Determination of hydrogen/deuterium ratio with neutron measurements on MAST
2014 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 85, no 11, 11E109- p.Article in journal (Refereed) Published
On MAST, compressional Alfven eigenmodes can be destabilized by the presence of a sufficiently large population of energetic particles in the plasma. This dependence was studied in a series of very similar discharges in which increasing amounts of hydrogen were puffed into a deuterium plasma. A simple method to estimate the isotopic ratio n(H)/n(D) using neutron emission measurements is here described. The inferred isotopic ratio ranged from 0.0 to 0.6 and no experimental indication of changes in radial profile of n(H)/n(D) were observed. These findings are confirmed by TRANSP/NUBEAM simulations of the neutron emission.
Place, publisher, year, edition, pages
2014. Vol. 85, no 11, 11E109- p.
IdentifiersURN: urn:nbn:se:uu:diva-240140DOI: 10.1063/1.4889910ISI: 000345646000129PubMedID: 25430288OAI: oai:DiVA.org:uu-240140DiVA: diva2:776637