Modelling dust transport in tokamaksJ. D. Martin1, 2, M. Bacharis2, M. Coppins2, G. F. Counsell3 and J. E. Allen4
1 Max-Planck-Institut für extraterrestrische Physik - Postfach 1312, D-85741, Garching, Germany, EU
2 Blackett Laboratory, Imperial College London - Prince Consort Road, London, SW7 2BZ, UK, EU
3 EURATOM/UKAEA Fusion Association, Culham Science Centre - Abingdon, Oxon, OX14 3DB, UK, EU
4 University College Oxford - Oxford, OX1 4BH, UK, EU
received 11 April 2008; accepted in final form 11 August 2008; published September 2008
published online 15 September 2008
The DTOKS code, which models dust transport through tokamak plasmas, is described. The floating potential and charge of a dust grain in a plasma and the fluxes of energy to and from it are calculated. From this model, the temperature of the dust grain can be estimated. A plasma background is supplied by a standard tokamak edge modelling code (B2SOLPS5.0), and dust transport through MAST (the MegaAmp Spherical Tokamak) and ITER plasmas is presented. We conclude that micron-radius tungsten dust can reach the separatrix in ITER.
52.40.Hf - Plasma-material interactions; boundary layer effects.
52.55.Fa - Tokamaks, spherical tokamaks.
52.27.Lw - Dusty or complex plasmas; plasma crystals.
© EPLA 2008