Neutron electric dipole moment measurement with a buffer gas comagnetometer

作者：Masuda Yasuhiro^*; Asahi Koichiro; Hatanaka Kichiji; Jeong Sun Chan; Kawasaki Shinsuke; Matsumiya Ryohei; Matsuta Kensaku; Mihara Mototsugu; Watanabe Yutaka

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2012, 376(16): 1347-1351.

DOI：10.1016/j.physleta.2012.02.056

• EDM
• Magnetometer
• NMR

A neutron EDM measurement with a comagnetometer is discussed. For magnetometry, polarized xenon atoms are injected into a cylindrical cell where a cylindrically symmetric magnetic field and an electric field are applied for the EDM measurement. The geometric phase effect (GPE), which originates from particle motion in a magnetic field gradient, is analyzed in terms of the Dyson series. The motion of the xenon atom is largely suppressed because of a small mean free path. The field gradient is controlled by means of NMR measurements, where the false effect of Earth%26apos;s rotation is removed. As a result, the GPE is reduced below 10(-28)e cm.

• 出版日期2012-3-19