Neutronic analysis of JET external neutron monitor response

Snoj, Luka; Lengar, Igor; Čufar, Aljaž; Syme, B.; Popovichev, S.; Batistoni, P.; Conroy, S.

doi:10.1016/j.fusengdes.2016.03.046

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…Neutron detection in the tokamak is of significant importance for the following reasons: high-energy fusion neutrons are able to penetrate the vacuum chamber, causing damage to equipment in the experimental hall [2]; and fusion neutrons reflect multiple reaction parameters that are very important for the diagnosis and control of fusion reaction [3], namely plasma density, impurity interference, plasma core temperature, etc. Neutron detection is already widely utilized in tokamaks in the world, like JET [4] and ITER [5].…”

Section: Introductionmentioning

confidence: 99%

Extended Bonner sphere spectrometer for dynamic neutron spectrum on HL-2A

Jiang

Cao

Liu

et al. 2017

Plasma Sci. Technol.

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The extended Bonner sphere spectrometer (EBSS) at the HL-2A tokamak for the neutron spectrum is described. This device was developed on the basis of previous Bonner sphere spectrometry (BSS), aiming to obtain a more accurate neutron spectrum in the HL-2A tokamak hall. The previous BSS contained eight Bonner spheres (BS). This EBSS contains 13 3 He-filled detectors embedded in polyethylene spheres (PS), pre-amplifiers, and a parallel processing data acquisition system (DAQ). A response matrix is simulated in Geant4 taking the effect of the environment into account.

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Section: Introductionmentioning

confidence: 99%

Extended Bonner sphere spectrometer for dynamic neutron spectrum on HL-2A

Jiang

Cao

Liu

et al. 2017

Plasma Sci. Technol.

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A full and heterogeneous model of the ITER tokamak for comprehensive nuclear analyses

et al. 2021

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Calibration of neutron detectors on the Joint European Torus

Batistoni

Popovichev

Conroy

et al. 2017

Review of Scientific Instruments

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The present paper describes the findings of the calibration of the neutron yield monitors on the Joint European Torus (JET) performed in 2013 using a Cf source deployed inside the torus by the remote handling system, with particular regard to the calibration of fission chambers which provide the time resolved neutron yield from JET plasmas. The experimental data obtained in toroidal, radial, and vertical scans are presented. These data are first analysed following an analytical approach adopted in the previous neutron calibrations at JET. In this way, a calibration function for the volumetric plasma source is derived which allows us to understand the importance of the different plasma regions and of different spatial profiles of neutron emissivity on fission chamber response. Neutronics analyses have also been performed to calculate the correction factors needed to derive the plasma calibration factors taking into account the different energy spectrum and angular emission distribution of the calibrating (point)Cf source, the discrete positions compared to the plasma volumetric source, and the calibration circumstances. All correction factors are presented and discussed. We discuss also the lessons learnt which are the basis for the on-going 14 MeV neutron calibration at JET and for ITER.

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Neutronic analysis of JET external neutron monitor response

Cited by 5 publications

References 6 publications

Extended Bonner sphere spectrometer for dynamic neutron spectrum on HL-2A

Extended Bonner sphere spectrometer for dynamic neutron spectrum on HL-2A

A full and heterogeneous model of the ITER tokamak for comprehensive nuclear analyses

Calibration of neutron detectors on the Joint European Torus

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