Effect of poloidal electric field on electron cyclotron current drive in a tokamak geometry

Journal Article · Fri Dec 01 00:00:00 EST 2000 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.1317522· OSTI ID:40205959

Lee, Sanghyuk; Chang, C S

Effect of a poloidal electric field on the electron cyclotron current drive is studied in a tokamak geometry. A general discussion of its influence on the electron phase-space dynamics and current drive efficiency is presented. It is shown that the modification to the current drive efficiency increases as the heating location is moved out in the major radius. It is concluded that the modification is only moderate to insignificant (<10% for low magnetic field side heating and <3% for high field side heating) for a poloidal electrostatic potential variation of order inverse aspect ratio under an efficient current drive.

• Sponsoring Organization: (US)
• OSTI ID: 40205959
• Journal Information: Physics of Plasmas, Vol. 7, Issue 12; Other Information: DOI: 10.1063/1.1317522; Othernumber: PHPAEN000007000012004948000001; 006012PHP; PBD: Dec 2000; ISSN 1070-664X
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ASPECT RATIO
CYCLOTRONS
EFFICIENCY
ELECTRIC FIELDS
ELECTRONS
ELECTROSTATICS
GEOMETRY
HEATING
MAGNETIC FIELDS
MODIFICATIONS
PHASE SPACE
PHYSICS