Professor Niels Madsen

Personal Chair

Physics

+44 (0) 1792 602652

n.madsen@swansea.ac.uk

Office - 503
Fifth Floor
Vivian Building
Singleton Campus

Available For Postgraduate Supervision

Research Links

https://orcid.org/0000-0002-7372-0784

ResearcherID

About

At Swansea University since 2005, Professor Madsen is an experimental physicist who specializes in work on fundamental physics with antimatter. He is co-founder and group leader in the ALPHA collaboration that was the first group to trap antihydrogen and observe the first quantum transitions in it and is pursuing precision comparisons with hydrogen.

He has been actively involved in antihydrogen research since 2001, playing a substantial role in the ATHENA team that first formed low energy antihydrogen in 2002. He has a research group at CERN. His group plays a leading role in the ALPHA experiment, and led the effort to implement several key techniques leading to the first antihydrogen trapping and spectroscopy. For this work he has been awarded a Royal Society Senior Leverhulme Fellowship in 2010, and the 2011 James Dawson award for Excellence in Plasma Physics Research and a fellow of the American Physical Society in 2015.

Areas Of Expertise

Antihydrogen
Non-neutral plasmas
Atomic physics
Laser cooling
Spectroscopy
Accelerator physics
Trapped charged particles

Career Highlights

Award Highlights

John Dawson Award for Excellence in Plasma Physics Research (2011)

Fellow of the American Physical Society (2015)

Collaborations

Publications

Research Highlights

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
Madsen, N. (2020). Exotic helium atom lit up. Nature, 581(7806), 32-33.
https://doi.org/10.1038/d41586-020-01250-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60573
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
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., 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
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

