In-situ compact 3He neutron spin polarizer based on a magneto-static cavity with built-in NMR coils

International Conference on Polarised Neutrons for Condensed Matter Investigations 2014

Lee, S.^1 ; Moon, M.K.^2 ; Kim, J.^2 ; Cho, S.J.^2 ; Lee, J.H.^3 ; Lee, C.-H.^3 ; Lee, S.W.^4 ; Ino, T.^5

Quantum Optics Division, Korea Atomic Energy Research Institute, Daejeon

305-353, Korea, Republic of^1

Neutron Instrument Development and Maintenance Division, Korea Atomic Energy Research Institute, Daejeon

305-353, Korea, Republic of^2

Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon

305-353, Korea, Republic of^3

School of Mechanical Engineering, Pusan National University, Busan

609-735, Korea, Republic of^4

Neutron Science Laboratory, KEK, Ibaraki, Tsukuba

305-0801, Japan^5

关键词: 3 He polarization;    3He neutron polarizers;    Beam lines;    Fiber coupled;    Neutron spins;    NMR signals;    Spectral bandwidth;    Volume Bragg gratings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/711/1/012014/pdf
DOI  :  10.1088/1742-6596/711/1/012014

来源: IOP

【 摘 要 】

A polarized3He neutron polarizer for in-situ neutron beam line operation was developed based on a compact magneto-static cavity with a dimension of 280270300 mm3and a fiber-coupled VBG (Volume Bragg Grating) diode laser with a narrow spectral bandwidth of 25 GHz. Built-in NMR coils of the neutron spin polarizer designed for NMR signal measurements were described in detail and their performances were tested for monitoring the progress of in-situ3He polarization.