Bucking coil implementation on PMT for active canceling of magnetic field

作者：Gogami T^*; Asaturyan A; Bono J; Baturin P; Chen C; Chiba A; Chiga N; Fujii Y; Hashimoto O; Kawama D; Maruta T; Maxwell V; Mkrtchyan A; Nagao S; Nakamura S N; Reinhold J; Shichijo A; Tang L; Taniya N; Wood S A; Ye Z

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2013, 729: 816-824.

DOI：10.1016/j,nima.2013.08.947

• Active magnetic field canceling
• Bucking coil
• Photomultiplier tube
• Cherenkov detector

Aerogel and water etherenkov detectors were employed to tag kaons for a A hypemuclear spectroscopic experiment which used the (e'K+) reaction in experimental Hall C at Jefferson Lab (JLab E05-115). Fringe fields from the kaon spectrometer magnet yielded similar to 5 gauss at the photomultiplier tubes for these detectors. These fields, which could not be easily passively shielded, would result in a lowered kaon detection efficiency if not mitigated. A bucking coil was placed on each photomultiplier tube to actively cancel this magnetic field, thus recovering kaon detection efficiency.

• 出版日期2013-11-21