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Title: Absolute calibration of neutron detectors on the C-2U advanced beam-driven FRC

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 × 10{sup 7} 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.

Authors:
; ; ; ; ; ; ;  [1]
  1. Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States)
Publication Date:
OSTI Identifier:
22596536
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM INJECTION; BEAMS; CALIBRATION; DENSITY; DEUTERIUM; DIAGNOSIS; FIELD-REVERSED THETA PINCH DEVICES; HEAVY ION FUSION REACTIONS; IONS; NEUTRON DETECTORS; NEUTRON FLUX; NEUTRONS; PERFORMANCE; PLASMA; SCINTILLATIONS; THERMONUCLEAR REACTIONS; THERMONUCLEAR REACTORS

Citation Formats

Magee, R. M., E-mail: rmagee@trialphaenergy.com, Clary, R., Korepanov, S., Jauregui, F., Allfrey, I., Garate, E., Valentine, T., and Smirnov, A. Absolute calibration of neutron detectors on the C-2U advanced beam-driven FRC. United States: N. p., 2016. Web. doi:10.1063/1.4960416.
Magee, R. M., E-mail: rmagee@trialphaenergy.com, Clary, R., Korepanov, S., Jauregui, F., Allfrey, I., Garate, E., Valentine, T., & Smirnov, A. Absolute calibration of neutron detectors on the C-2U advanced beam-driven FRC. United States. doi:10.1063/1.4960416.
Magee, R. M., E-mail: rmagee@trialphaenergy.com, Clary, R., Korepanov, S., Jauregui, F., Allfrey, I., Garate, E., Valentine, T., and Smirnov, A. Tue . "Absolute calibration of neutron detectors on the C-2U advanced beam-driven FRC". United States. doi:10.1063/1.4960416.
@article{osti_22596536,
title = {Absolute calibration of neutron detectors on the C-2U advanced beam-driven FRC},
author = {Magee, R. M., E-mail: rmagee@trialphaenergy.com and Clary, R. and Korepanov, S. and Jauregui, F. and Allfrey, I. and Garate, E. and Valentine, T. and Smirnov, A.},
abstractNote = {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 × 10{sup 7} 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.},
doi = {10.1063/1.4960416},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2016},
month = {Tue Nov 15 00:00:00 EST 2016}
}