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
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
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
Madsen, N. (2020). Exotic helium atom lit up. Nature, 581(7806), 32-33.
https://doi.org/10.1038/d41586-020-01250-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa60573
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
Sameed, M., Maxwell, D., & Madsen, N. (2020). Ion generation and loading of a Penning trap using pulsed laser ablation. New Journal of Physics, 22(1), 013009
https://doi.org/10.1088/1367-2630/ab6066, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa53255
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
Rasmussen, C., Madsen, N., Robicheaux, F., & Madsen, N. (2018). Corrigendum: Aspects of 1S–2S spectroscopy of trapped antihydrogen atoms (2017 J. Phys. B: At. Mol. Opt. Phys. Biofabrication 50 184002). Journal of Physics B: Atomic, Molecular and Optical Physics, 51(9), 099501
https://doi.org/10.1088/1361-6455/aab1a9, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa39316
http://iopscience.iop.org/article/10.1088/1361-6455/aab1a9
Madsen, N. & Madsen, N. (2018). Antiproton physics in the ELENA era. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376(2116), 20170278
https://doi.org/10.1098/rsta.2017.0278, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa37581
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
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
Rasmussen, C., Madsen, N., Robicheaux, F., & Madsen, N. (2017). Aspects of 1S-2S spectroscopy of trapped antihydrogen atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 50(18), 184002
https://doi.org/10.1088/1361-6455/aa854c, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa35078
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
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
Madsen, N. & Madsen, N. (2016). Antihydrogen studies in ALPHA. Journal of Physics: Conference Series, 770, 012021
https://doi.org/10.1088/1742-6596/770/1/012021, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa31511
http://iopscience.iop.org/article/10.1088/1742-6596/770/1/012021
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
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
Madsen, N., Robicheaux, F., Jonsell, S., & Madsen, N. (2014). Antihydrogen trapping assisted by sympathetically cooled positrons. New Journal of Physics, 16(6), 063046
https://doi.org/10.1088/1367-2630/16/6/063046, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa18049
http://iopscience.iop.org/1367-2630/16/6/063046/
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
Madsen, N. (2014). ALPHA: antihydrogen and fundamental physics. Hyperfine Interactions
https://doi.org/10.1007/s10751-014-1031-x, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa18547
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
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., Burrows, C., Butler, E., Capra, A., Cesar, C., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J...., & Eriksson, S. (2013). Silicon vertex detector upgrade in the ALPHA experiment. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 732, 134-136.
https://doi.org/10.1016/j.nima.2013.05.188, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa17394
Madsen, N. & Madsen, N. (2013). Trapped antihydrogen: A new frontier in fundamental physics. Journal of Physics: Conference Series, 443, 012005
https://doi.org/10.1088/1742-6596/443/1/012005, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15086
Amole, C., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., Cesar, C., Chapman, S., Charlton, M., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M., Isaac, C...., & Eriksson, S. (2013). Autoresonant-spectrometric determination of the residual gas composition in the ALPHA experiment apparatus. Review of Scientific Instruments, 84(6), 065110
https://doi.org/10.1063/1.4811527, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22128
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. (2013). Description and first application of a new technique to measure the gravitational mass of antihydrogen. Nature Communications, 4
https://doi.org/10.1038/ncomms2787, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa14766
Amole, C., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., Cesar, C., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W., Hayden, M., Isaac, C...., & Eriksson, S. (2013). Experimental and computational study of the injection of antiprotons into a positron plasma for antihydrogen production. Physics of Plasmas, 20(4), 043510
https://doi.org/10.1063/1.4801067, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa22125
Charlton, M., Eriksson, S., Isaac, C., Madsen, N., Werf, D., van der Werf, D., & Isaac, A. (2013). Antihydrogen in a bottle. Physics Education, 48(2)-220.
https://doi.org/10.1088/0031-9120/48/2/212, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa14475
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...., & Eriksson, S. (2012). Antihydrogen formation by autoresonant excitation of antiproton plasmas. Hyperfine Interactions, 212(1-3)-67.
https://doi.org/10.1007/s10751-011-0383-8, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa12762
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...., & van der Werf, D. (2012). Progress towards microwave spectroscopy of trapped antihydrogen. Hyperfine Interactions, 212(1-3)-90.
https://doi.org/10.1007/s10751-011-0449-7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa12763
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...., & Eriksson, S. (2012). Microwave-plasma interactions studied via mode diagnostics in ALPHA. Hyperfine Interactions, 212(1-3)-123.
https://doi.org/10.1007/s10751-012-0585-8, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa12764
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...., & Eriksson, S. (2012). Alternative method for reconstruction of antihydrogen annihilation vertices. Hyperfine Interactions, 212(1-3)-107.
https://doi.org/10.1007/s10751-012-0588-5, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa12765
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...., & Eriksson, S. (2012). Trapped antihydrogen. Hyperfine Interactions, 212(1-3), 15-29.
https://doi.org/10.1007/s10751-011-0396-3, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13700
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...., & van der Werf, D. (2012). Antihydrogen detection in ALPHA. Hyperfine Interactions, 212(1-3), 91-99.
https://doi.org/10.1007/s10751-011-0456-8, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa13701
Andresen, G., Ashkezari, 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., Hayano, R...., & Eriksson, S. (2012). Antihydrogen annihilation reconstruction with the ALPHA silicon detector. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 684, 73-81.
https://doi.org/10.1016/j.nima.2012.04.082, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa12768
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
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. (2012). The ALPHA – detector: Module Production and Assembly. Journal of Instrumentation, 7(01), C01051-C01051.
https://doi.org/10.1088/1748-0221/7/01/C01051, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa12761
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
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
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
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/cronfa7648
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)-48.
https://doi.org/10.1007/s10751-011-0299-3, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7658
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
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
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
Madsen, N. & Madsen, N. (2010). Cold antihydrogen: a new frontier in fundamental physics. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 368(1924)-3682.
https://doi.org/10.1098/rsta.2010.0026, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7668
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
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
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., 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
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
Fajans, J., Madsen, N., Robicheaux, F., & Madsen, N. (2008). Critical loss radius in a Penning trap subject to multipole fields. Physics of Plasmas, 15(3)
https://doi.org/10.1063/1.2899306, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7653
Madsen, N., 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...., & van der Werf, D. (2007). Antimatter Plasmas in a Multipole Trap for Antihydrogen. Physical Review Letters, 98(2)
https://doi.org/10.1103/PhysRevLett.98.023402, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1558
Amoretti, M., Amsler, C., Bonomi, G., Bowe, P., Canali, C., Carraro, C., Cesar, C., Charlton, M., Ejsing, A., Fontana, A., Fujiwara, M., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Jørgensen, L., Kellerbauer, A., Lagomarsino, V., Rizzini, E...., & Madsen, N. (2006). Search for Laser-Induced Formation of Antihydrogen Atoms. Physical Review Letters, 97(21), 4 pages
https://doi.org/10.1103/PhysRevLett.97.213401, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1582
Madsen, N., Amoretti, M., Amsler, C., Bonomi, G., Bowe, P., Carraro, C., Cesar, C., Charlton, M., Doser, M., Fontana, A., Fujiwara, M., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Jørgensen, L., Kellerbauer, A., Lagomarsino, V., Landua, R...., & Madsen, N. (2005). Spatial Distribution of Cold Antihydrogen Formation. Physical Review Letters, 94(3), 4 pages
https://doi.org/10.1103/PhysRevLett.94.033403, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1581
Fujiwara, M., Amoretti, M., Bonomi, G., Bouchta, A., Bowe, P., Carraro, C., Cesar, C., Charlton, M., Doser, M., Filippini, V., Fontana, A., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Jørgensen, L., Lagomarsino, V., Landua, R., Lodi-Rizzini, E...., & Madsen, N. (2004). Three-Dimensional Annihilation Imaging of Trapped Antiprotons. Physical Review Letters, 92(6)
https://doi.org/10.1103/PhysRevLett.92.065005, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1580
Amoretti, M., Amsler, C., Bazzano, G., Bonomi, G., Bouchta, A., Bowe, P., Canali, C., Carraro, C., Cesar, C., Charlton, M., Doser, M., Fontana, A., Fujiwara, M., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Johnson, I., Jørgensen, L...., & Madsen, N. (2004). Antihydrogen production temperature dependence. Physics Letters B, 583(1-2), 59-67.
https://doi.org/10.1016/j.physletb.2004.01.009, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa1579
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
Amoretti, M., Amsler, C., Bonomi, G., Bouchta, A., Bowe, P., Carraro, C., Cesar, C., Charlton, M., Collier, M., Doser, M., Filippini, V., Fine, K., Fontana, A., Fujiwara, M., Funakoshi, R., Genova, P., Hangst, J., Hayano, R., Holzscheiter, M...., & Madsen, N. (2002). Production and detection of cold antihydrogen atoms. Nature, 419(6906), 456-459.
https://doi.org/10.1038/nature01096, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15105
Madsen, N., Bowe, P., Drewsen, M., Hornekær, L., Kjærgaard, N., Labrador, A., Nielsen, J., Schiffer, J., Shi, P., & Hangst, J. (1999). Density Limitations in a Stored Laser-Cooled Ion Beam. Physical Review Letters, 83(21), 4301-4304.
https://doi.org/10.1103/physrevlett.83.4301, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa57401

