Physics
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nimpa.422...75m&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section A, Volume 422, Issue 1-3, p. 75-78.
Physics
2
Scientific paper
A new type of fast neutron spectrometer composed of a CH4 proportional counter and a Si semiconductor detector which is called the counter telescope type was constructed for plasma-temperature diagnostics. The counting gas CH4 is used as a converter of neutrons to protons. Since the energy loss of the proton in the converter CH4 can be fairly precisely measured with the proportional counter, the energy resolution for the proton is high, so that a good energy resolution for neutrons is obtained. The energy resolution of the spectrometer itself excluding the energy spread of the D-T 14MeV neutrons was 1.7% which seems to be the best so far, and the detection efficiency was 1×10-6. If better energy resolution is preferable, even 0.5% is obtained and the efficiency in this case is 4×10-8.
Gotoh J.
Iida Takahiro
Ikeda Yasufumi
Kaneko Junichi
Kasugai Yoshimi
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