics, 49(13), 134004
https://doi.org/10.1088/0953-4075/49/13/134004, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa30566
Ahmadi, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., Carruth, C., Cesar, C., Charman, A., Evans, L., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M., Ishida, A...., & Eriksson, S. (2016). An improved limit on the charge of antihydrogen from stochastic acceleration. Nature, 529(7586), 373-376.
https://doi.org/10.1038/nature16491, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa25943
Rawlins, C., Kadyrov, A., Stelbovics, A., Bray, I., Charlton, M., & Charlton, M. (2016). Calculation of antihydrogen formation via antiproton scattering with excited positronium. Physical Review A, 93(1)
https://doi.org/10.1103/PhysRevA.93.012709, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa27052
Charlton, M., van der Werf, D., & Charlton, M. (2015). Advances in antihydrogen physics. Science Progress, 98(1), 34-62.
https://doi.org/10.3184/003685015X14234978376369, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22137
Gutierrez, A., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Burrows, C., Butler, E., Capra, A., Cesar, C., Charlton, M., Dunlop, R., Eriksson, S., Evetts, N., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayden, M...., & Zhmoginov, A. (2015). Antiproton cloud compression in the ALPHA apparatus at CERN. Hyperfine Interactions, 235(1-3), 21-28.
https://doi.org/10.1007/s10751-015-1202-4, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa24055
Bertsche, W., Butler, E., Charlton, M., Madsen, N., Charlton, M., & Madsen, N. (2015). Physics with antihydrogen. Journal of Physics B: Atomic, Molecular and Optical Physics, 48(23), 232001
https://doi.org/10.1088/0953-4075/48/23/232001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa23608
http://iopscience.iop.org/article/10.1088/0953-4075/48/23/232001/meta
Deller, A., Edwards, D., Mortensen, T., Isaac, C., Werf, D., Telle, H., Charlton, M., Charlton, M., van der Werf, D., & Isaac, A. (2015). Exciting positronium with a solid-state UV laser: the Doppler-broadened Lyman-αtransition. Journal of Physics B: Atomic, Molecular and Optical Physics, 48(17), 175001
https://doi.org/10.1088/0953-4075/48/17/175001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22553
Kadyrov, A., Rawlins, C., Stelbovics, A., Bray, I., Charlton, M., & Charlton, M. (2015). Antihydrogen Formation via Antiproton Scattering with Excited Positronium. Physical Review Letters, 114(18)
https://doi.org/10.1103/PhysRevLett.114.183201, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22167
Keating, C., Charlton, M., Straton, J., & Charlton, M. (2014). On the production of the positive antihydrogen ion ${{{\rm \bar{H}}}^{+}}$ via radiative attachment. Journal of Physics B: Atomic, Molecular and Optical Physics, 47(22), 225202
https://doi.org/10.1088/0953-4075/47/22/225202, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22166
Deller, A., Mortensen, T., Isaac, C., P van der Werf, D., Charlton, M., Charlton, M., van der Werf, D., & Isaac, A. (2014). Radially selective inward transport of positrons in a Penning–Malmberg trap. New Journal of Physics, 16(7), 073028
https://doi.org/10.1088/1367-2630/16/7/073028, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa19832
Amole, C., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., Cesar, C., Charlton, M., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M., Isaac, C., Jonsell, S...., & Eriksson, S. (2014). An experimental limit on the charge of antihydrogen. Nature Communications, 5, 3955
https://doi.org/10.1038/ncomms4955, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa18032
http://www.nature.com/ncomms/2014/140603/ncomms4955/full/ncomms4955.html
Charlton, M., van der Werf, D., Madsen, N., Isaac, A., & Eriksson, S. (2014). In situelectromagnetic field diagnostics with an electron plasma in a Penning–Malmberg trap. New Journal of Physics, 16(1), 013037
https://doi.org/10.1088/1367-2630/16/1/013037, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa17396
Amole, C., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Capra, A., Carpenter, P., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Escallier, J., Fajans, J., Friesen, T., Fujiwara, M., Gill, D...., & Eriksson, S. (2014). The ALPHA antihydrogen trapping apparatus. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 735, 319-340.
https://doi.org/10.1016/j.nima.2013.09.043, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa18705
Amole, C., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Capra, A., Cesar, C., Charlton, M., Deller, A., Donnan, P., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W...., & Charlton, M. (2012). Resonant quantum transitions in trapped antihydrogen atoms. Nature, 483(7390)-443.
