Oct 16 – 20, 2016
Europe/Zurich timezone

Development of a double-cusp trap for ground-state hyperfine spectroscopy of antihydrogen atoms

Oct 18, 2016, 5:50 PM


Dr Naofumi Kuroda (University of Tokyo)


The ASACUSA collaboration has developed a scheme for a high precision spectroscopy of the ground-state hyperfine splitting of antihydrogen atoms to test CPT symmetry. A Rabi-type spectroscopic technique is planned to be utilized with a key apparatus, a cusp trap. After a successful production of a flow of antihydrogen atoms from the prototype cusp trap, a new novel double-cusp trap has been developed, which is a combination of two anti-Helmholtz magnetic field configuration and an electrostatic nested well configuration by multiple ring electrodes. The double-cusp trap is expected to improve the polarization and focusing of antihydrogen beams. To efficiently synthesize antihydrogen atoms, an ultraslow antiproton beam from the MUSASHI antiproton trap is adiabatically transported and injected to positron plasma confined in the double-cusp trap. Ongoing experiments of antihydrogen synthesis and the expected characterization of antihydrogen beams will be discussed.

Primary author

Dr Naofumi Kuroda (University of Tokyo)


Dr Balint Radics (ETH Zürich) Prof. Evandro Lodi Rizzini (Università di Brescia) Dr Hiroyuki Higaki (Hiroshima University) Dr Horst Breuker (CERN) Prof. Luca Venturelli (Università di Brescia) Dr Marco Leali (Università di Brescia) Ms Minori Tajima (University of Tokyo) Dr Pierre Dupré (RIKEN) Dr Stefan Ulmer (RIKEN) Mr Takuya Matsudate (University of Tokyo) Mr Tatsuhito Kobayashi (University of Tokyo) Dr Valerio Mascagna (Università di Brescia) Dr Volkhard Mäckel (SMI) Prof. Yasunori Yamazaki (RIKEN) Dr Yasuyuki Kanai (RIKEN) Dr Yasuyuki Matsuda (University of Tokyo) Dr Yugo Nagata (Tokyo University of Agriculture and Technology)

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