Time dependent neutral gas transport in tokamak edge plasmasFunded under: EAEC-FUSION 12C
The effects of neutral particles on the edge plasma conditions play a key role in divertor and limiter physics. In computational models they are usually treated in steady state approximation. However, the characteristic transport time scale is comparable to the ion acoustic time scale. Thus neutral atoms relax to their steady state distributions much slower than electron temperature profiles along the fieldlines are established. A computational assessment of divertor or limiter dynamics requires ultimately an extension to time dependent algorithms. The numerical procedure in the EIRENE Monto Carlo code is presented. A first numerical study of ELMs in the ASDEX-Upgrade divertor plasma has been carried out and the results are briefly discussed.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 220-222 (1995) pp. 987-992
Record Number: 199510776 / Last updated on: 1995-07-12
Original language: en
Available languages: en