https://doi.org/10.1038/nature10942, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa8005
Barker, P., Charlton, M., & Charlton, M. (2012). Directed fluxes of positronium using pulsed travelling optical lattices. New Journal of Physics, 14(4), 045005
https://doi.org/10.1088/1367-2630/14/4/045005, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13857
Rizzini, E., Venturelli, L., Zurlo, N., Charlton, M., Amsler, C., Bonomi, G., Canali, C., Carraro, C., Fontana, A., Genova, P., Hayano, R., Jørgensen, L., Kellerbauer, A., Lagomarsino, V., Landua, R., Macrí, M., Manuzio, G., Montagna, P., Regenfus, C...., & van der Werf, D. (2012). Further evidence for low-energy protonium production in vacuum. The European Physical Journal Plus, 127(10)
https://doi.org/10.1140/epjp/i2012-12124-9, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13704
Werf, D., Isaac, C., Baker, C., Mortensen, T., Kerrigan, S., Charlton, M., Charlton, M., van der Werf, D., Baker, C., & Isaac, A. (2012). The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields. New Journal of Physics, 14(7), 075022
https://doi.org/10.1088/1367-2630/14/7/075022, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13706
Amole, C., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Capra, A., Cesar, C., Charlton, M., Deller, A., Donnan, P., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W...., & Eriksson, S. (2012). Resonant quantum transitions in trapped antihydrogen atoms. Nature, 483(7390), 439-443.
https://doi.org/10.1038/nature10942, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22120
Amole, C., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M...., & Eriksson, S. (2012). Discriminating between antihydrogen and mirror-trapped antiprotons in a minimum-B trap. New Journal of Physics, 14(1)
https://doi.org/10.1088/1367-2630/14/1/015010, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7669
Charlton, M., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A...., & Madsen, N. (2011). Antiparticle sources for antihydrogen production and trapping. Journal of Physics: Conference Series, 262
https://doi.org/10.1088/1742-6596/262/1/012001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7386
Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A...., & Madsen, N. (2011). Search for trapped antihydrogen. Physics Letters B, 695(1-4), 95-104.
https://doi.org/10.1016/j.physletb.2010.11.004, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7387
Colucci, M., Werf, D., Charlton, M., Charlton, M., & van der Werf, D. (2011). The temperature and density dependence of positron annihilation in CO2and SF6. Journal of Physics B: Atomic, Molecular and Optical Physics, 44(17)
https://doi.org/10.1088/0953-4075/44/17/175204, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7388
Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Cesar, C., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayano, R., Hayden, M...., & Eriksson, S. (2011). Confinement of antihydrogen for 1,000 seconds. Nature Physics, 7(7), 558-564.
https://doi.org/10.1038/nphys2025, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7392
Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Carpenter, P., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayden, M., Humphries, A., Hurt, J...., & Madsen, N. (2011). Autoresonant Excitation of Antiproton Plasmas. Physical Review Letters, 106(2), 025002
https://doi.org/10.1103/PhysRevLett.106.025002, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7398
Isaac, C., Baker, C., Mortensen, T., Werf, D., Charlton, M., Charlton, M., van der Werf, D., Baker, C., & Isaac, A. (2011). Compression of Positron Clouds in the Independent Particle Regime. Physical Review Letters, 107(3)
https://doi.org/10.1103/PhysRevLett.107.033201, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7404
Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M...., & Eriksson, S. (2011). Centrifugal Separation and Equilibration Dynamics in an Electron-Antiproton Plasma. Physical Review Letters, 106(14)
https://doi.org/10.1103/PhysRevLett.106.145001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7409
Butler, E., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Bray, C., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A...., & Madsen, N. (2011). Towards antihydrogen trapping and spectroscopy at ALPHA. Hyperfine Interactions, 199(1-3), 39-48.
https://doi.org/10.1007/s10751-011-0299-3, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa8003
Madsen, N., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayden, M., Humphries, A...., & Madsen, N. (2011). Search for trapped antihydrogen in ALPHA. Canadian Journal of Physics, 89(1), 7-16.
