last modified: 09-MAY-1989 | catalog | categories | new | search |

IAEA0909 TOPIC-RUM.

TOPIC-RUM, Plasma Impurities in Tokamak Reactor by MHD Method

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1. NAME OR DESIGNATION OF PROGRAM:  TOPIC-RUM.
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2. COMPUTERS
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Program name Package id Status Status date
TOPIC-RUM IAEA0909/01 Tested 09-MAY-1989

Machines used:

Package ID Orig. computer Test computer
IAEA0909/01 CDC CYBER 720 CDC CYBER 830
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3. DESCRIPTION OF PROGRAM OR FUNCTION

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 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.
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4. METHOD OF SOLUTION

The set of coupled second order 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.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:  About 6s for the test run output.
IAEA0909/01
NEA-DB ran the two test cases included in this package  on a CDC CYBER 830 computer in less than 13 seconds of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

STRIMP - impurity evolution in Tokamak fusion reactor discharge.
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9. STATUS
Package ID Status date Status
IAEA0909/01 09-MAY-1989 Tested at NEADB
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10. REFERENCES:
IAEA0909/01, included references:
- T.A. Beu, F. Spineanu, M. Vlad, R.I. Campeanu and I.I. Popescu:
  TOPIC - A Tokamak Plasma Impurities Code.
  Reprint from "Computer Physics Communication", Vol. 36(2),
  pp. 161-176  (April 1985)
- User's Guide of the TOPIC Program (Detailed Input Specification).
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11. MACHINE REQUIREMENTS

High speed storage required : 0.7 Kwords for  the test run. Peripherals used: card reader, line printer, magnetic  disk.
IAEA0909/01
55,000 (octal) words of CDC CYBER 830 main storage.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA0909/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  NOS1P4 552/552.
IAEA0909/01
NOS2.5.1 (CDC CYBER 830).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The number of words required by the arrays used in the program, NW, is used by the system subprograms SYMLIB, CNMALF and LOCF for dynamic memory allocation, relative to the starting adress of the array A dimensioned in the main program. On computers which do not have dynamic memory allocation facilities the sequence
   CALL SYMLIB
   CALL CMMALF (NW+1,0,0,IA)
   LA=IA-LOCF (A(1))+1
should be replaced by
   LA=1
while the array A should be dimensioned according to NW.
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15. NAME AND ESTABLISHMENT OF AUTHORS

          T.A. Beu, F. Spineanu, M. Vlad
          Central Institute of Physics
          Bucharest-Magurele, Romania

          R.I. Campeanu
          University of Cluj-Napoca
          Department of physics
          3400 Cluj-Napoca, Romania

          I.I. Popescu
          University of Bucharest
          Department of Physics
          Bucharest-Magurele, Romania
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16. MATERIAL AVAILABLE
IAEA0909/01
File name File description Records
IAEA0909_01.001 Information file 46
IAEA0909_01.002 JCL and control information 11
IAEA0909_01.003 TOPIC-RUM source program 1128
IAEA0909_01.004 Sample case input 1 35
IAEA0909_01.005 Sample case input 2 44
IAEA0909_01.006 Sample output 443
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17. CATEGORIES
  • X. Magnetic Fusion Research

Keywords: diffusion equations, magnetohydrodynamics, plasma, tokamak reactors.