Modelling of impurity transport and plasma wall interaction at linear ...
Modelling of impurity transport and plasma wall interaction at linear ...
Modelling of impurity transport and plasma wall interaction at linear ...
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Particularities for <strong>linear</strong> devices<br />
Elastic collisions with residual gas (D 2 )<br />
- example 1<br />
Different impact energies for molecular ions (D + , D 2+ , D 3+ )<br />
Be carbide form<strong>at</strong>ion (suppressing chemical erosion <strong>of</strong> C)<br />
Tracking <strong>of</strong> metastable st<strong>at</strong>e (MS) in Be<br />
- example 2<br />
Bohm diffusion<br />
Physical effects implemented for <strong>linear</strong> devices<br />
can be relevant for tokamaks as well!<br />
Technical issues:<br />
o Geometry, target, Be oven, …<br />
o Plasma parameters (3D) - fitting formulas for radial <strong>and</strong> axial pr<strong>of</strong>iles<br />
o Electric field (3D)<br />
o Target biasing<br />
o . . .<br />
02/09/2010 D.Borodin | Oak Ridge WS | Forschungszentrum Jülich<br />
No 7
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