Electron dynamics in the vicinity of Lower Hybrid antennas

Heating and current drive in tokamaks with Lower Hybrid (LH) waves appears to generate hot spots magnetically connected to LH antennas. Correlated to these spurious patterns of heat deposition, fast electron populations are also reported experimentally. A Vlasov-Poisson (1D, 1V) model is used to add...

Full description

Saved in:
Bibliographic Details
Published inJournal of physics. Conference series Vol. 775; no. 1; pp. 12015 - 12022
Main Authors Valade, L., Caschera, E., Ghendrih, P., Sarazin, Y., Ekedahl, A.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2016
Subjects
Antennas
Electrons
Physics
Tokamak devices
Online AccessGet full text

Cover

More Information
Summary:Heating and current drive in tokamaks with Lower Hybrid (LH) waves appears to generate hot spots magnetically connected to LH antennas. Correlated to these spurious patterns of heat deposition, fast electron populations are also reported experimentally. A Vlasov-Poisson (1D, 1V) model is used to address this problem. External drive by waves with appropriate spectrum to describe the physics induced by LH antennas is considered. Fast electron tails, symmetric in velocity, are shown to build-up. In the range considered in this work, the energy content of these tails is found to be proportional to the energy of the excitation LH waves.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/775/1/012015