https://doi.org/10.1139/P10-085, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa8004
Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M...., & Eriksson, S. (2010). Trapped antihydrogen. Nature, 468(7324), 673-676.
https://doi.org/10.1038/nature09610, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1110
Knudsen, H., Torii, H., Charlton, M., Enomoto, Y., Georgescu, I., Hunniford, C., Kim, C., Kanai, Y., Kristiansen, H., Kuroda, N., Lund, M., McCullough, R., Tökesi, K., Uggerhøj, U., Yamazaki, Y., & Charlton, M. (2010). Target Structure Induced Suppression of the Ionization Cross Section for Very Low Energy Antiproton-Hydrogen Collisions. Physical Review Letters, 105(21)
https://doi.org/10.1103/PhysRevLett.105.213201, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1113
Werf, D., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M...., & Madsen, N. (2010). Antimatter transport processes. Journal of Physics: Conference Series, 257
https://doi.org/10.1088/1742-6596/257/1/012004, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7397
Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R...., & Madsen, N. (2010). Evaporative Cooling of Antiprotons to Cryogenic Temperatures. Physical Review Letters, 105(1)
https://doi.org/10.1103/PhysRevLett.105.013003, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7402
Jonsell, S., Werf, D., Charlton, M., Charlton, M., & van der Werf, D. (2010). Simulations of antihydrogen formation in a nested Penning trap. Journal of Physics: Conference Series, 199
https://doi.org/10.1088/1742-6596/199/1/012008, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7408
Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jørgensen, L., Kerrigan, S...., & Madsen, N. (2010). Antihydrogen formation dynamics in a multipolar neutral anti-atom trap. Physics Letters B, 685(2-3)-145.
https://doi.org/10.1016/j.physletb.2010.01.066, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7412
Werf, D., Baker, C., Beddows, D., Watkeys, P., Isaac, C., Kerrigan, S., Charlton, M., Telle, H., Telle, H., Charlton, M., van der Werf, D., Baker, C., & Isaac, A. (2010). Magnetised positronium. Journal of Physics: Conference Series, 199
https://doi.org/10.1088/1742-6596/199/1/012005, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7174
Andresen, G., Bertsche, W., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Gill, D., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jo̸rgensen, L., Kerrigan, S., Keller, J., Kurchaninov, L...., & Madsen, N. (2009). Magnetic multipole induced zero-rotation frequency bounce-resonant loss in a Penning–Malmberg trap used for antihydrogen trapping. Physics of Plasmas, 16(10)
https://doi.org/10.1063/1.3258840, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7389
Charlton, M. & Charlton, M. (2009). Positron transport in gases. Journal of Physics: Conference Series, 162
https://doi.org/10.1088/1742-6596/162/1/012003, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7391
Cesar, C., Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Funakoshi, R., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jenkins, M...., & Madsen, N. (2009). Antihydrogen Physics at ALPHA/CERNThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.. Canadian Journal of Physics, 87(7)-797.
https://doi.org/10.1139/P08-148, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7396
Jonsell, S., Werf, D., Charlton, M., Robicheaux, F., Charlton, M., & van der Werf, D. (2009). Simulation of the formation of antihydrogen in a nested Penning trap: effect of positron density. Journal of Physics B: Atomic, Molecular and Optical Physics, 42(21)
https://doi.org/10.1088/0953-4075/42/21/215002, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7401
Knudsen, H., Kristiansen, H., Thomsen, H., Uggerhøj, U., Ichioka, T., Møller, S., Hunniford, C., McCullough, R., Charlton, M., Kuroda, N., Nagata, Y., Torii, H., Yamazaki, Y., Imao, H., Andersen, H., Tökesi, K., & Charlton, M. (2009). On the double ionization of helium by very slow antiproton impact. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 267(2)-247.
https://doi.org/10.1016/j.nimb.2008.10.070, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7403
Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jo̸rgensen, L., Kerrigan, S...., & Madsen, N. (2009). Antiproton, positron, and electron imaging with a microchannel plate/phosphor detector. Review of Scientific Instruments, 80(12)
https://doi.org/10.1063/1.3266967, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7407
