# Theoretical and numerical studies in magnetic fusion. Progress report, 1992--1993 [electronic resource].

- Published:
- Washington, D.C. : United States. Dept. of Energy, 1993.

Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 11 pages : digital, PDF file
- Additional Creators:
- Yale University, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

##### Access Online

- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- This past year has been devoted to the development of analytic and numerical kinetic theory for the edge physics problem in Tokamaks. For the charged particles the general formal problem involves the solution of the system of coupled drift-kinetic equations. Near a diverter the set of equations must be supplemented by Bolttzmann equations for the uncharged species, and the situation is complicated by wall chemistry and sheaths. The full problem is clearly beyond the ability of the current best in available analytic and numerical methods. Thus we have begun by considering simplified model kinetic theory models in order to explore phenomena and develop analytic and numerical techniques. The first effort was to use the kinetic equation of discharge theory, which while not quantitative, provides the easiest problem. Next we have completely solved a kinetic theory problem using the Lorentz gas approximation for the collision term. This has provided analytic and computational tools for use in dealing with the kinetic equation including energy diffusion. In order to deal most simply with energy diffusion we have developed a simple model collision terms C{sub j} which conserves number, and for self collisions also conserves energy and momentum. It lends itself to rapid accurate computation, The associated solutions of the kinetic equation should be semiquantitative and provide a useful tool for the rapid exploration of edge phenomena and the development of first approximations required for the itterative solution of the full kinetic equation.
- Report Numbers:
- E 1.99:doe/er/53240--5

doe/er/53240--5 - Subject(s):
- Other Subject(s):
- Note:
- Published through SciTech Connect.

10/01/1993.

"doe/er/53240--5"

"DE94000536" - Type of Report and Period Covered Note:
- Annual; 01/01/1992 - 12/31/1993
- Funding Information:
- FG02-86ER53240

View MARC record | catkey: 14745619