IAEA0943 STRIMP.

STRIMP, Impurity Evolution in Tokamak Fusion Reactor Discharge

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: STRIMP.

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2. COMPUTERS

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Program name	Package id	Status	Status date
STRIMP	IAEA0943/01	Tested	16-MAR-1989

Machines used:

Package ID	Orig. computer	Test computer
IAEA0943/01	CDC CYBER 720	CDC CYBER 830

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3. DESCRIPTION OF PROGRAM OR FUNCTION

The code computes the stationary radial profiles for each impurity stage of ionization and/or their time evolution, taking into account diffusion, ionization and recombination processes occuring in each point of the plasma of a tokamak discharge.

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4. METHOD OF SOLUTION

The system of partial differential equations representing the transport equations for the density of the impurity ions in each ionization stage is solved using the cubic B-spline approximation of the unknown functions. The time evolution is determined by a predictor-corrector algorithm.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The tokamak plasma is assumed to be axisymmetric and to have a circular meridional cross section.

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6. TYPICAL RUNNING TIME

The main computational sequence of the program consisting in loading the matrix of the system and finding the solution needs about 1 s.

IAEA0943/01

The test case has been run by NEA-DB on a CDC CYBER 830 computer in 500 seconds of CPU time.

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7. UNUSUAL FEATURES OF THE PROGRAM

Due to the uncertainties in the physical theory of impurity diffusion, the code is specially structured to allow an easy implementation of any new transport model. The formulae of the rates of the atomic processes can be modified as well. The code provides the adaptation of the necessary input information and can use different types of boundary conditions.

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8. RELATED AND AUXILIARY PROGRAMS

TOPIC-RUM: Plasma impurities in Tokamak reactor by MHD method.

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9. STATUS

Package ID	Status date	Status
IAEA0943/01	16-MAR-1989	Tested at NEADB

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10. REFERENCES:

IAEA0943/01, included references:

- F. Spineanu, M. Vlad and I.I. Popescu:
  STRIMP-Program for Studying the Impurity Evolution
  in Tokamak Plasma.
  Reprint from "Computer Physics Communication, Vol. 41,
  pp. 155-168  (1986)
- User's Guide.

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11. MACHINE REQUIREMENTS: Line printer.

IAEA0943/01

To run the test case on a CDC CYBER 830 computer, 73,000 (octal) words of main storage are required.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
IAEA0943/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: NOS1P4 552/552.

IAEA0943/01

NOS2.5.1 (CDC CYBER 830).

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

          Florin Spineanu, Madalina Vlad
          Institute of Physics and Technology of
          Radiation Devices
          Bucharest, Magurele, MG-7 Romania

          Ioan-Iovit Popescu
          University of Bucharest
          Romania

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16. MATERIAL AVAILABLE

IAEA0943/01

File name	File description	Records
IAEA0943_01.001	Information file	42
IAEA0943_01.002	JCL and control information	8
IAEA0943_01.003	STRIMP source program	1257
IAEA0943_01.004	Sample problem output	1005

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17. CATEGORIES

X. Magnetic Fusion Research

Keywords: fusion reactions, fusion reactors, magnetohydrodynamics, plasma, tokamak reactors.