TY - GEN
T1 - Study of a lost alpha-induced gamma-ray detection system for ITER
AU - Kashiwa, S.
AU - Sasao, M.
AU - Okamoto, A.
AU - Kitajima, S.
AU - Nishiura, M.
AU - Veshchev, E.
AU - Loughlin, M.
AU - Polunovskiy, E.
AU - Bertalot, L.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84875660908&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84875660908
SN - 9781622763313
T3 - 37th EPS Conference on Plasma Physics 2010, EPS 2010
SP - 1644
EP - 1647
BT - 37th EPS Conference on Plasma Physics 2010, EPS 2010
T2 - 37th EPS Conference on Plasma Physics 2010, EPS 2010
Y2 - 21 June 2010 through 25 June 2010
ER -
