Ion Kinetic Transport: Grid computing has allowed to remove the doubtful approximations that are used in the customary modelling tools, i.e., we do not assume that transport is diffusive, we do not perform any average on magnetic surfaces and we can perform estimates for arbitrary mean free paths, being therefore a method valid for low collisonality plasmas, as the ones that will be present in a fusion reactor. These achievements could be done by following a huge number of independent particles during all their life in the plasma.
MaRaTra: A huge number of independent calculations are needed for optimizing the launcher and the receiver. This problem structure is perfect for grid computing: a bunch of rays is running in every node of the grid.
Stellarator Optimization. Different stellarator configurations can be studied in separated nodes of the grid. A genetic algorithm chooses the best one regarding a target function. Different target function can be implemented within the algorithm.
4. Conclusions / Future plans
The Fusion VO was used for MaRaTra and Ion Kinetic Transport. The Stell. Opt. and the Relfletometry applications run in the Russian Grid. The CPU time for a single case is about 2 years. The future plans involve the enhancement of Ion Kinetic Transport and MaRaTra applications with new equations and the exploitation of Stell. Opt.
The experience in using the grid and the middleware will be exploited in Euforia Project. New applications will be ported and Kepler will be used for complex workflows
Provide a set of generic keywords that define your contribution (e.g. Data Management, Workflows, High Energy Physics)
1. Short overview
Modelling is becoming a key activity in fusion research. Several applications have been chosen as demonstrative examples of the grid capabilities:
Ion Kinetic Transport. Study of ion trajectories in tokamak and stellarator plasmas.
MaRaTra: Massive Ray Tracing. Plasma heating modelling within WKB theory implies the use of large number of rays.
Stellarator optimization. Allows the searching of optimal magnetic configurations.
Plasma reflectometry optimisation. Application in development phase.
If demonstration is requested please explain what visual or interactive aspects of the contribution necessitate a demonstration rather than a presentation or poster?
A projection of the results will be shown during the presentation.
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