ASACUSA collaboration has been making a path to realize high precision microwave spectroscopy of ground-state hyperfine transitions of antihydrogen atom in flight for stringent test of the CPT symmetry. Recently, we have succeeded in synthesizing our first cold antihydrogen atoms employing a CUSP trap. It is expected that synthesized antihydrogen atoms in the low-field-seeking states are preferentially focused along the cusp magnetic field axis whereas those in the high-field-seeking states are not focused, resulting in the formation of a spin-polarized antihydrogen beam. We report the recent results of antihydrogen atom synthesis and beam production developed with the CUSP trap.
KeywordsAntihydrogen CPT invariance Atomic beam Hyperfine splitting
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- 1.Niering, M., et al.: Phys. Rev. Lett. 84, 2000 (5496)Google Scholar
- 2.Ramsey, N.: In: T. Kinoshita (ed.) Quantum Electrodynamics, pp. 673–695. World Scientific, Singapore (1990)Google Scholar
- 5.ASACUSA Collaboration: Tech. Rep. SPSC-P-307 Add.1. CERN-SPSC 2005-006, CERN, Geneva (2005)Google Scholar