A neutron detector based on EJ301 liquid scintillator has been employed at EAST to measure the neutron energy spectrum for D-D fusion plasma. The detector was carefully characterized in different quasi-monoenergetic neutron fields generated by a 4.5 MV Van de Graaff accelerator. In recent experimental campaigns, due to the low neutron yield at EAST, a new shielding device was designed and located as close as possible to the tokamak to enhance the count rate of the spectrometer. The fluence of neutrons and γ-rays was measured with the liquid neutron spectrometer and was consistent with 3He proportional counter and NaI(Tl) γ-ray spectrometer measurements. Plasma ion temperature values were deduced from the neutron spectrum in discharges with lower hybrid wave injection and ion cyclotron resonance heating. Scattered neutron spectra were simulated by the Monte Carlo transport Code, and they were well verified by the pulse height measurements at low energies. © 2013 IOP Publishing Ltd and Sissa Medialab srl.

Yuan, X., Zhang, X., Xie, X., Gorini, G., Chen, Z., Peng, X., et al. (2013). Neutron energy spectrum measurements with a compact liquid scintillation detector on EAST. JOURNAL OF INSTRUMENTATION, 8(7), P07016-P07016 [10.1088/1748-0221/8/07/P07016].

Neutron energy spectrum measurements with a compact liquid scintillation detector on EAST

GORINI, GIUSEPPE;
2013

Abstract

A neutron detector based on EJ301 liquid scintillator has been employed at EAST to measure the neutron energy spectrum for D-D fusion plasma. The detector was carefully characterized in different quasi-monoenergetic neutron fields generated by a 4.5 MV Van de Graaff accelerator. In recent experimental campaigns, due to the low neutron yield at EAST, a new shielding device was designed and located as close as possible to the tokamak to enhance the count rate of the spectrometer. The fluence of neutrons and γ-rays was measured with the liquid neutron spectrometer and was consistent with 3He proportional counter and NaI(Tl) γ-ray spectrometer measurements. Plasma ion temperature values were deduced from the neutron spectrum in discharges with lower hybrid wave injection and ion cyclotron resonance heating. Scattered neutron spectra were simulated by the Monte Carlo transport Code, and they were well verified by the pulse height measurements at low energies. © 2013 IOP Publishing Ltd and Sissa Medialab srl.
Articolo in rivista - Articolo scientifico
Neutron detectors (cold, thermal, fast neutrons); Nuclear instruments and methods for hot plasma diagnostics; Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators); Instrumentation; Mathematical Physics
English
2013
8
7
P07016
P07016
P07016
none
Yuan, X., Zhang, X., Xie, X., Gorini, G., Chen, Z., Peng, X., et al. (2013). Neutron energy spectrum measurements with a compact liquid scintillation detector on EAST. JOURNAL OF INSTRUMENTATION, 8(7), P07016-P07016 [10.1088/1748-0221/8/07/P07016].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/67485
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