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NEA-0583 MEDUSA-PIJ.

MEDUSA-PIJ, 1-D Thermohydraulic Analysis of Laser Driven Plasma

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1. NAME OR DESIGNATION OF PROGRAM:  MEDUSA-PIJ.
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2. COMPUTERS
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Program name Package id Status Status date
MEDUSA-PIJ NEA-0583/01 Tested 01-DEC-1981

Machines used:

Package ID Orig. computer Test computer
NEA-0583/01 IBM 3033 IBM 3033
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3. NATURE OF PHYSICAL PROBLEM SOLVED

This code calculates one-dimensional hydrodynamic and thermodynamic behaviour such as implosion and  burning process of laser-driven plasma.
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4. METHOD OF SOLUTION

In the one-dimensional Lagrangian hydro-burn code 'MEDUSA', the neutrons emitted by D-T and D-D reactions are assumed to escape freely from the system without further interaction. The assumption is not practicable, however, in plasmas  highly compressed by laser irradiation. In the modified code MEDUSA-PIJ, the energy deposition due to the emitted neutrons is calculated by a collision probability method. The total energy deposition is considered in the energy balance equation of the system at each time step,  and a hydrodynamic equation is solved.
The spectrum of neutrons escaping from the fuel spheres is calculated by a neutron slowing-down equation derived under the two-collision model.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The core storage required is 188k words. The maximum number of Lagrangian meshes is 150 and the maximum number of regions used in the collision probability  calculation is 10.
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6. TYPICAL RUNNING TIME

The running time is about 60 minutes for the case with 30 Lagrangian meshes and 10 regions for calculating collision probabilities.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS:  CALCOMP plotting package.
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9. STATUS
Package ID Status date Status
NEA-0583/01 01-DEC-1981 Tested at NEADB
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10. REFERENCES
NEA-0583/01, included references:
- H. Takano and Y. Ishiguro:
  MEDUSA-PIJ, A Code for One-Dimensional Laser Fusion Analysis
  Taking Account of Neutron Heating Effect.
  JAERI-M 8186 (March 1979)
- J.P. Christiansen, D.E.T.F. Ashby and K.V. Roberts:
  MEDUSA - A One-Dimensional Laser Fusion Code.
  Reprint from Computer Physics Communications  7(1974) 271-287
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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0583/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  FACOM OS.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:  NAMELIST is used.
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15. NAME AND ESTABLISHMENT OF AUTHOR

       H.Takano and Y. Ishiguro
       Division of Reactor Engineering
       Tokai Research Establishment
       JAERI
       Japan
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16. MATERIAL AVAILABLE
NEA-0583/01
File name File description Records
NEA0583_01.001 INFORMATION 60
NEA0583_01.002 JOB CONTROL 95
NEA0583_01.003 ASSEMBLER ROUTINES (ENCODE,SIMULATION) 82
NEA0583_01.004 MEDUSA FORTRAN SOURCE 13525
NEA0583_01.005 DUMMY PLOTTING ROUTINES 28
NEA0583_01.006 SAMPLE PROBLEM INPUT 65
NEA0583_01.007 SAMPLE PROBLEM OUTPUT 5241
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17. CATEGORIES
  • X. Magnetic Fusion Research

Keywords: Lagrange equations, fusion reactions, hydrodynamics, neutron spectra, one-dimensional, plasma, thermodynamics, thermonuclear reactions.