Volume 83, Number 6, September 2008
Article Number 65001
Number of page(s) 5
Section Physics of Gases, Plasmas and Electric Discharges
Published online 15 September 2008
EPL, 83 (2008) 65001
DOI: 10.1209/0295-5075/83/65001

Modelling dust transport in tokamaks

J. 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