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2015 Fiscal Year Final Research Report

Development of an optical observation system using MPPCs for high time resolution

Research Project

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Project/Area Number 26610054
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionYamagata University

Principal Investigator

Nakamori Takeshi  山形大学, 理学部, 准教授 (30531876)

Project Period (FY) 2014-04-01 – 2016-03-31
Keywordsパルサー / 可視光 / MPPC
Outline of Final Research Achievements

We developed an optical photon detector employing 1 mm^2 MPPC manufactured by Hamamatsu cooled by Peltier cooler. We demonstrated its cooling capability down to more than -20 degrees relative to the circumstance temperature. When we operate this system in winter, the dark count rate is reduced as low as 1 kHz, which is a system requirement for the detection of periodic signals from the Crab pulsar.
We also developed a timing measurement system for the MPPC with a time resolution of 0.5 microsecond. We successfully demonstrated period detection using LED flashes. During this experiment, we found the time accuracy is limited by the system clock of the data acquisition system. Then we developed a dedicated time server directly connected to a GPS receiver. Finally we completed the whole observation device and system.

Free Research Field

宇宙物理学(実験)

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Published: 2017-05-10  

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