1. Development of a Compact Hard X-Ray Camera on the TST-2 Spherical Tokamak
- Author
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Hibiki Yamazaki, Naoto Tsujii, James H.P. Rice, Yi Peng, Osamu Watanabe, Yongtae Ko, Yasuo Yoshimura, Yuichi Takase, Yuki Aoi, Kyohei Matsuzaki, Yuki Osawa, Kotaro Iwasaki, and Akira Ejiri
- Subjects
Physics ,Optics ,hard X-ray measurement ,business.industry ,X-ray ,Development (differential geometry) ,spherical tokamak ,Spherical tokamak ,Condensed Matter Physics ,business ,lower hybrid wave ,pinhole camera ,LYSO scintillator - Abstract
A compact hard X-ray camera has been developed to study the behavior of fast electrons accelerated by lower hybrid waves in the TST-2 spherical tokamak. The camera consists of a pinhole made of tungsten alloy, a thin resin window, a thin LYSO scintillator disk, 5 fiber optic light guides and 5 photomultiplier tubes and shields. The camera is installed on a tangential port, and two-dimensional images are obtained by rotating the system around the axis of the port on a shot by shot basis. The typical energy range is 10 - 250 keV, and the energy resolution is about 100% (FWHM) at 100 keV. The measured images of a lower hybrid wave driven plasma show bright region at the inboard side (i.e., high field side).
- Published
- 2020
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