Computer Programs

NEA-0583 MEDUSA-PIJ.

NEA-0583 MEDUSA-PIJ.

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

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: MEDUSA-PIJ.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

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.