Modification of the current profile in DIII-D by off-axis electron cyclotron current drive
Localized non-inductive currents due to electron cyclotron wave adsorption have been measured on the DIII-D tokamak. Clear evidence of non-inductive currents is seen on the internal magnetic field measurements by motional Stark effect spectroscopy. The magnitude and location of the non-inductive current is evaluated by comparing the total and ohmic current profiles of discharges with and without electron cyclotron wave power. The measured current agrees with Fokker-Planck calculations near the magnetic axis, but exceeds the predicted value as the location of the current drive is moved to the half-radius.
Bibliographic Reference: Article: Plasma Physics Controlled Fusion, Vol. 41 (1999) pp. B119-B127
Availability: Plasma Physics Controlled Fusion (Journal)
Record Number: 200012740 / Last updated on: 2000-09-08
Original language: en
Available languages: en