Andresen, G., Bertsche, W., Boston, A., Bowe, P., Cesar, C., Chapman, S., Charlton, M., Chartier, M., Deutsch, A., Fajans, J., Fujiwara, M., Funakoshi, R., Gill, D., Gomberoff, K., Hangst, J., Hayano, R., Hydomako, R., Jenkins, M., Jørgensen, L...., & Madsen, N. (2008). Production of antihydrogen at reduced magnetic field for anti-atom trapping. Journal of Physics B: Atomic, Molecular and Optical Physics, 41(1), 011001
https://doi.org/10.1088/0953-4075/41/1/011001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1111
Knudsen, H., Kristiansen, H., Thomsen, H., Uggerhøj, U., Ichioka, T., Møller, S., Hunniford, C., McCullough, R., Charlton, M., Kuroda, N., Nagata, Y., Torii, H., Yamazaki, Y., Imao, H., Andersen, H., Tökesi, K., & Charlton, M. (2008). Ionization of Helium and Argon by Very Slow Antiproton Impact. Physical Review Letters, 101(4)
https://doi.org/10.1103/PhysRevLett.101.043201, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1112
Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Funakoshi, R., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jenkins, M...., & Madsen, N. (2008). A novel antiproton radial diagnostic based on octupole induced ballistic loss. Physics of Plasmas, 15(3)
https://doi.org/10.1063/1.2899305, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7393
Jørgensen, L., Andresen, G., Bertsche, W., Boston, A., Bowe, P., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Funakoshi, R., Gill, D., Hangst, J., Hayano, R., Hydomako, R., Jenkins, M., Kurchaninov, L., Madsen, N., Nolan, P...., & Madsen, N. (2008). Towards trapped antihydrogen. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 266(3)-362.
https://doi.org/10.1016/j.nimb.2007.12.009, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7395
Charlton, M., Jonsell, S., Jørgensen, L., Madsen, N., Werf, D., Charlton, M., van der Werf, D., & Madsen, N. (2008). Antihydrogen for precision tests in physics. Contemporary Physics, 49(1)-41.
https://doi.org/10.1080/00107510802038448, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7399
Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Funakoshi, R., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Hydomako, R., Jenkins, M., Jørgensen, L...., & Madsen, N. (2008). Compression of Antiproton Clouds for Antihydrogen Trapping. Physical Review Letters, 100(20)
https://doi.org/10.1103/PhysRevLett.100.203401, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7405
Fujiwara, M., Amoretti, M., Amsler, C., Bonomi, G., Bouchta, A., Bowe, P., Canali, C., Carraro, C., Cesar, C., Charlton, M., Doser, M., Fontana, A., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Jørgensen, L., Kellerbauer, A., Lagomarsino, V...., & Madsen, N. (2008). Temporally Controlled Modulation of Antihydrogen Production and the Temperature Scaling of Antiproton-Positron Recombination. Physical Review Letters, 101(5)
https://doi.org/10.1103/PhysRevLett.101.053401, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7410
Baker, C., Werf, D., Beddows, D., Watkeys, P., Isaac, C., Kerrigan, S., Charlton, M., Telle, H., Telle, H., Charlton, M., van der Werf, D., Baker, C., & Isaac, A. (2008). Weakly bound positron–electron pairs in a strong magnetic field. Journal of Physics B: Atomic, Molecular and Optical Physics, 41(24)
https://doi.org/10.1088/0953-4075/41/24/245003, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7173
Zurlo, N., Amoretti, M., Amsler, C., Bonomi, G., Carraro, C., Cesar, C., Charlton, M., Doser, M., Fontana, A., Funakoshi, R., Genova, P., Hayano, R., Jørgensen, L., Kellerbauer, A., Lagomarsino, V., Landua, R., Rizzini, E., Macr��, M., Madsen, N...., & van der Werf, D. (2006). Evidence For The Production Of Slow Antiprotonic Hydrogen In Vacuum. Physical Review Letters, 97(15), 4 pages
https://doi.org/10.1103/PhysRevLett.97.153401, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1554
Amoretti, M., Amsler, C., Bonomi, G., Bouchta, A., Bowe, P., Carraro, C., Cesar, C., Charlton, M., Doser, M., Filippini, V., Fontana, A., Fujiwara, M., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Jørgensen, L., Kellerbauer, A., Lagomarsino, V...., & van der Werf, D. (2004). Dynamics of antiproton cooling in a positron plasma during antihydrogen formation. Physics Letters B, 590(3-4), 133-142.
https://doi.org/10.1016/j.physletb.2004.03.073, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1553
Madsen, N., Amoretti, M., Amsler, C., Bonomi, G., Bouchta, A., Bowe, P., Carraro, C., Cesar, C., Charlton, M., Doser, M., Filippini, V., Fontana, A., Fujiwara, M., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Jørgensen, L., Lagomarsino, V...., & van der Werf, D. (2003). Positron Plasma Diagnostics and Temperature Control for Antihydrogen Production. Physical Review Letters, 91(5), 5 pages
https://doi.org/10.1103/PhysRevLett.91.055001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1552

