Počet záznamů: 1
Landau damping of the lower hybrid grill spectrum by tokamak edge electrons
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SYSNO ASEP 0335852 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Landau damping of the lower hybrid grill spectrum by tokamak edge electrons Tvůrce(i) Fuchs, Vladimír (UFP-V) RID
Gunn, J. P. (FR)
Petržílka, Václav (UFP-V) RID, ORCID
Horáček, Jan (UFP-V) RID, ORCID
Seidl, Jakub (UFP-V) RID
Ekedahl, A. (FR)
Goniche, M. (FR)
Hillairet, J. (FR)Zdroj.dok. RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 18th Topical Conference. AIP Conference Proceedings, 1187. - Melville : American Institute of Physics, 2009 / Bobkov V. ; Noterdaeme J.-M. - ISBN 978-0-7354-0753-4 Rozsah stran s. 383-386 Poč.str. 4 s. Akce Topical Conference on Radio Frequency Power in Plasmas/18th./ Datum konání 24.06.2009-26.06.2009 Místo konání Ghent Země BE - Belgie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Lower hybrid wave ; tokamak ; plasma Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP GA202/07/0044 GA ČR - Grantová agentura ČR CEZ AV0Z20430508 - UFP-V (2005-2011) Anotace 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. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2010
Počet záznamů: 1