Strategy for the absolute neutron emission measurement on ITER

Sasao, M.; Bertalot, L.; Ishikawa, M.; Popovichev, S.
October 2010
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10D329
Academic Journal
Accuracy of 10% is demanded to the absolute fusion measurement on ITER. To achieve this accuracy, a functional combination of several types of neutron measurement subsystem, cross calibration among them, and in situ calibration are needed. Neutron transport calculation shows the suitable calibration source is a DT/DD neutron generator of source strength higher than 1010 n/s (neutron/second) for DT and 108 n/s for DD. It will take eight weeks at the minimum with this source to calibrate flux monitors, profile monitors, and the activation system.


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