PHYSICS OF ELECTRON CYCLOTRON CURRENT DRIVE ON DIII-D

Conference · Thu Oct 31 23:00:00 EST 2002

OSTI ID:813675

PETTY, CC; PRATER, R; LUCE, TC; ELLIS, RA; HARVEY, RW; KINSEY, JE; LAO, LL; LOHR, J; MAKOWSKI, MA

OAK A271 PHYSICS OF ELECTRON CYCLOTRON CURRENT DRIVE ON DIII-D. Recent experiments on the DIII-D tokamak have focused on determining the effect of trapped particles on the electron cyclotron current drive (ECCD) efficiency. The measured ECCD efficiency increases as the deposition location is moved towards the inboard midplane or towards smaller minor radius for both co and counter injection. The measured ECCD efficiency also increases with increasing electron density and/or temperature. The experimental ECCD is compared to both the linear theory (Toray-GA) as well as a quasilinear Fokker-Planck model (CQL3D). The experimental ECCD is found to be in better agreement with the more complete Fokker-Planck calculation, especially for cases of high rf power density and/or loop voltage.

• Research Organization: GENERAL ATOMICS (US)
• Sponsoring Organization: (US)
• DOE Contract Number: AC03-99ER54463
• OSTI ID: 813675
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CYCLOTRONS
DEPOSITION
DOUBLET-3 DEVICE
EFFICIENCY
ELECTRON DENSITY
ELECTRONS
IAEA
PHYSICS
POWER DENSITY
THERMONUCLEAR REACTORS