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Activation material selection for multiple foil activation detectors in JET TT campaign
EUROfus Consortium, Culham Sci Ctr, Abingdon, Oxon, England;Jozef Stefan Inst, Jamova Cesta 39, Ljubljana, Slovenia.
EUROfus Consortium, Culham Sci Ctr, Abingdon, Oxon, England;Jozef Stefan Inst, Jamova Cesta 39, Ljubljana, Slovenia.
EUROfus Consortium, Culham Sci Ctr, Abingdon, Oxon, England;Jozef Stefan Inst, Jamova Cesta 39, Ljubljana, Slovenia.
EUROfus Consortium, Culham Sci Ctr, Abingdon, Oxon, England;ENEA, I-00044 Rome, Italy;CCFE, Abingdon OX14 3DB, Oxon, England.
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2018 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 136, p. 988-992Article in journal (Refereed) Published
Abstract [en]

In the preparation for the Deuterium-Tritium campaign, JET will operate with a tritium plasma. The T + T reaction consists of two notable channels: (1) T + T -> He-4 + 2n, (2) T + T -> He-5 + n -> He-4 + 2n. The reaction channel (1) is the reaction with the highest branching ratio and a continuum of neutron energies being produced. Reaction channel (2) produces a spectrum with a peak at 8.8 MeV. A particular problem is the ratio between the individual TT reaction channels, which is highly dependent on the energy of the reacting tritium ions. There are very few measurements on the TT spectrum and the study at JET would be interesting. The work is focused on the determination of the spectral characteristics in the TT plasma discharges, especially on the presence of the 8.8 MeV peak, a consequence of channel (2) of the TT reaction. The possibility to use an optimized set of activation materials in order to target the measurement of the 8.8 MeV peak is studied. The lower limit of detection for the channel (2) ratio within the TT reaction is estimated and the influence of DT source neutrons, which are a consequence of deuterium traces in the plasma, is investigated.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2018. Vol. 136, p. 988-992
Keywords [en]
JET, TT plasma, Spectroscopy, Activation measurements
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:uu:diva-372896DOI: 10.1016/j.fusengdes.2018.04.052ISI: 000452575300030OAI: oai:DiVA.org:uu-372896DiVA, id: diva2:1278739
Conference
13th International Symposium on Fusion Nuclear Technology (ISFNT), SEP 25-29, 2017, Kyoto, JAPAN
Available from: 2019-01-15 Created: 2019-01-15 Last updated: 2019-01-15Bibliographically approved

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Conroy, Sean

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