Multichannel Neutron Collimator for TRT

The project is described of the neutron camera for the tokamak with reactor technologies (TRT). The neutron camera is a multichannel neutron collimator covering the plasma neutron source with observation chords. The neutron camera is a system designed for measuring the profile of fusion neutron sour...

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Bibliographic Details
Published in:Plasma physics reports 2022-12, Vol.48 (12), p.1345-1351
Main Authors: Nemtsev, G. E., Rodionov, R. N., Khafizov, R. R., Kashchuk, Yu. A., Kormilitsyn, T. M., Krasilnikov, A. V.
Format: Article
Language:English
Subjects:
Atomic
Cameras
Channels
Collimators
Detectors
Diamonds
Lanthanum chlorides
Molecular
Neutron counters
Neutron flux
Neutron sources
Neutron spectra
Neutrons
Optical and Plasma Physics
Physics
Physics and Astronomy
Plasma
Polyethylenes
Scintillation counters
Stainless steels
Stilbene
Tokamak devices
Tokamaks
Vacuum chambers
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Summary:The project is described of the neutron camera for the tokamak with reactor technologies (TRT). The neutron camera is a multichannel neutron collimator covering the plasma neutron source with observation chords. The neutron camera is a system designed for measuring the profile of fusion neutron source in the poloidal cross section of the tokamak. The system conceptual design is proposed, which includes ten measuring channels of collimators that monitor the plasma in the radial direction. For more detailed covering the plasma neutron source with observation lines, it is proposed that the system will also be equipped with several vertical collimators. The channels of collimators are located inside the vacuum chamber ports, being partly introduced into the facility cryostat volume. Such a solution makes it possible to improve the coverage of the plasma volume by observation lines. It is proposed to use stainless steel and high-density borated polyethylene as materials for the collimators. It is planned to use diamond detectors and scintillators based on stilbene and lanthanum chloride as neutron detectors. The plasma neutron source is simulated in this work. Using radiative transport calculations, the neutron fluxes and spectra in the channels of collimators were obtained. The neutron camera of the TRT facility will make it possible to measure the profiles of neutron sources in DD and DT plasmas, as well as the ratios of emission intensities of DD and DT neutrons, neutron spectra, total neutron yields, and other parameters.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X22601304