We have inodellrd the tr:msport of puticles :ind energy through a tokamak SOL near the neutrdizer plate. The electron kinetichon lluid code FPI and a two-fluid code were employed for this study. Becnuse of the electron time scale. it wwld ~ake a very long time to rach strndy state with the kinetic
Kinetic Modelling of Plasma Near the Neutralizer Plate in a Tokamak Divertor
β Scribed by Z. Abou-Assaleh; R. Marchand; J. P. Matte; T. W. Johnston; K. J. Parbhakar
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 232 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0005-8025
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β¦ Synopsis
An electron kinetic code is used to simulate lonqitudinal transport and recycling near the neutralizer plate in a divertor plasma. In addition to the standard features, such as e-β’ and e-i Coulomb collisions, transport, ion motion, and a self-consistent eleCtric field, the code now accounts for ionization, excitation, and recycling of hydroqen near the plate.
The kinetic results are compared with those of a one-dimensional, two-tewerature fluid code. Sow irmlications of these results for recycling and impurity control in tokamaks are also discussed.
Ions and neutrals are treated as fluids.
π SIMILAR VOLUMES
The neutrals in a tokamak divertor in the so-called "detached" mode of operation may be in a kinetic regime (long mean free path) in some regions and in a fluid regime (short mean free path) elsewhere. For example, a kinetic description is necessary in the thin ionization front, while the cold neutr
## Abstract The coupled dynamics and kinetics between gas and plasma in the sheath region in the divertor is studied by means of a oneβdimensional Particle in CellβDirect Simulation Monte Carlo (PICβDSMC) model. In particular, the electronβinduced vibrational excitation/relaxation of H2 molecules a