TY - JOUR
T1 - Development of a transmittance monitor for high-intensity photon beams
AU - Matsumura, Y.
AU - Ishikawa, T.
AU - Honda, Y.
AU - Kido, S.
AU - Miyabe, M.
AU - Nagasawa, I.
AU - Nanbu, K.
AU - Shimizu, H.
AU - Takahashi, K.
AU - Tsuchikawa, Y.
AU - Yamazaki, H.
N1 - Funding Information:
The authors wish to thank the ELPH accelerator staff for providing the primary electron beam in stable condition. This work was supported in part by Grants-in-Aid for Scientific Research (A) No. 24244022 , for Scientific Research (C) No. 26400287 , and for Scientific Research (A) No. 16H02188 .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/9/11
Y1 - 2018/9/11
N2 - A transmittance monitor has been developed for the second tagged-photon beamline at the Research Center for Electron Photon Science, Tohoku University, Japan. In this beamline, an internal radiator is employed to produce the bremsstrahlung photon beam out of circulating electrons in a synchrotron. The transmittance, which is defined as the probability of finding a photon coming to the target position when an electron is detected with a photon-tagging counter, should be determined to deduce cross sections for photo-induced reactions. The developed monitor consists of a telescope of thin plastic scintillators with a positron and electron converter, and a dedicated circuit implemented in a field-programmable gate array chip. The transmittance can be measured with this monitor for high-intensity photon beams corresponding to 20 MHz tagging signals. The measured transmittance is found to be constant with respect to the photon intensity for each photon-tagging channel.
AB - A transmittance monitor has been developed for the second tagged-photon beamline at the Research Center for Electron Photon Science, Tohoku University, Japan. In this beamline, an internal radiator is employed to produce the bremsstrahlung photon beam out of circulating electrons in a synchrotron. The transmittance, which is defined as the probability of finding a photon coming to the target position when an electron is detected with a photon-tagging counter, should be determined to deduce cross sections for photo-induced reactions. The developed monitor consists of a telescope of thin plastic scintillators with a positron and electron converter, and a dedicated circuit implemented in a field-programmable gate array chip. The transmittance can be measured with this monitor for high-intensity photon beams corresponding to 20 MHz tagging signals. The measured transmittance is found to be constant with respect to the photon intensity for each photon-tagging channel.
KW - FPGA
KW - Meson photoproduction
KW - Photon transmittance
KW - Tagged photon
KW - Tagging efficiency
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U2 - 10.1016/j.nima.2018.06.025
DO - 10.1016/j.nima.2018.06.025
M3 - Article
AN - SCOPUS:85049386763
SN - 0168-9002
VL - 902
SP - 103
EP - 109
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
ER -