Book Chapters

Madsen, N. (2016). ANTIHYDROGEN PHYSICS. Trapped Charged Particles -298). World Scientific
https://doi.org/10.1142/9781786340139_0014, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa31736
http://www.worldscientific.com/doi/pdf/10.1142/9781786340139_0014
Madsen, N. (2014). Antimatter Pushing Boundaries. From Physics to Daily Life: Applications in Informatics, Energy, and Environment (pp. 159-169). Wiley
https://doi.org/10.1002/9783527687039, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa18532
http://eu.wiley.com/WileyCDA/WileyTitle/productCd-3527332863.html
Thompson, R., Knoop, M., & Madsen, N. (2014). Chapter 1: Physics with Trapped Charged Particles. Physics with Trapped Charged Particles -24). Imperial College Press
https://doi.org/10.1142/9781783264063_0001, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa17822
Madsen, N. (2014). Chapter 8: Antihydrogen Formation and Trapping. Physics with Trapped Charged Particles -238). Imperial College Press
https://doi.org/10.1142/9781783264063_0008, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa17823

Conference Contributions

Silveira, D., 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., Hayden, M., Hydomako, R., Jonsell, S...., & Madsen, N. (2013). Evaporative cooling of antiprotons for the production of trappable antihydrogen. In AIP Conference Proceedings (pp. 165-174).
https://doi.org/10.1063/1.4796072, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa14622
Friesen, T., Amole, C., Ashkezari, M., Baquero-Ruiz, M., Bertsche, W., Bowe, P., Butler, E., Capra, A., Cesar, C., Charlton, M., Deller, A., Evetts, N., Eriksson, S., Fajans, J., Fujiwara, M., Gill, D., Gutierrez, A., Hangst, J., Hardy, W...., & Eriksson, S. (2013). Electron plasmas as a diagnostic tool for hyperfine spectroscopy of antihydrogen. In AIP Conference Proceedings (pp. 123-133).
https://doi.org/10.1063/1.4796068, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa14623
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...., & Madsen, N. (2013). Microwave-plasma interactions studied via mode diagnostics in ALPHA. In LEAP 2011 (pp. 117-123). Springer.
https://doi.org/10.1007/978-94-007-5530-7_13, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15087
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...., & Madsen, N. (2013). Alternative method for reconstruction of antihydrogen annihilation vertices. In LEAP 2011 (pp. 101-107). Springer.
https://doi.org/10.1007/978-94-007-5530-7_11, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15088
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. (2013). Antihydrogen detection in ALPHA. In LEAP 2011 (pp. 91-99).
https://doi.org/10.1007/978-94-007-5530-7_10, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15089
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. (2013). Progress towards microwave spectroscopy of trapped antihydrogen. In LEAP 2011 (pp. 81-90). Springer.
https://doi.org/10.1007/978-94-007-5530-7_9, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15090
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...., & Madsen, N. (2013). Antihydrogen formation by autoresonant excitation of antiproton plasmas. In LEAP 2011 (pp. 61-67). Springer.
https://doi.org/10.1007/978-94-007-5530-7_7, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15091
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...., & Madsen, N. (2013). Trapped antihydrogen. In LEAP 2011 (pp. 15-29). Springer.
https://doi.org/10.1007/978-94-007-5530-7_3, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15092
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., ASHKEZARI, M., BAQUERO-RUIZ, M., BERTSCHE, W., BRAY, C., BUTLER, E., CESAR, C., CHAPMAN, S., CHARLTON, M., CESAR, C., FAJANS, J., FRIESEN, T., GILL, D., HANGST, J., HARDY, W., HAYANO, R., HAYDEN, M., HUMPHRIES, A...., & Madsen, N. (2011). ALPHA ANTIHYDROGEN EXPERIMENT. In CPT AND Lorentz Symmetry. (pp. 50-54). World Scientific Publishing Co..
https://doi.org/10.1142/9789814327688_0011, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa15102
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
MADSEN, N., ANDRESEN, G., BERTSCHE, W., BOSTON, A., BOWE, P., BUTLER, E., CESAR, C., CHAPMAN, S., CHARLTON, M., CHARTIER, M., FAJANS, J., FUNAKOSHI, R., GILL, D., HANGST, J., HARDY, W., HAYANO, R., HAYDEN, M., HYDOMAKO, R., JENKINS, M...., & Madsen, N. (2008). THE ALPHA ANTIHYDROGEN EXPERIMENT. (pp. 143-149).
https://doi.org/10.1142/9789812779519_0021, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa7647

