Performance of a multi-anode photomultiplier employing an ultra bi-alkali photo-cathode and rugged dynodes

T. Toizumi, S. Inagawa, T. Nakamori, Jun Kataoka, Y. Tsubuku, Y. Yatsu, T. Shimokawabe, N. Kawai, T. Okada, I. Ohtsu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)168-173
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume604
Issue number1-2
DOIs
Publication statusPublished - 2009 Jun 1
Externally publishedYes

Fingerprint

dynodes
Photomultipliers
Quantum efficiency
quantum efficiency
alkalies
Anodes
Cathodes
anodes
cathodes
Pixels
pixels
vibration
launching
Launching
Scintillation
Photoelectrons
Full width at half maximum
Phosphors
Photonics
scintillation counters

Keywords

  • Multianode photomultiplier
  • Ultra bi-alkali

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Performance of a multi-anode photomultiplier employing an ultra bi-alkali photo-cathode and rugged dynodes. / Toizumi, T.; Inagawa, S.; Nakamori, T.; Kataoka, Jun; Tsubuku, Y.; Yatsu, Y.; Shimokawabe, T.; Kawai, N.; Okada, T.; Ohtsu, I.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 604, No. 1-2, 01.06.2009, p. 168-173.

Research output: Contribution to journalArticle

Toizumi, T. ; Inagawa, S. ; Nakamori, T. ; Kataoka, Jun ; Tsubuku, Y. ; Yatsu, Y. ; Shimokawabe, T. ; Kawai, N. ; Okada, T. ; Ohtsu, I. / Performance of a multi-anode photomultiplier employing an ultra bi-alkali photo-cathode and rugged dynodes. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2009 ; Vol. 604, No. 1-2. pp. 168-173.
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