A high S/N ratio spin flip chopper system for a pulsed neutron source

作者：Taketani K^*; Ebisawa T; Hino M; Hirota K; Ino T; Kitaguchi M; Mishima K; Muto S; Oide H; Oku T; Otone H; Sakai K; Shima T; Shimizu H M; Yamashita S; Yoshioka T

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2011, 634: S134-S137.

DOI：10.1016/j.nima.2010.06.357

• Neutron beta decay
• Spin flip chopper

We report a successful demonstration of a high SIN ratio spin flip chopper (SFC) system for pulsed neutron sources. The system consists of two SFCs and each SFC consists of a radio frequency (RF) flipper and Soller magnetic supermirrors. The aperture of the Soller mirror was 18 mm in width and 20 mm in height. The S/N ratio of the system was 306:1. This system is going to be installed to measure neutron lifetime precisely using the cold-neutron beam line, BL05 polarized-beam branch, at the Materials and Life Science Experimental Facility (MLF) in Japan Proton Accelerator Research Complex (J-PARC).

• 出版日期2011-4-1