Published January 23, 1989
| Version v1
Journal article
Power dependence of electron-cyclotron current drive for low- and high-field absorption in tokamaks
Description
A new relativistic, bounce-averaged Fokker-Planck--quasilinear code shows that for experimentally relevant rf power p/sub rf/(W/cm3) /[n/sub e/(10/sup 13/ cm/sup -3/)]2approx. >0.5, electron-cyclotron current-drive efficiency (absorptivity) is power dependent; at given plasma radius the current-drive efficiency increases above linear values for absorption of the rf on the low-field side of the cyclotron resonance layer, but decreases and even passes through zero for absorption on the high-field side. Thus, electron-cyclotron current-drive by high-field launch will generally not be suitable
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 62
- Journal Issue
- 4
- Series
- Phys. Rev. Lett.
- Journal Page Range
- 426-429
- ISSN
- 0031-9007
- CODEN
- PRLTA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20031274
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- CURRENT-DRIVE HEATING; CYCLOTRON RADIATION; DIFFUSION; EFFICIENCY; ENERGY DEPOSITION; FOKKER-PLANCK EQUATION; RELATIVISTIC PLASMA; RF SYSTEMS; TOKAMAK DEVICES
- Descriptors DEC
- BREMSSTRAHLUNG; CLOSED PLASMA DEVICES; DIFFERENTIAL EQUATIONS; ELECTROMAGNETIC RADIATION; EQUATIONS; HEATING; PARTIAL DIFFERENTIAL EQUATIONS; PLASMA; PLASMA HEATING; RADIATIONS; THERMONUCLEAR DEVICES