Sympathetically cooled and compressed positron plasma

被引：48

作者：

Jelenkovic, BM ^{[1
]}

Newbury, AS

Bollinger, JJ

Itano, WM

Mitchell, TB

机构：

[1] Natl Inst Stand & Technol, Div Time & Frequency, Boulder, CO 80303 USA

[2] Univ Belgrade, Inst Phys, Belgrade, Serbia

[3] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[4] Ball Aerosp Syst Grp, Boulder, CO 80301 USA

来源：

PHYSICAL REVIEW A | 2003年 / 67卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.67.063406

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report sympathetic cooling and compression of a few thousand positrons by laser-cooled Be-9(+) ions in a Penning ion trap. The observed centrifugal separation of the two species implies approximate rigid rotation of the positrons and Be-9(+) ions, and a positron density comparable to the Be-9(+) ion density of greater than or similar to4x10(9) cm(-3). We use the sharpness of the separation to place a 5-K upper limit on the positron temperature of motion parallel to the magnetic field. The positron lifetime is greater than two weeks in our room-temperature Penning trap.

引用

页数：9

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