Design of radial neutron spectrometer array for the International Thermonuclear Experimental Reactor

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147655· OSTI ID:451803

Nishitani, T; Kasai, S ^[1]; Iguchi, T; Takada, E ^[2]; Ebisawa, K; Kita, Y ^[3]

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1. Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken 311-01 (Japan)
2. University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)
3. TOSHIBA Corporation, Chiyoda-ku, Tokyo 100 (Japan)

We designed the radial neutron spectrometer using a new type DT neutron spectrometer base on a recoil proton counter-telescope technique aiming ion temperature measurement for the International Thermonuclear Experimental Reactor (ITER). The neutron spectrometer will be installed on the well collimated neutron beam line. A large area recoil proton emitter is placed parallel to the incident neutron beam and microchannel collimating plates are inserted between the radiator and the recoil proton detectors away from the neutron beam in order to limit the scattering angle of protons to the proton detectors. Here a very thin polyethylene film and a silicon surface barrier detector are employed as the radiator and proton detector, respectively. The energy resolution and detection efficiency are estimated to be 2.5{percent} and 1{times}10{sup {minus}5} countsneutron{sup {minus}1}m{sup 2}, respectively, for the DT neutron through Monte Carlo calculations. Five units of the spectrometers will be installed just outside the biological shield, will include a fan array using penetrations inside the bioshield and a precollimator in the horizontal port. The lifetime of the proton detectors is estimated to be about one year in the basic performance phase of ITER by neutron transport calculations using the Monte Carlo neutron and photon transport code (MCNP). {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 451803
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DESIGN
ITER TOKAMAK
MONTE CARLO METHOD
Monte Carlo methods
NEUTRON SPECTROMETERS
NEUTRON SPECTROSCOPY
PLASMA DIAGNOSTICS
TOKAMAK DEVICES
plasma temperature
plasma toroidal confinement
spectral methods of temperature measurement