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Neutron emission generated by fast deuterons accelerated with ion cyclotron heating at JET
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2010 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 50, no 2Article in journal (Refereed) Published
Abstract [en]

For the first time, the neutron emission from JET plasmas heated with combined deuterium neutral beam injection and third harmonic ion cyclotron radio frequency heating have been studied with neutron emission spectroscopy (NES). Very high DD neutron rates were observed with only modest external heating powers, which was attributed to acceleration of deuterium beam ions to energies of about 2-3 MeV, where the DD reactivity is on a par of that of the DT reaction. Fast deuterium energy distributions were derived from analysis of NES data and confirm acceleration of deuterium beam ions up to energies around 3 MeV, in agreement with theoretical predictions. The high neutron rates allowed for observations of changes in the fast deuterium populations on a time scale of 50 ms. Correlations were seen between fast deuterium ions at different energies and magnetohydrodynamic activities, such as monster sawtooth crashes and toroidal Alfven eigenmodes.

Place, publisher, year, edition, pages
2010. Vol. 50, no 2
Keyword [en]
energetic particles, plasmas
URN: urn:nbn:se:kth:diva-19292DOI: 10.1088/0029-5515/50/2/022001ISI: 000275322200002ScopusID: 2-s2.0-74949084672OAI: diva2:337339
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Johnson, Thomas J.
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Fusion Plasma Physics
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