Modification of the current profile in DIII-D by off-axis electron cyclotron current drive
نویسندگان
چکیده
منابع مشابه
Off-axis Electron Cyclotron Current Drive for Current Profile Control in Tokamaks*
Steady-state operation in a tokamak requires full noninductive support of the plasma current. Known methods of driving noninductive current are too inefficient to support more than a small fraction of the total plasma current. The route to a steady state tokamak lies through the Advanced Tokamak approach, for which improved confinement and stability support the plasma pressure at reduced plasma...
متن کاملCurrent Profile Modification with Electron Cyclotron Current Drive in the Diiiðd Tokamak*
Proof-of-principle experiments on the suitability of electron cyclotron current drive (ECCD) for active current profile control are reported. Experiments with second harmonic extraordinary mode absorption at power levels near 1 MW have demonstrated ability to modify the current profile. This modification is manifested in changes in the internal inductance and the time at which sawteeth appear. ...
متن کاملRadial transport and electron-cyclotron-current drive in the TCV and DIII-D tokamaks.
Calculation of electron-cyclotron-current drive (ECCD) with the comprehensive CQL3D Fokker-Planck code for a TCV tokamak shot gives 550 kA of driven toroidal current, in marked disagreement with the 100-kA experimental value. Published ECCD efficiencies calculated with CQL3D in the much larger, higher-confinement DIII-D tokamak are in excellent agreement with experiment. The disagreement is res...
متن کاملTH/P3-1 Off-axis Neutral Beam Current Drive for Advanced Scenario Development in DIII-D
Modification of the two existing DIII-D neutral beam lines is proposed to allow vertical steering to provide off-axis neutral beam current drive (NBCD) as far off-axis as half the plasma radius. New calculations indicate very good current drive with good localization off-axis as long as the toroidal magnetic field, BT, and the plasma current, Ip, are in the same direction (for a beam steered do...
متن کاملFast Wave Current Drive on Diii - D
The physics of electron heating and current drive with the fast magnetosonic wave has been demonstrated on DIU-D , in reasonable agreement with theoretical modeling. A recently completed upgrade to the fast wave capability should allow f id noninductive current drive in steady state advanced confinement discharges and provide some current density profile control for the Advanced Tokamak Program...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Plasma Physics and Controlled Fusion
سال: 1999
ISSN: 0741-3335,1361-6587
DOI: 10.1088/0741-3335/41/12b/308