J-PARC Particle and Nuclear Physics Seminar

(J-PARC 素粒子原子核セミナー)


DATE: Mar. 6, 2020. 16:00-17:30

VENUE:
   Room 227, Tokai 1st Bldg., Tokai-campus

TITLE: Development of the thermal muon source for the muon g-2/EDM experiment at J-PARC


LANGUAGE: English

SPEAKER: Dr. Kazuhito Suzuki (KEK IPNS)

HOST: T. Mibe

CONTACT: S. Mihara, O. Morimatsu, K. Aoki (j-parc-pn-seminar-(AT)-ml.post.kek.jp)



Abstract:

The J-PARC E34 experiment is progressing in realization to measure the muon anomalous magnetic moment, aμ= (g-2)/2, and electric dipole moment (EDM). Its unique, innovative experimental approach based on a small-emittance muon beam is indispensable to reveal new physics beyond the standard model. Such a muon beam can be obtained by accelerating muons thermalized in the form of muonium atom (μ+e-) in silica aerogel at room temperature, having subsequent laser-ionization. A slab of silica aerogel with laser ablation on its face has been developed for the muonium production target, giving the muonium yield of 3.4 x 10^-3 per incident muon projected in the laser-ionization region of the experiment. Optimization of the ablation structure is on-going to achieve a higher yield, which improves the experimental sensitivity directly. Collaborations with other projects that utilize thermal muons and muonium atoms result in the synergy to develop high-power laser systems for muonium ionization. The current status on the development of thermal muon source will be presented having the above-mentioned activities.