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Neutron Spectra from Beam-Heated Fusion Plasmas
KTH. (Fusionsplasmafysik)ORCID iD: 0000-0001-6379-1880
1984 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 224, no 3, p. 519-531Article in journal (Refereed) Published
Abstract [en]

The spectra of fusion neutrons emerging from a deuterium-beam heated deuterium or tritium plasma yield information of both the bulk plasma and of the beam slowing down. A computer code has been developed to model plasma-plasma (p-p), beam-plasma (b-p) and beam-beam (b-b) interaction for the case of a single or several co-directed beams. It is found that for a high-temperature plasma (T ⪢ 1 keV) b-b interaction is negligible due to the low associated neutron emission. p-p neutron spectra reflect the bulk ion plasma temperature and density as well as toroidal rotational velocity. b-p spectra shifts and broadenings are sensitive to beam injection geometry and deposition, beam energy, ion and electron temperature, toroidal rotation and the density of neutrals. The mixing of full energy beam neutrals with half- and third-energy components has only a slight impact on the neutron spectrum when the beam power is held constant. For a JET-like Tokamak (D → D, beam power 5 MW, beam energy 160 keV) it is further found that for T ⪡ 8 keV the b-p neutron flux dominates, whereas for T ⪢ 8 keV the p-p flux dominates.

Place, publisher, year, edition, pages
1984. Vol. 224, no 3, p. 519-531
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:kth:diva-240878DOI: 10.1016/0167-5087(84)90043-7ISI: A1984TG21100018Scopus ID: 2-s2.0-0021469394OAI: oai:DiVA.org:kth-240878DiVA, id: diva2:1275216
Note

QCR 20190128

Available from: 2019-01-04 Created: 2019-01-04 Last updated: 2020-03-10Bibliographically approved

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