Development and irradiation test of lost alpha detection system for ITER

M. Nishiura, T. Nagasaka, K. Fujioka, Y. Fujimoto, T. Tanaka, T. Ido, S. Yamamoto, S. Kashiwa, M. Sasao

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Abstract

We developed a lost alpha detection system to use in burning plasma experiments. The scintillators of Ag:ZnS and polycrystalline Ce:YAG were designed for a high-temperature environment, and the optical transmission line was designed to transmit from the scintillator to the port plug. The required optical components of lenses and mirrors were irradiated using the fission reactor with the initial result that there was no clear change after the irradiation with a neutron flux of 9.6× 1017 nm-2 s-1 for 48 h. We propose a diagnostic of alpha particle loss, so-called alpha particle induced gamma ray spectroscopy. The initial laboratory test has been carried out by the use of the Ce doped Lu2SiO 5 scintillator detector and an Am-Be source to detect the 4.44 MeV high energy gamma ray due to the 9Be (α,nγ) 12C reaction.

Original languageEnglish
Article number10D313
JournalReview of Scientific Instruments
Volume81
Issue number10
DOIs
Publication statusPublished - Oct 1 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Nishiura, M., Nagasaka, T., Fujioka, K., Fujimoto, Y., Tanaka, T., Ido, T., ... Sasao, M. (2010). Development and irradiation test of lost alpha detection system for ITER. Review of Scientific Instruments, 81(10), [10D313]. https://doi.org/10.1063/1.3485118