Authored Books

Charlton, M., Eriksson, S., & Shore, G. (2020). Antihydrogen and Fundamental Physics Springer International Publishing.
https://doi.org/10.1007/978-3-030-51713-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa54802
http://dx.doi.org/10.1007/978-3-030-51713-7

Conference Contributions

Jonsell, S., Charlton, M., van der Werf, D., & Charlton, M. (2017). The Role of Antihydrogen Formation in the Radial Transport of Antiprotons in Positron Plasmas. 12th International Conference on Low Energy Antiproton Physics (LEAP2016).
https://doi.org/10.7566/JPSCP.18.011011, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa39985
Bertsche, W., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bowe, P., Carpenter, P., Butler, E., Cesar, C., Chapman, S., Charlton, M., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayano, R...., & Charlton, M. (2012). Antihydrogen formation by autoresonant excitation of antiproton plasmas. In Hyperfine Interactions (pp. 61-67).
https://doi.org/10.1007/s10751-011-0383-8, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13861
Friesen, T., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Cesar, C., Chapman, S., Charlton, M., Eriksson, S., Fajans, J., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayano, R., Hayden, M...., & Charlton, M. (2012). Microwave-plasma interactions studied via mode diagnostics in ALPHA. In Hyperfine Interactions (pp. 117-123).
https://doi.org/10.1007/s10751-012-0585-8, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13862
Hydomako, R., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Bowe, P., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A...., & Yamazaki, Y. (2012). Antihydrogen detection in ALPHA. In Hyperfine Interactions (pp. 91-99).
https://doi.org/10.1007/s10751-011-0456-8, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13863
Ashkezari, M., Andresen, G., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayano, R...., & Yamazaki, Y. (2012). Progress towards microwave spectroscopy of trapped antihydrogen. In Hyperfine Interactions (pp. 81-90).
https://doi.org/10.1007/s10751-011-0449-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13864
Butler, E., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M...., & Charlton, M. (2012). Trapped antihydrogen. In Hyperfine Interactions (pp. 15-29).
https://doi.org/10.1007/s10751-011-0396-3, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13865
Werf, D., Isaac, C., Baker, C., Mortensen, T., & Charlton, M. (2012). Compression of positron clouds using rotating wall electric fields. In Hyperfine Interactions (pp. 125-132).
https://doi.org/10.1007/s10751-011-0384-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13866
Amole, C., Ashkezari, M., Andresen, G., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W...., & Charlton, M. (2012). Alternative method for reconstruction of antihydrogen annihilation vertices. In Hyperfine Interactions (pp. 101-107).
https://doi.org/10.1007/s10751-012-0588-5, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13867
Charlton, M., Andresen, G., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Carpenter, P., Cesar, C., Chapman, S., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayano, R...., & Eriksson, S. (2012). Antiparticle plasmas for antihydrogen trapping. (pp. 7-16).
https://doi.org/10.1063/1.4707848, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa12767
Fujiwara, M., Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Funakoshi, R., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jenkins, M...., & Madsen, N. (2008). Particle Physics Aspects of Antihydrogen Studies with ALPHA at CERN. -220).
https://doi.org/10.1063/1.2977840, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7400
Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Funakoshi, R., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jenkins, M...., & Madsen, N. (2008). First Attempts at Antihydrogen Trapping in ALPHA. -248).
https://doi.org/10.1063/1.2977843, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7406
Andresen, G., Bertsche, W., Bowe, P., Bray, C., Butler, E., Cesar, C., Chapman, S., Charlton, M., Fajans, J., Fujiwara, M., Funakoshi, R., Gill, D., Hangst, J., Hardy, W., Hayano, R., Hayden, M., Humphries, A., Hydomako, R., Jenkins, M...., & Madsen, N. (2008). Antiproton compression and radial measurements. -105).
https://doi.org/10.1063/1.2977860, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7411

