TY - JOUR
T1 - Beam test of a prototype phoswich detector assembly for the PoGOLite astronomical soft gamma-ray polarimeter
AU - Kanai, Y.
AU - Ueno, M.
AU - Kataoka, J.
AU - Arimoto, M.
AU - Kawai, N.
AU - Yamamoto, K.
AU - Mizuno, T.
AU - Fukazawa, Y.
AU - Kiss, M.
AU - Ylinen, T.
AU - Marini Bettolo, C.
AU - Carlson, P.
AU - Klamra, W.
AU - Pearce, M.
AU - Chen, P.
AU - Craig, B.
AU - Kamae, T.
AU - Madejski, G.
AU - Ng, J. S.T.
AU - Rogers, R.
AU - Tajima, H.
AU - Thurston, T. S.
AU - Saito, Y.
AU - Takahashi, T.
AU - Gunji, S.
AU - Bjornsson, C. I.
AU - Larsson, S.
AU - Ryde, F.
AU - Bogaert, G.
AU - Kishimoto, S.
N1 - Funding Information:
We greatly appreciate the referees for their detailed comments which have improved this paper. We would also like to thank K. Hayashida for support for the experiment and valuable discussions. This work has been performed under the approval of the Photon Factory Program Advisory Committee (Proposal no. 2005G023). We appreciate the generous and friendly support of the KEK-PF staff. This work is partially supported by Grant-in-Aid for Science Research (KAKENHI) 16340055, Japan Society for the Promotion of Science (JSPS); by Kavli Institute for Particle Astrophysics and Cosmology, Stanford University; and by the Knut and Alice Wallenberg Foundation and The Swedish National Space Board. M.U. is supported by JSPS Research Fellowship for Young Scientists.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - We report about the beam test on a prototype of the balloon-based astronomical soft gamma-ray polarimeter, PoGOLite (Polarized Gamma-ray Observer - Light Version) conducted at KEK Photon Factory, a synchrotron radiation facility in Japan. The synchrotron beam was set at 30, 50, and 70 keV and its polarization was monitored by a calibrated polarimeter. The goal of the experiment was to validate the flight design of the polarimeter. PoGOLite is designed to measure polarization by detecting a Compton scattering and the subsequent photo-absorption in an array of 217 well-type phoswich detector cells (PDCs). The test setup included a first flight model PDC and a front-end electronics to select and reconstruct valid Compton scattering events. The experiment has verified that the flight PDC can detect recoil electrons and select valid Compton scattering events down to 30 keV from background. The measure azimuthal modulations (34.4%, 35.8% and 37.2% at 30, 50, and 70 keV, respectively) agreed within 10% (relative) with the predictions by Geant4 implemented with dependence on the initial and final photon polarizations.
AB - We report about the beam test on a prototype of the balloon-based astronomical soft gamma-ray polarimeter, PoGOLite (Polarized Gamma-ray Observer - Light Version) conducted at KEK Photon Factory, a synchrotron radiation facility in Japan. The synchrotron beam was set at 30, 50, and 70 keV and its polarization was monitored by a calibrated polarimeter. The goal of the experiment was to validate the flight design of the polarimeter. PoGOLite is designed to measure polarization by detecting a Compton scattering and the subsequent photo-absorption in an array of 217 well-type phoswich detector cells (PDCs). The test setup included a first flight model PDC and a front-end electronics to select and reconstruct valid Compton scattering events. The experiment has verified that the flight PDC can detect recoil electrons and select valid Compton scattering events down to 30 keV from background. The measure azimuthal modulations (34.4%, 35.8% and 37.2% at 30, 50, and 70 keV, respectively) agreed within 10% (relative) with the predictions by Geant4 implemented with dependence on the initial and final photon polarizations.
KW - Balloon experiment
KW - Hard X-ray
KW - Polarization
KW - Soft gamma-ray
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U2 - 10.1016/j.nima.2006.09.109
DO - 10.1016/j.nima.2006.09.109
M3 - Article
AN - SCOPUS:33845460678
SN - 0168-9002
VL - 570
SP - 61
EP - 71
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
IS - 1
ER -