Monte Carlo optimization of a Compton suppression system for gamma-ray diagnosis of combustion plasma

Zou, Qing; Zhu, J. J.; An, Zhu; Zhang, Y.P.

doi:10.1016/j.nima.2017.10.039

Cited by 9 publications

(2 citation statements)

References 18 publications

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“…The optimized size of the BGO secondary detector has been calculated and determined by Geant4 modeling. 24,25 The HPGe detector on the adjustment platform can move the HPGe crystal into the BGO cavity like a piston, as shown in Fig. 1, thus forming an anti-coincidence detector.…”

Section: Articlementioning

confidence: 99%

A gamma ray spectrometer with Compton suppression on the HL-2A tokamak

Zhang

Cheng

et al. 2022

Review of Scientific Instruments

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A new broad-energy, high-resolution gamma ray spectrometer (GRS) with Compton suppression function has been developed recently in the HL-2A tokamak to obtain the gamma ray information in the energy range of 0.1–10 MeV. This is the first time to develop an anti-Compton GRS for a magnetic confinement fusion device. The anticoincidence detector consists of a large-volume high purity germanium (HPGe) crystal (Φ63 × 63 mm2) as the primary detector and eight trapezoidal bismuth germinate (BGO) scintillators (trapezoid crystal with 30 mm thickness) as the secondary detector. The anti-coincidence data processing is implemented by a digital-based data acquisition system with fast digitization and software signal processing technology. Using radioisotope gamma ray sources and Monte Carlo N-Particle code, the energy and efficiency of the spectrometer have been calibrated and quantitatively tested. The Compton continuum suppression factor reaches 4.2, and the energy resolution (Full Width at Half Maximum) of the 1.332 MeV full energy peak for 60Co is 2.1 keV. Measurements of gamma ray spectra with Compton suppression using the spectrometer have been successfully performed during HL-2A discharges with different conditions. The performance of the spectrometer and the first experimental results are presented in this paper.

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Section: Articlementioning

confidence: 99%

A gamma ray spectrometer with Compton suppression on the HL-2A tokamak

Zhang

Cheng

et al. 2022

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

“…Related works use a variety of performance criteria to characterize CSS designs. The most commonly retained figures of merit (FoM) that account for both the FEP favouring and Compton continuum reduction are defined in references [13] and [14]. Based on these works, we hereby define one absolute and one relative FoM for our CSS assessment:…”

Section: B Figures Of Merit Of Cssmentioning

confidence: 99%