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.

A hydrogen beam to characterize the ASACUSA antihydrogen hyperfine spectrometer

Mascagna V.;
2019

Abstract

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.
http://www.sciencedirect.com/science/journal/01689002
Antihydrogen hyperfine structure; Atomic beam; Atomic hydrogen; Magnetic resonance;
Malbrunot, C.; Diermaier, M.; Simon, M. C.; Amsler, C.; Arguedas Cuendis, S.; Breuker, H.; Evans, C.; Fleck, M.; Kolbinger, B.; Lanz, A.; Leali, M.; Maeckel, V.; Mascagna, V.; Massiczek, O.; Matsuda, Y.; Nagata, Y.; Sauerzopf, C.; Venturelli, L.; Widmann, E.; Wiesinger, M.; Yamazaki, Y.; Zmeskal, J.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11383/2086839
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