NDLI: Development of high-homogeneity magnetic field coil for 129Xe EDM experiment

Content Provider	Springer Nature Link
Author	Sakamoto, Y. Bidisti, C. P. Ichikawa, Y. Sato, T. Ohtomo, Y. Kojima, S. Funayama, C. Suzuki, T. Tsuchiya, M. Furukawa, T. Yoshimi, A. Ue, H. Matsuo, Y. Fukuyama, T. Asahi, K.
Copyright Year	2015
Abstract	We search for 129Xe EDM by using an active nuclear spin maser. In this experiment, the amplitude of the maser oscillation signal is one of the most important parameters that eventually determine the frequency precision. The amplitude is proportional to the ratio of the transverse spin relaxation time T 2 to the effective longitudinal spin relaxation time $T_{1}^{\ast }$ . In particular, for a spin maser of 3He (a co-magnetometer) for which $T_{1}^{\ast }$ typically reaches ∼50 h, a long T 2 is needed. T 2 depends on the homogeneity of the magnetic field which is applied with coils in order to keep the spins under precession. In the present report, we discuss on the design and construction of a new coil which provided a root-mean square (rms) field gradient of less than 5.0 μG/cm. The result of the field measurement has shown that the field gradient in the cell fulfills the target condition $\sqrt {\langle {(\nabla B_{z})^{2}} \rangle } <5\; \mu \text {G/cm}$ , and in fact T 2 of 3He has been measured to be as long as 11,000 s.
Starting Page	141
Ending Page	146
Page Count	6
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	230
Issue Number	1-3
e-ISSN	15729540
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-02-19
Publisher Place	Cham
Access Restriction	Subscribed
Subject Keyword	EDM Spin maser Magnetic coil Nuclear Physics, Heavy Ions, Hadrons Atomic, Molecular, Optical and Plasma Physics Condensed Matter Physics Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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