Development of portable polarized 3He neutron spin filter and its application to magnetic field imaging at J-PARC

International Workshop on Neutron Optics and Detectors

Sakai, K.^1 ; Oku, T.^1 ; Hayashida, H.^1 ; Kira, H.^2 ; Shinohara, T.^1 ; Oikawa, K.^1 ; Harada, M.^1 ; Kakurai, K.^1 ; Aizawa, K.^1 ; Arai, M.^1 ; Sakaguchi, Y.^2 ; Suzuki, J.^2 ; Ino, T.^3 ; Ohoyama, K.^4

JAEA, Tokyo, Ibaraki 319-1195, Japan^1

Comprehensive Research Organization for Science and Society (CROSS), Tokyo, Ibaraki 319-1106, Japan^2

KEK, Tsukuba, Ibaraki 305-0801, Japan^3

Institute for Materials Research, Tohoku University, Sendai, Miyagi, 980-8577, Japan^4

关键词: 3He neutron spin filters;    Experimental facilities;    Magnetic field imaging;    Neutron energy range;    Neutron spin analysis;    Neutron time of flight;    Neutron wavelengths;    Spin exchange optical pumping;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/528/1/012016/pdf
DOI  :  10.1088/1742-6596/528/1/012016

来源: IOP

【 摘 要 】

In order to expand the measurable neutron energy range up to the energy of epithermal neutrons in polarized neutron experiments, a portable polarized3He neutron spin filter (NSF) was developed in the Materials and Life science experimental Facility (MLF) at J- PARC. After the generation of3He polarization through a spin exchange optical pumping method, the NSF was used as a neutron spin polarizer and flipper in a beam line. We constructed a simple neutron spin analysis apparatus with two3He NSFs and made a preliminary attempt to visualize magnetic fields generated by a coil. The results represented that our apparatus could function for neutron wavelengths between approximately 0.5-5 A through the use of a neutron time-of-flight method.