Study of a lost alpha-induced gamma-ray detection system for ITER

S. Kashiwa, M. Sasao, A. Okamoto, S. Kitajima, M. Nishiura, E. Veshchev, M. Loughlin, E. Polunovskiy, L. Bertalot

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The concept of lost alpha measurement by 4.44 MeV gamma ray detection produced by the nuclear reaction 9Be(α,nγ)12C was examined for ITER. A MCNP calculation was carried out to evaluate the neutron flux in the port plug, where a gamma-ray detector is supposed to be located. The results showed the total neutron flux was at least 1011 ∼ 1012 cm-2s-1 at the detector location. One of the candidate detectors for the 4.44 MeV gamma-ray measurement is a Ce:LSO scintillator. The response of Ce:LSO to neutrons was estimated for each neutron energy region, and then they are convoluted with the neutron flux at the detector location. It was found that an additional neutron shield layer is needed to reduce neutron fluxes by a factor of 103 at least.

Original languageEnglish
Title of host publication37th EPS Conference on Plasma Physics 2010, EPS 2010
Pages1644-1647
Number of pages4
Publication statusPublished - 2010 Dec 1
Event37th EPS Conference on Plasma Physics 2010, EPS 2010 - Dublin, Ireland
Duration: 2010 Jun 212010 Jun 25

Publication series

Name37th EPS Conference on Plasma Physics 2010, EPS 2010
Volume3

Other

Other37th EPS Conference on Plasma Physics 2010, EPS 2010
CountryIreland
CityDublin
Period10/6/2110/6/25

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Kashiwa, S., Sasao, M., Okamoto, A., Kitajima, S., Nishiura, M., Veshchev, E., Loughlin, M., Polunovskiy, E., & Bertalot, L. (2010). Study of a lost alpha-induced gamma-ray detection system for ITER. In 37th EPS Conference on Plasma Physics 2010, EPS 2010 (pp. 1644-1647). (37th EPS Conference on Plasma Physics 2010, EPS 2010; Vol. 3).