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In August 1989, a workshop held at the Princeton Plasma Physics Laboratory reviewed the techniques, uncertainties and experiences of neutron calibration on PLT, TFTR, JET, Tore Supra, JT-60, JIPPT-IIU, Alcator C-Mod, ATF, FT, ASDEX, TEXTOR and DIII-D. The summary session included a discussion of possible consensus neutron calibration techniques appropriate to D-D plasmas in tokamaks. The application of such techniques would facilitate a more accurate comparison of neutron yields from different devices, and also allow new calibration techniques to relate their precision to a reference value. General agreement was reached on the suitability of two techniques: a 252Cf source calibration of epithermal neutron detectors, and threshold neutron activation of Ni foils placed vertically above or below the plasma. This review of the meeting gives details of detector positioning, neutron transport calculations and the interlab normalisation needed to accomplish the standardised calibration using a Cf neutron source.

Additional information

Authors: STRACHAN J D ET AL., Princeton University, Plasma Physics Laboratory, Princeton (US)
Bibliographic Reference: Article: Review of Scientific Instruments, Vol. 61 (1990) No. 11, pp. 3501-3504
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