Dynamics of antiproton cooling in a positron plasma during antihydrogen formation

被引：50

作者：

Amoretti, M

Amsler, C

Bonomi, G

Bouchta, A

Bowe, PD

Carraro, C

Cesar, CL

Charlton, M

Doser, M

Filippini, V

Fontana, A

Fujiwara, MC

Funakoshi, R

Genova, P

Hangst, JS

Hayano, RS

Jorgensen, LV

Kellerbauer, A

Lagomarsino, V

Landua, R

Lindelof, D

Rizzini, EL

Macrí, M

Madsen, N

Manuzio, G

Montagna, P

Pruys, H

Regenfus, C

Rotondi, A

Testera, G

Variola, A

Venturelli, L

van der Werf, DP

Yamazaki, Y

机构：

[1] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[2] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

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

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

[5] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[6] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil

[7] Univ Pavia, Ist Nazl Fis Nucl, I-27100 Pavia, Italy

[8] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

[9] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

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

[11] Univ Brescia, Dipartimento Chim Fis & Ingn Mat, I-25123 Brescia, Italy

来源：

PHYSICS LETTERS B | 2004年 / 590卷 / 3-4期

基金：

英国工程与自然科学研究理事会;

关键词：

antihydrogen; cooling; nested trap; positron plasma; antiprotons;

D O I：

10.1016/j.physletb.2004.03.073

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We demonstrate cooling of 10(4) antiprotons in a dense, cold plasma of similar to 10(8) positrons, confined in a nested cylindrical Penning trap at about 15 K. The time evolution of the cooling,process has been studied in detail, and several distinct types of behavior identified. We propose explanations for these observations and discuss the consequences for antihydrogen production. We contrast these results with observations of interactions between antiprotons and "hot" positrons at about 3000 K, where antihydrogen production is strongly suppressed. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：133 / 142

页数：10

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