Driven production of cold antihydrogen and the first measured distribution of antihydrogen states -: art. no. 233401
Driven production of cold antihydrogen and the first measured distribution of antihydrogen states -: art. no. 233401
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DOI：
10.1103/physrevlett.89.233401
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发表时间：
2002-12-02
影响因子：
8.6
通讯作者：
Hessels, EA
中科院分区：
文献类型：
--
作者：
Gabrielse, G;Bowden, NS;Hessels, EA
当反质子在嵌套的潘宁陷阱内反复与冷正电子碰撞时，就会产生冷反氢。在反质子的正电子冷却的许多循环过程中，会发生有效的反氢产生。使用分离的产生区域和检测区域之间的预电离电场进行反氢态分布的第一次测量。幸存的反氢在电离井中被剥离，电离井捕获并存储释放的反质子以进行无背景检测。
Cold antihydrogen is produced when antiprotons are repeatedly driven into collisions with cold positrons within a nested Penning trap. Efficient antihydrogen production takes place during many cycles of positron cooling of antiprotons. A first measurement of a distribution of antihydrogen states is made using a preionizing electric field between separated production and detection regions. Surviving antihydrogen is stripped in an ionization well that captures and stores the freed antiproton for background-free detection.