Measuring the isotope effect on the gross beryllium erosion in JET

Cal, E. de la and Ben Yaala, M., JET Contributors (2022) Measuring the isotope effect on the gross beryllium erosion in JET. Nuclear Fusion, 62 (12). 126021. ISSN 0029-5515 (https://doi.org/10.1088/1741-4326/ac8aae)

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Abstract

The isotope effect, hydrogen (H) versus deuterium (D), on the gross beryllium (Be) erosion yield has been measured in ohmic limiter plasmas in JET tokamak by spectroscopic means. A simplified method to extract the effective sputtering yield from the quotient of the radiances of the Dα or Dγ and the Be II lines at 527 nm was applied. A clear isotope effect has been found, the erosion yield of D being about a factor of 2 larger compared to H in the whole explored plasma density range. This is in agreement with physical sputtering data obtained with H+ and D+ ion beams and also with material surface computer simulations. The already published contribution of chemically assisted physical sputtering has been also identified here. Currently the study is being extended to tritium (T) and D–T plasmas and the effect of helium mixtures.

  • Item type:Article
    ID code:87672
    Dates:
    Date
    Event
    11 October 2022
    Published
    18 August 2022
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Engineering > Biomedical Engineering
    Depositing user: Pure Administrator
    Date deposited:18 Dec 2023 15:30
    Last modified:09 Apr 2024 04:17
    URI:https://strathprints.strath.ac.uk/id/eprint/87672
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