A hydrogen beam to characterize the ASACUSA antihydrogen hyperfine spectrometer
A hydrogen beam to characterize the ASACUSA antihydrogen hyperfine spectrometer
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用于表征 ASACUSA 反氢超精细光谱仪的氢束
DOI：
10.1016/j.nima.2019.04.060
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
M. Wiesinger,
中科院分区：
文献类型：
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作者：
C. Malbrunot;M. Diermaier;M.C. Simon;C. Amsler;S. Arguedas Cuendis;H. Breuker; C. Evans;M. Fleck;B. Kolbinger;A. Lanz;M. Leali;V. Maeckel;V. Mascagna;O. Massiczek;Y. Matsuda;Y. Nagata;C. Sauerzopf ;L. Venturelli;E. Widmann;M. Wiesinger,
CERN 反质子减速器的 ASACUSA 合作项目的反氢项目重点是反氢基态超精细分裂的拉比型测量，以测试电荷-宇称-时间组合对称性。该光谱仪由一个驱动超精细跃迁的微波腔和一个通过斯特恩-格拉赫分离进行量子态分析的超导六极磁体组成。然而，反氢的产率较低，阻碍了光谱仪综合性能的研究。为此，我们开发了氢源和探测器，与 ASACUSA 的超精细光谱设备一起形成完整的拉比实验。我们报告了冷却、偏振和时间调制的原子氢束的形成及其使用四极质谱仪和锁定放大方案的检测。此外还讨论了 ASACUSA 超精细光谱仪的主要特征。
The antihydrogen program of the ASACUSA collaboration at the antiproton decelerator of CERN focuses on Rabi-type measurements of the ground-state hyperfine splitting of antihydrogen for a test of the combined Charge–Parity–Time symmetry. The spectroscopy apparatus consists of a microwave cavity to drive hyperfine transitions and a superconducting sextupole magnet for quantum state analysis via Stern–Gerlach separation. However, the small production rates of antihydrogen forestall comprehensive performance studies on the spectroscopy apparatus. For this purpose a hydrogen source and detector have been developed which in conjunction with ASACUSA’s hyperfine spectroscopy equipment form a complete Rabi experiment. We report on the formation of a cooled, polarized, and time modulated beam of atomic hydrogen and its detection using a quadrupole mass spectrometer and a lock-in amplification scheme. In addition key features of ASACUSA’s hyperfine spectroscopy apparatus are discussed.