Polarized3He system for T- and P-violation neutron experiments

Satō, Hiroshi; Masuda, Y.; Sakai, Kazumitsu; Doi, Masaru; Asahi, K.; Zheng, Zhao; Mori, Yuichiro; Delheij, P. P. J.; Matsuda, Y.; Iinuma, Munekazu; Shimizu, Hirohiko M.; Masaike, A.

doi:10.1007/bf02060665

Cited by 14 publications

(1 citation statement)

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“…At MLF of J-PARC, world class intense pulsed neutron beams are provided to 23 neutron beamlines, and many neutron scattering experiments are conducted 11 . In Japan, the fundamental development of 3 He polarization technique based on SEOP began in the 1990s 12 , and further development is still ongoing by Ino et al at High Energy Accelerator Research Organization [13][14][15][16][17] . An in-situ SEOP system dedicated for a polarized neutron spectrometer POLANO 11,18 at beamline No.…”

Section: Introductionmentioning

confidence: 99%

Development and application of a $^3$He Neutron Spin Filter at J-PARC

Okudaira,

Oku,

Ino

et al. 2020

Preprint

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We are developing a neutron polarizer with polarized 3 He gas, referred to as a 3 He spin filter, based on the Spin Exchange Optical Pumping (SEOP) for polarized neutron scattering experiments at Materials and Life Science Experimental Facility (MLF) of Japan Proton Accelerator Research Complex (J-PARC). A 3 He gas-filling station was constructed at J-PARC, and several 3 He cells with long spin relaxation times have been fabricated using the gas-filling station. A laboratory has been prepared in the MLF beam hall for polarizing 3 He cells, and compact pumping systems with laser powers of 30 W and 110 W, which can be installed onto a neutron beamline, have been developed. A 3 He polarization of 85% was achieved at a neutron beamline by using the pumping system with the 110 W laser. Recently, the first user experiment utilizing the 3 He spin filter was conducted, and there have been several more since then. The development and utilization of 3 He spin filters at MLF of J-PARC are reported.

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