Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Full-wave Calculation of Fast-wave Current Drive in Tokamaks Including K Sub Parallel Upshifts
Author: Full-wave Calculation of Fast-wave Current Drive in Tokamaks Including K Sub Parallel Variations
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Book Description
When fast waves propagate inward from the edge of a tokamak toward the plasma center, the k(up tack) spectrum produced by the antenna is not maintained but is shifted and deformed due to the presence of the finite poloidal magnetic field. This k(up tack) shift causes a variation in the parallel phase speed of the wave and can therefore have a strong effect on electron damping and current drive efficiency. In this paper, we include this effect in a new full-wave calculation (PICES) which represents the wave fields as a superposition of poloidal modes, thereby reducing k(up tack) to an algebraic operator. The wave equation is solved in general flux coordinates, including a full (non-perturbative) solution for E(up tack) and a reduced-order dielectric formulation to eliminate short-wavelength ion Bernstein modes. A simplified current drive model which includes particle trapping is used to estimate the effect of the k(up tack) shift on current drive efficiency in ITER and D3-D. Results suggest that when single-pass absorption is weak, reflected power may drive current nearly as efficiently as that absorbed on the first pass. 15 refs., 5 figs.
Scientific and Technical Aerospace Reports
Author: Government Reports Annual Index
Author: Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1840
Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Energy Research Abstracts
Author: Fusion Energy Update
Author: ERDA Energy Research Abstracts
Author: Fast Wave Current Drive Modeling in Tokamaks
Author: John C. WrightGovernment Reports Announcements & Index
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 476
Book Description
Radio Frequency Power in Plasmas
Author: Donald B. BatchelorPublisher: American Institute of Physics
ISBN:
Category : Science
Languages : en
Pages : 424
Book Description
The proceedings of the Ninth Topical Conference on [title], held in Charleston, SC, August 1991, comprise invited and contributed papers on topics in the areas of electron cyclotron range of frequencies, lower hybrid range of frequencies, ion cyclotron range of frequencies, current drive, RF technol