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Volume 294 - The 3rd International Symposium on “Quest for the Origin of Particles and the Universe" (KMI2017) - Poster Presentations
Angle Calibration of emulsion read-out system for gamma-ray telescope by test beam
Y. Nakamura* on behalf of the GRAINE Collaboration
*corresponding author
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Pre-published on: 2017 November 22
Published on: 2017 November 24
Nuclear emulsion is a three-dimensional tracking detector with a sub-micron spatial resolution. Recently, the applications of nuclear emulsion have been expanding into imaging fields because of the improvement in scanning speed. Emulsion read-out systems exhibit an optical system- atic error in the angular measurement caused by the difference in refractive index. This error is conservatively estimated as 0.015 rad at an absolute track angle of 45°, which is a non-negligible value for the gamma-ray telescope experiment. We have evaluated this error experimentally using a test proton beam of 400 GeV at SPS/CERN. From the experimental results, the error decreased to 0.001 rad at an absolute track angle of 45°, which we will report on in this paper.
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