TY - JOUR
T1 - Cathode position response of large-area photomultipliers under a magnetic field
AU - Koblesky, T.
AU - Roloff, J.
AU - Polly, C.
AU - Peng, J. C.
N1 - Funding Information:
We gratefully acknowledge the advice and assistance of Professors D. Hertzog and K.B. Luk during the course of this measurement. This work is supported by the U.S. National Science Foundation .
PY - 2012/4/1
Y1 - 2012/4/1
N2 - With the increasingly common use of large area PMTs (photomultiplier tubes) for nuclear and particle physics experiments, information on the position dependent magnetic field effects across the PMTs photocathode is important to effectively analyze and understand data collected from PMTs. Using an automated two-dimensional scanner, we have measured the PMT response to an external magnetic field as a function of the cathode position impinged by a collimated light source. This study shows a clear dependence on the cathode position in both collection efficiency and gain of the PMT in the presence of a magnetic field. In particular, a pronounced valley in the collection efficiency is observed for certain locations of the cathode when the magnetic field is transverse to the PMT axis. The pattern of the position dependence is presented for several different magnitudes and orientations of the magnetic field relative to the PMT.
AB - With the increasingly common use of large area PMTs (photomultiplier tubes) for nuclear and particle physics experiments, information on the position dependent magnetic field effects across the PMTs photocathode is important to effectively analyze and understand data collected from PMTs. Using an automated two-dimensional scanner, we have measured the PMT response to an external magnetic field as a function of the cathode position impinged by a collimated light source. This study shows a clear dependence on the cathode position in both collection efficiency and gain of the PMT in the presence of a magnetic field. In particular, a pronounced valley in the collection efficiency is observed for certain locations of the cathode when the magnetic field is transverse to the PMT axis. The pattern of the position dependence is presented for several different magnitudes and orientations of the magnetic field relative to the PMT.
KW - PMT response in magnetic field
KW - Photo-multiplier tubes
UR - http://www.scopus.com/inward/record.url?scp=84855278213&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855278213&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2011.12.054
DO - 10.1016/j.nima.2011.12.054
M3 - Article
AN - SCOPUS:84855278213
VL - 670
SP - 40
EP - 44
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -