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Measurements of fas...
Measurements of fast ions and their interactions with MHD activity using neutron emission spectroscopy
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- Hellesen, Carl, 1980- (author)
- Uppsala universitet,Tillämpad kärnfysik,Fusion diagnostics
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- Gatu Johnson, Maria (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Andersson Sundén, Erik (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Conroy, Sean (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Ericsson, Göran (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Eriksson, Jacob (author)
- Uppsala universitet,Tillämpad kärnfysik
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Gorini, G. (author)
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- Johnson, Thomas (author)
- KTH,Fusionsplasmafysik
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Kiptily, V. G. (author)
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Pinches, S. D. (author)
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Sharapov, S. E. (author)
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- Sjöstrand, Henrik (author)
- Uppsala universitet,Tillämpad kärnfysik
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Nocente, M. (author)
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Tardocchi, M. (author)
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- Weiszflog, Matthias (author)
- Uppsala universitet,Tillämpad kärnfysik
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(creator_code:org_t)
- 2010-07-28
- 2010
- English.
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In: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 50:8, s. 084006-
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Ion cyclotron radio frequency (ICRF) heating can produce fast ion populations with energies reaching up to several megaelectronvolts. Here, we present unique measurements of fast ion distributions from an experiment with 3rd harmonic ICRF heating on deuterium beams using neutron emission spectroscopy (NES). From the experiment, very high DD neutron rates were observed, using only modest external heating powers. This was attributed to acceleration of deuterium beam ions to energies up to about 2-3 MeV, where the DD reactivity is on a par with that of the DT reaction. The high neutron rates allowed for observations of changes in the fast deuterium energy distribution on a time scale of 50 ms. Clear correlations were seen between fast deuterium ions in different energy ranges and magnetohydrodynamic activities, such as monster sawteeth and toroidal Alfven eigen modes (TAE). Specifically, NES data showed that the number of deuterons in the region between 1 and 1.5 MeV were decaying significantly during strong TAE activity, while ions with lower energies around 500 keV were not affected. This was attributed to resonances with the TAE modes.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- ENERGETIC IONS
- JET PLASMAS
- RESONANCE
- PHYSICS
- Plasma physics
- Plasmafysik
- Nuclear physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Hellesen, Carl, ...
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Gatu Johnson, Ma ...
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Andersson Sundén ...
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Conroy, Sean
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Ericsson, Göran
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Eriksson, Jacob
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show more...
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Gorini, G.
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Johnson, Thomas
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Kiptily, V. G.
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Pinches, S. D.
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Sharapov, S. E.
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Sjöstrand, Henri ...
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Nocente, M.
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Tardocchi, M.
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Weiszflog, Matth ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
- Articles in the publication
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Nuclear Fusion
- By the university
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Royal Institute of Technology
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Uppsala University