First measurement of neutron emission profile on JT-60U using Stilbene neutron detector with neutron-gamma discrimination

Ishikawa, M.; Nishitani, T.; Morioka, A.; Takechi, M.; Shinohara, K.; Shimada, M.; Miura, Y.; Nagami, M.; Kaschuck, Yu. A.
December 2002
Review of Scientific Instruments;Dec2002, Vol. 73 Issue 12, p4237
Academic Journal
This article describes a diagnostic for measuring neutron emission profile in JT-60U. The Stilbene neutron detector, developed by TRINITI laboratory in Russia, has been installed on the JT-60U Tokamak to measure the neutron emission profile for the first time. The Stilbene neutron detector is a detector which combines a Stilbene crystal scintillator with a neutron-gamma pulse shape discrimination circuit, with a very compact size. Performance tests were carried out using neutron and gamma-ray source prior to installation on JT-60U. Good gamma suppression of the Stilbene neutron detector was verified. Though the neutron emission profile obtained by Stilbene neutron detectors has error of 30% in innermost channel with a calculation using measured plasma parameters, there is an agreement within 10% error in the other channels.


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