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Absolute calibration of the neutron yield measurement on JT-60 Upgrade

Technical Report:

Abstract

Absolutely calibrated measurements of the neutron yield are important for the evaluation of the plasma performance such as the fusion gain Q in DD operating tokamaks. Total neutron yield is measured with {sup 235}U and {sup 238}U fission chambers and {sup 3}He proportional counters in JT-60 Upgrade. The in situ calibration was performed by moving the {sup 252}Cf neutron source toroidally through the JT-60 vacuum vessel. Detection efficiencies of three {sup 235}U and two {sup 3}He detectors were measured for 92 locations of the neutron point source in toroidal scans at two different major radii. The total detection efficiency for the torus neutron source was obtained by averaging the point efficiencies over the whole toroidal angle. The uncertainty of the resulting absolute plasma neutron source calibration is estimated to be {+-} 10%. (author).
Authors:
Nishitani, Takeo; Takeuchi, Hiroshi; [1]  Barnes, C W [2] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
  2. and others
Publication Date:
Oct 01, 1991
Product Type:
Technical Report
Report Number:
JAERI-M-91-176
Reference Number:
SCA: 700320; PA: JPN-91:012186; SN: 92000659220
Resource Relation:
Other Information: PBD: Oct 1991
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; JT-60U TOKAMAK; FUSION YIELD; CALIBRATION; FAST NEUTRONS; FISSION CHAMBERS; HE-3 COUNTERS; NEUTRON DETECTION; NEUTRON DOSIMETRY; ACCURACY; 700320; PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION
OSTI ID:
10117068
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE92768108; TRN: JP9112186
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
JPN
Size:
31 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Nishitani, Takeo, Takeuchi, Hiroshi, and Barnes, C W. Absolute calibration of the neutron yield measurement on JT-60 Upgrade. Japan: N. p., 1991. Web.
Nishitani, Takeo, Takeuchi, Hiroshi, & Barnes, C W. Absolute calibration of the neutron yield measurement on JT-60 Upgrade. Japan.
Nishitani, Takeo, Takeuchi, Hiroshi, and Barnes, C W. 1991. "Absolute calibration of the neutron yield measurement on JT-60 Upgrade." Japan.
@misc{etde_10117068,
title = {Absolute calibration of the neutron yield measurement on JT-60 Upgrade}
author = {Nishitani, Takeo, Takeuchi, Hiroshi, and Barnes, C W}
abstractNote = {Absolutely calibrated measurements of the neutron yield are important for the evaluation of the plasma performance such as the fusion gain Q in DD operating tokamaks. Total neutron yield is measured with {sup 235}U and {sup 238}U fission chambers and {sup 3}He proportional counters in JT-60 Upgrade. The in situ calibration was performed by moving the {sup 252}Cf neutron source toroidally through the JT-60 vacuum vessel. Detection efficiencies of three {sup 235}U and two {sup 3}He detectors were measured for 92 locations of the neutron point source in toroidal scans at two different major radii. The total detection efficiency for the torus neutron source was obtained by averaging the point efficiencies over the whole toroidal angle. The uncertainty of the resulting absolute plasma neutron source calibration is estimated to be {+-} 10%. (author).}
place = {Japan}
year = {1991}
month = {Oct}
}