Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] acdy_v1_0.gz(14 Kbytes)|
|Manuscript Title: TOPIC: a tokamak plasma impurities code.|
|Authors: T.A. Beu, F. Spineanu, M. Vlad, R.I. Campeanu, I.I. Popescu|
|Program title: TOPIC|
|Catalogue identifier: ACDY_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 36(1985)161|
|Programming language: Fortran.|
|Computer: CDC CYBER 170-720.|
|Operating system: NOS1P4 552/552.|
|RAM: 1K words|
|Word size: 64|
|Keywords: Tokamak, Plasma physics, Impurities, Diffusion equation, Coupled differential Equations, Three-diagonal block Matrix inversion, Magnetic confinement.|
Nature of problem:
In high temperature low density tokamak plasmas, radiation cooling by impurity atoms can be an important energy loss mechanism, since radiation is not reabsorbed. The coupled set of time-dependent diffusion equations for ionized tokamak plasma impurities is solved in conjunction with a simple model for neutral impurities, on the assumption of a cylindrical symmetry. The resultant density distributions are used in the subsequent computation of the related energy losses.
The set of coupled second order differential equations, describing the diffusion of impurities in the MHD approach, is discretized using a finite difference scheme. The resultant linear system, with a three- diagonal block matrix structure, is then solved by a special forward elimination - backward substitution technique.
About 6 s for the test run ouput.
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