Study on in situ calibration for neutron flux monitor in the Large Helical Device based on Monte Carlo calculations

Y. Nakano, A. Yamazaki, K. Watanabe, A. Uritani, K. Ogawa, M. Isobe

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Neutron monitoring is important to manage safety of fusion experiment facilities because neutrons are generated in fusion reactions. Monte Carlo simulations play an important role in evaluating the influence of neutron scattering from various structures and correcting differences between deuterium plasma experiments and in situ calibration experiments. We evaluated these influences based on differences between the both experiments at Large Helical Device using Monte Carlo simulation code MCNP5. A difference between the both experiments in absolute detection efficiency of the fission chamber between O-ports is estimated to be the biggest of all monitors. We additionally evaluated correction coefficients for some neutron monitors.

Original languageEnglish
Article number11E116
JournalReview of Scientific Instruments
Volume85
Issue number11
DOIs
Publication statusPublished - Nov 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation

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