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Some reports on Hamamatsu MPPC's



Hall D Electronics:

 From LANL HEP-EX:


Title: Application of Hamamatsu MPPC to T2K Neutrino Detectors
Authors: M. Yokoyama, T. Nakaya, S. Gomi, A. Minamino, N.Nagai, K. Nitta, D.
   Orme, M. Otani, T. Murakami, T. Nakadaira, M. Tanaka, Yu. Kudenko, F.
   Retiere, A. Vacheret
Categories: physics.ins-det astro-ph hep-ex nucl-ex
Comments: Contribution to the proceedings of NDIP 2008, Aix-les-Bains, France,
   June 15-20, 2008
\\
   A special type of Hamamatsu MPPC, with a sensitive area of 1.3x1.3mm2
containing 667 pixels with 50x50um2 each, has been developed for the near
neutrino detector in the T2K long baseline neutrino experiment. About 60 000
MPPCs will be used in total to read out the plastic scintillator detectors with
wavelength shifting fibers. We report on the basic performance of MPPCs
produced for T2K.
\\ ( http://arxiv.org/abs/0807.3145 ,  303kb)
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\\
arXiv:0807.3147 (*cross-listing*)
Date: Sun, 20 Jul 2008 09:09:04 GMT   (810kb)


Title: Mass production test of Hamamatsu MPPC for T2K neutrino oscillation
   experiment
Authors: M. Yokoyama, T. Nakaya, S. Gomi, A. Minamino, N. Nagai, K. Nitta, D.
   Orme, M. Otani, T. Murakami, T. Nakadaira, M. Tanaka
Categories: physics.ins-det astro-ph hep-ex nucl-ex
Comments: Contribution to the proceedings of NDIP 2008, Aix-les-Bains, France,
   June 15-20, 2008
\\
   In the T2K near neutrino detectors, about 60 000 Hamamatsu Multi-Pixel Photon
Counters (MPPCs) will be used. The mass production of MPPC has started in
February 2008.In order to perform quality assurance and to characterize each
device, we have developed an MPPC test system. For each MPPC, gain, breakdown
voltage, noise rate, photo detection efficiency, and cross-talk and after-pulse
rate are measured as functions of the bias voltage and temperature. The design
of the test system and the measurement procedure are described.
\\ ( http://arxiv.org/abs/0807.3147 ,  810kb)
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\\
arXiv:0807.3217 (*cross-listing*)
Date: Mon, 21 Jul 2008 14:33:02 GMT   (54kb)



-- 

				Sincerely,
					Elliott


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  Those raised in a morally relative or neutral environment will hold
		    no truths to be self-evident.
				

Elliott Wolin
Staff Physicist, Jefferson Lab
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Suite 8 MS 12A1
Newport News, VA 23606
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