Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 729, Issue -, Pages 816-824Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2013.08.047
Keywords
Active magnetic field canceling; Bucking coil; Photomultiplier tube; Cherenkov detector
Categories
Funding
- Specially promoted program [12002001]
- Creative research program [16GS0201]
- MEXT, Japan [15684005]
- JSPS Research Fellowships for Young Scientists [244123]
- US-Japan collaboration research program
- JSPS Core-to-Core Program [21002]
- Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation by JSPS [R2201]
- U.S. Department of Energy [DE-AC05-060R23177]
- Grants-in-Aid for Scientific Research [15684005] Funding Source: KAKEN
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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. (C) 2013 Elsevier B.V. All rights reserved
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