Key Grants and Projects

Towards precision experiments with antihydrogen 2017 - 2021

EP/P024734/1 (PI), with SJ Eriksson, CA Isaac, N Madsen and DP van der Werf, £2.23M
Physics with trapped antihydrogen 2014 - 2017

EP/L014718/1 (PI), with SJ Eriksson, N Madsen and DP van der Werf, £590k
Analysis of the ATHENA data 2010 - 2012

Royal Society Joint Project Award, £10.5k
Swansea University: Bringing people together 2010 - 2013

EP/I00145X/1 (CoI), with H Thimbleby (PI), T Murray, H Fulton, V Roeben, HV Bowen, R Williams and JV Tucker, £790k
Ionization of atomic hydrogen by low energy antiprotons 2010 - 2011

EP/I005692/1 (Travel grant), £2.48k
The spectroscopy of antihydrogen 2010 - 2014

EP/H026932/1 (PI), with HH Telle, SJ Eriksson, N Madsen and DP van der Werf, £1.98M
Ionization of atomic hydrogen by low energy antiprotons 2009 - 2010

EP/G068968/1 (Travel grant), £2.56k
Ionization of atomic hydrogen and helium by low energy antiprotons 2007 - 2008

EP/F033885/1 (Travel grant), £1.66k
Antihydrogen physics 2007 - 2012

EP/E048951/1 (Senior Fellowship), £657k
Ionization of atomic hydrogen and helium by low energy antiprotons 2006 - 2007

EP/E016332/1 (Travel grant), £9.50k
Trapped antihydrogen - towards spectroscopy 2006 - 2010

EP/D038707/1 (PI), with HH Telle, LV Joergensen and DP van der Werf, £787k
Experiments on the internal quantum states of antihydrogen 2003 - 2005

GR/S71712/01 (PI), with HH Telle, LV Joergensen and DP van der Werf, £454k
Ionization of atomic hydrogen and helium by low energy antiprotons 2003 - 2005

GR/S22202/01 (Travel grant), £2.05k
The manipulation of Ps: laser interactions and magnetised Rydberg states 2002 - 2006

GR/R81451/01 (PI), with HH Telle, £633k
Production of cold antihydrogen 2000 - 2003

GR/N65240/01, £625k
A positron accumulator for the production of low energy antihydrogen 1999 - 2000

GR/L63266/02, £68.7k
A positron accumulator for the production of low energy antihydrogen 1998 - 1999

GR/L63266/01, £359k
Interim support for the production of antihydrogen at low temperatures 1995 - 1996

GR/L14251/01 (Travel grant), £9.64k
Use of cold trapped antiprotons for antihydrogen formation 1994 - 1994

GR/K30827/01 (Travel grant), £1.76k

Career History

Professor of Physics, Swansea University

1999 - Present
Reader in Physics, University College London

1990 - Present
Royal Society University Research Fellow, University College London

1983 - Present
SERC Junior Research Fellow, University College London

1982 - Present
Postdoctoral Research Assistant, University College London

1980 - Present

Other Roles

Vice President, Learned Society of Wales

2018 - Present

Public Engagements

I have undertaken significant outreach over the years. Prominent examples include:

Royal Society Summer Science Exhibition, July 2016: member of the “Antimatter Matters” team

