Landau damping of the lower hybrid grill spectrum by tokamak edge electrons

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F09%3A00335852" target="_blank" >RIV/61389021:_____/09:00335852 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Landau damping of the lower hybrid grill spectrum by tokamak edge electrons
Original language description
According to theory and simulations Landau damping accelerates resonant electrons in front of a lower hybrid (LH) grill and generates substantial powerflows of order 1-10 MW/m2 along magnetic field lines. It is therefore of interest to understand the radial extent of this powerflow. Previous analyses predict interaction regions of order mm, whereas recent retarding field analyzer measurements detect energetic electron flows up to a few cm away from the grill mouth. It is shown here that the observed wide interaction region can be explained by electron Landau damping of the grill spectrum in the range 5<n//<200 by a mix of the thermal background with the generated fast electrons. Simulations show that in a typical Tore Supra tokamak plasma edge background with 25 MW/m2 of radiated antenna power density, the fast electrons exiting the grill region constitute about 7% of the electron population and are near-Maxwellian with a temperature of about 950 eV.
Czech name
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Czech description
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Project
<a href="/en/project/GA202%2F07%2F0044" target="_blank" >GA202/07/0044: Nonlinear Effects Near Antennas in Tokamaks</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 18th Topical Conference. AIP Conference Proceedings
ISBN
978-0-7354-0753-4
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
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Publisher name
American Institute of Physics
Place of publication
Melville
Event location
Ghent
Event date
Jun 24, 2009
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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