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Ryu, Dongsu
Astrophysics Lab
Research Interests
  • Shock waves and turbulence in clusters of galaxies
  • Origin and evolution of magnetic fields and cosmic rays in the universe
  • Plasma astrophysical phenomena in the large-scale structure of the universe

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Gain monitoring of telescope array photomultiplier cameras for the first 4 years of operation

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Title
Gain monitoring of telescope array photomultiplier cameras for the first 4 years of operation
Author
Shin B.K.Tokuno H.Tsunesada Y.Abu-Zayyad T.Aida R.Allen M.Anderson R.Azuma R.Barcikowski E.Belz J.W.Bergman D.R.Blake S.A.Cady R.Cheon B.G.Chiba J.Chikawa M.Cho E.J.Cho W.R.Fujii H.Fujii T.Fukuda T.Fukushima M.Hanlon W.Hayashi K.Hayashi Y.Hayashida N.Hibino K.Hiyama K.Honda K.Iguchi T.Ikeda D.Ikuta K.Inoue N.Ishii T.Ishimori R.Ivanov D.Iwamoto S.Jui C.C.H.Kadota K.Kakimoto F.Kalashev O.Kanbe T.Kasahara K.Kawai H.Kawakami S.Kawana S.Kido E.Kim H.B.Kim H.K.Kim J.H.Kim J.H.Kitamoto K.Kitamura S.Kitamura Y.Kobayashi K.Kobayashi Y.Kondo Y.Kuramoto K.Kuzmin V.Kwon Y.J.Lim S.I.Machida S.Martens K.Martineau J.Matsuda T.Matsuura T.Matsuyama T.Matthews J.N.Myers I.Minamino M.Miyata K.Murano Y.Nagasawa K.Nagataki S.Nakamura T.Nam S.W.Nonaka T.Ogio S.Ohnishi M.Ohoka H.Oki K.Oku D.Okuda T.Oshima A.Ozawa S.Park I.H.Pshirkov M.S.Rodriguez D.C.Roh S.Y.Rubtsov G.Ryu, DongsuSagawa H.Sakurai N.Sampson A.L.Scott L.M.Shah P.D.Shibata F.Shibata T.Shimodaira H.Shin J.I.Shirahama T.Smith J.D.Sokolsky P.Sonley T.J.Springer R.W.Stokes B.T.Stratton S.R.Stroman T.Suzuki S.Takahashi Y.Takeda M.Taketa A.Takita M.Tameda Y.Tanaka H.Tanaka K.Tanaka M.Thomas S.B.Thomson G.B.Tinyakov P.Tkachev I.Tomida T.Troitsky S.Tsutsumi K.Tsuyuguchi Y.Uchihori Y.Udo S.Ukai H.Vasiloff G.Wada Y.Wong T.Wood M.Yamakawa Y.Yamane R.Yamaoka H.Yamazaki K.Yang J.Yoneda Y.Yoshida S.Yoshii H.Zhou X.Zollinger R.Zundel Z.
Keywords
Air fluorescence telescope; Calibration of photomultiplier; Ultra-high energy cosmic rays
Issue Date
2014-12
Publisher
ELSEVIER SCIENCE BV
Citation
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.768, no., pp.96 - 103
Abstract
The stability of the gain of the photomultiplier (PMT) camera for the Fluorescence Detector (FD) of the Telescope Array experiment was monitored using an 241Am loaded scintillator pulsers (YAP) and a diffused xenon flasher (TXF) for a selected set of 35 PMT-readout channels. From the monitoring of YAP pulses over four years of FD operation, we found slow monotonic drifts of PMT gains at a rate of -1.7∼+1.7%/year. An average of the PMT gains over the 35 channels stayed nearly constant with a rate of change measured at -0.01±0.31(stat)±0.21(sys)%/year. No systematic decrease of the PMT gain caused by the night sky background was observed. Monitoring by the TXF also tracked the PMT gain drift of the YAP at 0.88±0.14(stat)%/year.
URI
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DOI
10.1016/j.nima.2014.09.059
ISSN
0168-9002
Appears in Collections:
PHY_Journal Papers
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