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

Authors :: Taketani, K.
Ebisawa, T.
Hino, M.
Hirota, K.
Ino, T.
Kitaguchi, M.
Mishima, K.
Muto, S.
Oide, H.
Oku, T.
Otono, H.
Sakai, K.
Shima, T.
Shimizu, H.M.
Yamashita, S.
Yoshioka, T.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Apr2011 Supplement, Vol. 634 Issue 1, pS134-S137. 0p.
Publication Year :: 2011
Abstract: Abstract: We report a successful demonstration of a high S/N 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 18mm in width and 20mm 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). [Copyright &y& Elsevier]