Experimental and computational study of the injection of antiprotons into a positron plasma for antihydrogen production

被引：20

作者：

Amole, C. ^{[1
]}

Ashkezari, M. D. ^{[2
]}

Baquero-Ruiz, M. ^{[3
]}

Bertsche, W. ^{[4
,5
,6
]}

Butler, E. ^{[7
]}

Capra, A. ^{[1
]}

Cesar, C. L. ^{[8
]}

Charlton, M. ^{[4
]}

Deller, A. ^{[4
]}

Eriksson, S. ^{[4
]}

Fajans, J. ^{[3
,9
]}

Friesen, T. ^{[10
]}

Fujiwara, M. C. ^{[10
,11
]}

Gill, D. R. ^{[11
]}

Gutierrez, A. ^{[12
]}

Hangst, J. S. ^{[13
]}

Hardy, W. N. ^{[12
,14
]}

Hayden, M. E. ^{[2
]}

Isaac, C. A. ^{[4
]}

Jonsell, S. ^{[15
]}

Kurchaninov, L. ^{[11
]}

Little, A. ^{[3
]}

Madsen, N. ^{[4
]}

McKenna, J. T. K. ^{[16
]}

Menary, S. ^{[1
]}

Napoli, S. C. ^{[4
]}

Olchanski, K. ^{[11
]}

Olin, A. ^{[11
,17
]}

Pusa, P. ^{[16
]}

Rasmussen, C. O. ^{[13
]}

Robicheaux, F. ^{[18
]}

Sarid, E. ^{[19
]}

Shields, C. R. ^{[4
]}

Silveira, D. M. ^{[8
]}

So, C. ^{[3
]}

Stracka, S. ^{[11
]}

Thompson, R. I. ^{[10
]}

van der Werf, D. P. ^{[4
]}

Wurtele, J. S. ^{[3
,9
]}

Zhmoginov, A. ^{[3
]}

Friedland, L. ^{[20
]}

机构：

[1] York Univ, Dept Phys & Astron, Toronto, ON M3J 1P3, Canada

[2] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[4] Swansea Univ, Coll Sci, Dept Phys, Swansea SA2 8PP, W Glam, Wales

[5] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[6] Cockcroft Inst, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

[7] CERN, Dept Phys, CH-1211 Geneva 23, Switzerland

[8] Univ Fed Rio de Janeiro, Inst Fis, BR-21941 Rio De Janeiro, Brazil

[9] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[10] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[11] TRIUMF, Vancouver, BC V6T 2A3, Canada

[12] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[13] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[14] Canadian Inst Adv Res, Toronto, ON M5G 1Z8, Canada

[15] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden

[16] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England

[17] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada

[18] Auburn Univ, Dept Phys, Auburn, AL 36849 USA

[19] Nucl Res Ctr Negev, Dept Phys, IL-84190 Beer Sheva, Israel

[20] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

来源：

PHYSICS OF PLASMAS | 2013年 / 20卷 / 04期

基金：

美国国家科学基金会; 英国工程与自然科学研究理事会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.4801067

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

One of the goals of synthesizing and trapping antihydrogen is to study the validity of charge-parity-time symmetry through precision spectroscopy on the anti-atoms, but the trapping yield achieved in recent experiments must be significantly improved before this can be realized. Antihydrogen atoms are commonly produced by mixing antiprotons and positrons stored in a nested Penning-Malmberg trap, which was achieved in ALPHA by an autoresonant excitation of the antiprotons, injecting them into the positron plasma. In this work, a hybrid numerical model is developed to simulate antiproton and positron dynamics during the mixing process. The simulation is benchmarked against other numerical and analytic models, as well as experimental measurements. The autoresonant injection scheme and an alternative scheme are compared numerically over a range of plasma parameters which can be reached in current and upcoming antihydrogen experiments, and the latter scheme is seen to offer significant improvement in trapping yield as the number of available antiprotons increases. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4801067]

引用

页数：11

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