COOLING AND SLOWING OF TRAPPED ANTIPROTONS BELOW 100 MEV
COOLING AND SLOWING OF TRAPPED ANTIPROTONS BELOW 100 MEV
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DOI：
10.1103/physrevlett.63.1360
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发表时间：
1989-09-25
影响因子：
8.6
通讯作者：
KELLS, W
中科院分区：
文献类型：
--
作者：
GABRIELSE, G;FEI, X;KELLS, W
电子冷却被捕获的反质子，使其存储的能量比任何反质子存储环中的能量低1000万倍。从LEAR的5.9 MeV反质子的单个脉冲中，超过60000个能量从0到3000 eV的反质子被存储在离子阱中。被捕获的反质子在超过50小时的存储寿命内保持其初始能量分布，除非允许与被捕获电子的冷缓冲气体碰撞，在那里，它们在几十秒内急剧冷却到1 eV。冷却后的反质子可以堆叠成一个谐波势，非常适合长期储存和精确测量。
Electron cooling of trapped antiprotons allows their storage at energies 10 million times lower than is available in any antiproton storage ring. More than 60 000 antiprotons with energies from 0 to 3000 eV are stored in an ion trap from a single pulse of 5.9-MeV antiprotons from LEAR. Trapped antiprotons maintain their initial energy distribution over a storage lifetime exceeding 50 h unless allowed to collide with a cold buffer gas of trapped electrons, where-upon they cool dramatically to 1 eV in tens of seconds. The cooled antiprotons can be stacked into a harmonic potential well suited for long-term storage and precision measurements.