CERN Open Weekend (2 talks), September 2013: “Antimatter” (http://www.youtube.com/playlist?list=PLAk-9e5KQYEp1K0f5IA_6TqiwYlmedO2o)

Times Cheltenham Science Festival, June 2013: “Particle Physics: An Introduction” co-presented with Dr Tom Whyntie

AAAS Meeting, Boston, USA, February 2013: “Resonant Quantum Transitions in Trapped Antihydrogen”

Cardiff Science Festival, July 2012: “Does Antimatter Matter”

IOP Irish Tour (UC Cork, NUI Galway, Dublin City University), March 2010: “Antimatter- From Imagination to Application – and Back”

Invited Presentations, Lectures and Conferences

2019 Massey Lecture: Physics with Low Energy Antimatter – from Gaseous Positronics to CERN

2019

University College London
4 lectures to the Fudan University Physics Summer School: Antimatter at Low Energies

2016

Fudan University, China
Rutherford Laboratory Lecture: Antimatter – from Imagination to Application

2014

Rutherford Appleton Laboratory
Director’s Colloquium: Antimatter in the Universe

2011

ANU, Canberra
36th Rochester Lecture at the invitation of Durham University: Antimatter – from Imagination to Application and Back

2010

Durham University
3 lectures to the 174th Enrico Fermi Summer School on “Physics with Many Positrons” Varenna, Italy: “Antihydrogen Physics”

2009

Varenna, Italy
38th Larmor Lecture at the invitation of Queen’s University Belfast: “Antimatter in the Universe”

2007

Queen’s University Belfast
Rutherford Laboratory Lecture: “Creation of Cold Antihydrogen”

2006

Rutherford Appleton Laboratory

Professor Michael Charlton

Telephone number

Email address

About

Areas Of Expertise

Career Highlights

Research Highlights

All Research

Towards precision experiments with antihydrogen 2017 - 2021

Physics with trapped antihydrogen 2014 - 2017

Analysis of the ATHENA data 2010 - 2012

Swansea University: Bringing people together 2010 - 2013

Ionization of atomic hydrogen by low energy antiprotons 2010 - 2011

The spectroscopy of antihydrogen 2010 - 2014

Ionization of atomic hydrogen by low energy antiprotons 2009 - 2010

Ionization of atomic hydrogen and helium by low energy antiprotons 2007 - 2008

Antihydrogen physics 2007 - 2012

Ionization of atomic hydrogen and helium by low energy antiprotons 2006 - 2007

Trapped antihydrogen - towards spectroscopy 2006 - 2010

Experiments on the internal quantum states of antihydrogen 2003 - 2005

Ionization of atomic hydrogen and helium by low energy antiprotons 2003 - 2005

The manipulation of Ps: laser interactions and magnetised Rydberg states 2002 - 2006

Production of cold antihydrogen 2000 - 2003

A positron accumulator for the production of low energy antihydrogen 1999 - 2000

A positron accumulator for the production of low energy antihydrogen 1998 - 1999

Interim support for the production of antihydrogen at low temperatures 1995 - 1996

Use of cold trapped antiprotons for antihydrogen formation 1994 - 1994

Professor of Physics, Swansea University

Reader in Physics, University College London

Royal Society University Research Fellow, University College London

SERC Junior Research Fellow, University College London

Postdoctoral Research Assistant, University College London

Vice President, Learned Society of Wales

2019 Massey Lecture: Physics with Low Energy Antimatter – from Gaseous Positronics to CERN

4 lectures to the Fudan University Physics Summer School: Antimatter at Low Energies

Rutherford Laboratory Lecture: Antimatter – from Imagination to Application

Director’s Colloquium: Antimatter in the Universe

36th Rochester Lecture at the invitation of Durham University: Antimatter – from Imagination to Application and Back

3 lectures to the 174th Enrico Fermi Summer School on “Physics with Many Positrons” Varenna, Italy: “Antihydrogen Physics”

38th Larmor Lecture at the invitation of Queen’s University Belfast: “Antimatter in the Universe”

Rutherford Laboratory Lecture: “Creation of Cold Antihydrogen”