TY - JOUR
T1 - Performance of a multi-anode photomultiplier employing an ultra bi-alkali photo-cathode and rugged dynodes
AU - Toizumi, T.
AU - Inagawa, S.
AU - Nakamori, T.
AU - Kataoka, J.
AU - Tsubuku, Y.
AU - Yatsu, Y.
AU - Shimokawabe, T.
AU - Kawai, N.
AU - Okada, T.
AU - Ohtsu, I.
PY - 2009/6/1
Y1 - 2009/6/1
N2 - We report on the performance testing of a multi-anode photomultiplier (MAPMT), the R8900-200-M16MOD-UBA, newly developed by Hamamatsu Photonics K.K. Although the R8900 series offers the great advantage of a highly sensitive surface (≥80% of physical area), the quantum efficiency (Q.E.) was relatively low (at up to 20%). This paper describes two substantial changes we have made to the R8900-200-M16MOD-UBA: (1) improving the Q.E. to the 40% level by employing an ultra bi-alkali (UBA) photo-cathode and (2) constructing a rugged dynode that can withstand vibration for future use in space. We measured each pixel signal at the single photoelectron level and the signals of scintillation photons by using a 16-pixel plastic scintillator array. Thanks to high Q.E., good energy resolution of 29.9% (FWHM) was obtained for 59.5 keV γ-rays. We also demonstrated tolerance to vibration up to 17 Grms in possible launching vehicles.
AB - We report on the performance testing of a multi-anode photomultiplier (MAPMT), the R8900-200-M16MOD-UBA, newly developed by Hamamatsu Photonics K.K. Although the R8900 series offers the great advantage of a highly sensitive surface (≥80% of physical area), the quantum efficiency (Q.E.) was relatively low (at up to 20%). This paper describes two substantial changes we have made to the R8900-200-M16MOD-UBA: (1) improving the Q.E. to the 40% level by employing an ultra bi-alkali (UBA) photo-cathode and (2) constructing a rugged dynode that can withstand vibration for future use in space. We measured each pixel signal at the single photoelectron level and the signals of scintillation photons by using a 16-pixel plastic scintillator array. Thanks to high Q.E., good energy resolution of 29.9% (FWHM) was obtained for 59.5 keV γ-rays. We also demonstrated tolerance to vibration up to 17 Grms in possible launching vehicles.
KW - Multianode photomultiplier
KW - Ultra bi-alkali
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U2 - 10.1016/j.nima.2009.01.063
DO - 10.1016/j.nima.2009.01.063
M3 - Article
AN - SCOPUS:65749114306
SN - 0168-9002
VL - 604
SP - 168
EP - 173
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 - 1-2
ER -