Miniaturized time-of-flight neutron spin flipper using a high-TC superconductor

A miniaturized neutron spin flipper based on a high- T C superconductor film, developed at the China Spallation Neutron Source (CSNS), is presented. A neutron spin flipper is an essential component for performing polarized neutron experiments and, as such, constitutes a high priority for developing...

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Bibliographic Details
Published in:Nuclear science and techniques 2022-11, Vol.33 (11), p.113-119
Main Authors: Dong, Yu-Chen, Wang, Tian-Hao, Kreuzpaintner, Wolfgang, Liu, Xiao-Tao, Li, Ze-Hui, Kang, Yu-Dong, Zhang, Jun-Pei, Tian, Long, Huang, Chu-Yi, Bai, Bo, Tong, Xin
Format: Article
Language:English
Subjects:
Beam Physics
Nuclear Energy
Particle Acceleration and Detection
Particle and Nuclear Physics
Physics
Physics and Astronomy
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Summary:A miniaturized neutron spin flipper based on a high- T C superconductor film, developed at the China Spallation Neutron Source (CSNS), is presented. A neutron spin flipper is an essential component for performing polarized neutron experiments and, as such, constitutes a high priority for developing CSNS’s polarized neutron capability. To provide the beamlines with a universal neutron spin flipper operating over a wide wavelength band, the neutron spin flipper utilizes non-adiabatic spin flipping during transit through opposite magnetic fields that are mutually shielded by the superconductor Meissner effect. A compact vacuum heat shield and a low-power consumption sterling refrigerator maintained the superconducting condition while reducing the size and power input of the flipper. The prototype device was tested at the CSNS BL-20, which demonstrated a flipping efficiency of 99% at 4 Å.
ISSN:1001-8042
2210-3147
DOI:10.1007/s41365-022-01134-7