Modeling of Erosion and Deposition

Numerical codes are used to predict fuel retention and the lifetime of target plates of ITER. Such a code is the three dimensional Monte-Carlo ERO [46,47] which was developed originally to model the impurity transport in TEXTOR (ERO-TEXTOR). Meanwhile, various divertor configurations such as ASDEX, JET and ITER (program versions ERO-ASDEX, ERO-JET and ERO-ITER) as well as the linear plasma device PISCES have been implemented. 

Such a code needs benchmarks with experimental data. Furthermore, improvements in the underlying data bases on atomic and molecular data and surface processes have to be implemented. The most recent developments are  

Implementation of new rate coefficients for the methane reaction chain. 

The consideration of higher hydrocarbons was introduced. The former version of the ERO code considered only the methane family CHy whereas higher hydrocarbons CxHy were not included. Especially at low electron temperatures as they can develop in the divertor higher hydrocarbons become more and more important [54]. Thus, the higher hydrocarbons C2Hy and C3Hy are now included in the code. 

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Data needs and issues to be addressed related to modeling of erosion and deposition ... 

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