Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 935, Issue -, Pages 110-120Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2019.04.060
Keywords
Atomic hydrogen; Antihydrogen hyperfine structure; Magnetic resonance; Atomic beam
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Funding
- European Research Council under European Union's Seventh Framework Programme (FP7/2007-2013)/ERC Grant [291242]
- Austrian Ministry of Science and Research, Austrian Science Fund (FWF) DK PI [W 1252]
- CERN fellowship, Switzerland
- DAAD RISE programme
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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.
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