Edited Books

Knoop, M., Madsen, N., & Thompson, R. (Eds.). (2016). Trapped Charged Particles - A Graduate Textbook with Problems and Solutions. World Scientific.
https://doi.org/10.1142/9781786340139_fmatter, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa31735
http://www.worldscientific.com/worldscibooks/10.1142/q0004
Madsen, N., Knoop, M., & Thompson, R. (Eds.). (2014). Physics with Trapped Charged Particles. Imperial College Press.
https://doi.org/10.1142/p928, SU Repository: https://cronfa.swan.ac.uk/Record/cronfa17820
http://www.worldscientific.com/worldscibooks/10.1142/p928

Supervision

On Be+ - Assisted Antihydrogen Formation (current)

PhD

Other supervisor: Prof Stefan Eriksson
Towards a Precision Measurement of the 1S-2S Transition in Antihydrogen (current)

PhD

Other supervisor: Prof Stefan Eriksson
Enhanced diagnostics using laser cooled Be+ ions for antihydrogen synthesis and studies (current)

PhD

Other supervisor: Prof Stefan Eriksson
Antihydrogen spectroscopy: towards observing fluorescence and beyond n = 2 (current)

PhD

Other supervisor: Prof Stefan Eriksson
Machine Learning methods for Antihydrogen detection (current)

PhD

Other supervisor: Prof Gert Aarts
Laser-cooled Be+ for improved antihydrogen trapping and magnetometry (awarded 2023)

PhD

Other supervisor: Prof Stefan Eriksson
A proton source in the ALPHA apparatus for precision measurements of antihydrogen and hydrogen (awarded 2023)

PhD

Other supervisor: Prof Stefan Eriksson
Systematic studies of positron accumulation and transfer. (awarded 2024)

MSc

Other supervisor: Prof Dirk Van Der Werf

Taught Modules

PH-025 Atoms, Nuclei and Particles

Introduction to atomic physics, nuclear physics, and particle physics.
PH-333 Atomic Physics and Quantum Optics II

This module covers the basics of modern topics in atomic physics and quantum optics.

Public Engagements

Co-organiser of Antimatter Matters at the Royal Society Summer Science Exhibition in 2016.

Professor Niels Madsen

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Email address

Twitter Account

LinkedIn Account

Research Links

About

Areas Of Expertise

Career Highlights

Research Highlights

All Research

On Be+ - Assisted Antihydrogen Formation (current)

Towards a Precision Measurement of the 1S-2S Transition in Antihydrogen (current)

Enhanced diagnostics using laser cooled Be+ ions for antihydrogen synthesis and studies (current)

Antihydrogen spectroscopy: towards observing fluorescence and beyond n = 2 (current)

Machine Learning methods for Antihydrogen detection (current)

Laser-cooled Be+ for improved antihydrogen trapping and magnetometry (awarded 2023)

A proton source in the ALPHA apparatus for precision measurements of antihydrogen and hydrogen (awarded 2023)

Systematic studies of positron accumulation and transfer. (awarded 2024)

PH-025 Atoms, Nuclei and Particles

PH-333 Atomic Physics and Quantum Optics II