Absolute calibration of neutron detectors on the C-2U advanced beam-driven FRC.
Rev Sci Instrum
; 87(11): 11D815, 2016 Nov.
Article
in En
| MEDLINE
| ID: mdl-27910544
ABSTRACT
In the C-2U fusion energy experiment, high power neutral beam injection creates a large fast ion population that sustains a field-reversed configuration (FRC) plasma. The diagnosis of the fast ion pressure in these high-performance plasmas is therefore critical, and the measurement of the flux of neutrons from the deuterium-deuterium (D-D) fusion reaction is well suited to the task. Here we describe the absolute, in situ calibration of scintillation neutron detectors via two independent methods:
firing deuterium beams into a high density gas target and calibration with a 2 × 107 n/s AmBe source. The practical issues of each method are discussed and the resulting calibration factors are shown to be in good agreement. Finally, the calibration factor is applied to C-2U experimental data where the measured neutron rate is found to exceed the classical expectation.
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Collection:
01-internacional
Database:
MEDLINE
Type of study:
Prognostic_studies
Language:
En
Journal:
Rev Sci Instrum
Year:
2016
Document type:
Article
Affiliation country:
Estados Unidos