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

✍ Scribed by K. Taketani; T. Ebisawa; M. Hino; K. Hirota; T. Ino; M. Kitaguchi; K. Mishima; S. Muto; H. Oide; T. Oku; H. Otono; K. Sakai; T. Shima; H.M. Shimizu; S. Yamashita; T. Yoshioka

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 400 KB
• Volume: 634
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2010.06.357

✦ Synopsis

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 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).