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Triton burnup study using scintillating fiber detector on JT-60U

Abstract

The DT fusion reactor cannot be realized without knowing how the fusion-produced 3.5 MeV {alpha} particles behave. The {alpha} particles` behavior can be simulated using the 1 MeV triton. To investigate the 1 MeV triton`s behavior, a new type of directional 14 MeV neutron detector, scintillating fiber (Sci-Fi) detector has been developed and installed on JT-60U in the cooperation with LANL as part of a US-Japan collaboration. The most remarkable feature of the Sci-Fi detector is that the plastic scintillating fibers are employed for the neutron sensor head. The Sci-Fi detector measures and extracts the DT neutrons from the fusion radiation field in high time resolution (10 ms) and wide dynamic range (3 decades). Triton burnup analysis code TBURN has been made in order to analyze the time evolution of DT neutron emission rate obtained by the Sci-Fi detector. The TBURN calculations reproduced the measurements fairly well, and the validity of the calculation model that the slowing down of the 1 MeV triton was classical was confirmed. The Sci-Fi detector`s directionality indicated the tendency that the DT neutron emission profile became more and more peaked with the time progress. In this study, in order to examine the effect of the  More>>
Authors:
Harano, Hideki [1] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Publication Date:
Sep 01, 1997
Product Type:
Technical Report
Report Number:
JAERI-Research-97-060
Reference Number:
SCA: 700460; PA: JPN-97:010018; EDB-98:007405; SN: 98001890364
Resource Relation:
Other Information: PBD: Sep 1997
Subject:
70 PLASMA PHYSICS AND FUSION; JT-60U TOKAMAK; PLASMA DIAGNOSTICS; PROTON RECOIL DETECTORS; PLASTIC SCINTILLATORS; FIBERS; MAGNETIC FIELD RIPPLES; ION DRIFT; SLOWING-DOWN; TAIL IONS; NEOCLASSICAL TRANSPORT THEORY
OSTI ID:
555199
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98719295; TRN: JP9710018
Availability:
OSTI as DE98719295
Submitting Site:
JPN
Size:
140 p.
Announcement Date:

Citation Formats

Harano, Hideki. Triton burnup study using scintillating fiber detector on JT-60U. Japan: N. p., 1997. Web.
Harano, Hideki. Triton burnup study using scintillating fiber detector on JT-60U. Japan.
Harano, Hideki. 1997. "Triton burnup study using scintillating fiber detector on JT-60U." Japan.
@misc{etde_555199,
title = {Triton burnup study using scintillating fiber detector on JT-60U}
author = {Harano, Hideki}
abstractNote = {The DT fusion reactor cannot be realized without knowing how the fusion-produced 3.5 MeV {alpha} particles behave. The {alpha} particles` behavior can be simulated using the 1 MeV triton. To investigate the 1 MeV triton`s behavior, a new type of directional 14 MeV neutron detector, scintillating fiber (Sci-Fi) detector has been developed and installed on JT-60U in the cooperation with LANL as part of a US-Japan collaboration. The most remarkable feature of the Sci-Fi detector is that the plastic scintillating fibers are employed for the neutron sensor head. The Sci-Fi detector measures and extracts the DT neutrons from the fusion radiation field in high time resolution (10 ms) and wide dynamic range (3 decades). Triton burnup analysis code TBURN has been made in order to analyze the time evolution of DT neutron emission rate obtained by the Sci-Fi detector. The TBURN calculations reproduced the measurements fairly well, and the validity of the calculation model that the slowing down of the 1 MeV triton was classical was confirmed. The Sci-Fi detector`s directionality indicated the tendency that the DT neutron emission profile became more and more peaked with the time progress. In this study, in order to examine the effect of the toroidal field ripple on the triton burnup, R{sub p}-scan and n{sub e}-scan experiments have been performed. The R{sub p}-scan experiment indicates that the triton`s transport was increased as the ripple amplitude over the triton became larger. In the n{sub e}-scan experiment, the DT neutron emission showed the characteristic changes after the gas puffing injection. It was theoretically confirmed that the gas puffing was effective for the collisionality scan. (J.P.N.) 127 refs.}
place = {Japan}
year = {1997}
month = {Sep}
}