1. NAME AND TITLE
PLASMX: A Multigroup Ionization and Charge Exchange Cross-Section Code System for
Neutral Hydrogen Transport in Plasmas.
Los Alamos National Laboratory, Los Alamos, New Mexico.
3. CODING LANGUAGE AND COMPUTER
Fortran IV; CDC-6600/7600.
4. NATURE OF PROBLEM SOLVED
PLASMX provides multigroup cross sections for neutral hydrogen atom transport calculations in
Tokamak-type CTR plasmas. These cross sections are written to tape in a format specifically tailored
to the LANL neutron transport codes, but they can be written in any specified format.
5. METHOD OF SOLUTION
PLASMX generates multigroup cross sections on one of the output files in a standard DTF-IV
format suitable for one- and two-dimensional cylindrical discrete-ordinates transport codes such as
CCC-266/ONETRAN or CCC-195/TWOTRAN.
6. RESTRICTIONS OR LIMITATIONS
Variable dimensioning presently restricts the number of energy groups to 22, the number of spatial
regions to 10, and the number of Legendre polynomial moments to 7 (P6). Changes for user
applications are easily effected.
7. TYPICAL RUNNING TIME
A two-group, two-region, P3 calculation requires approximately 30 s on a CDC-7600 computer.
An 11-group, 10-region, P3 calculation requires approximately 30 min.
8. COMPUTER HARDWARE REQUIREMENTS
PLASMX is operable on the CDC 6600/7600 computers. It requires two system input/output units
and two output disks or tapes.
9. COMPUTER SOFTWARE REQUIREMENTS
A Fortran IV compiler is required.
J. E. Morel and B. R. Wienke, "PLASMX: Multigroup Ionization and Charge Exchange Cross-Section Code for Neutral Hydrogen Transport in Plasmas," LA-6661-MS (January 1977).
B. R. Wienke, "Mean, Mean - Square and Most - Probable Momentum for a Relative Maxwellian
Ensemble," American Journal of Physics Vol. 43, No. 4, April 1975.
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code and sample problem input and output.
12. DATE OF ABSTRACT
March 1984, updated December 1991.
KEYWORDS: MULTIGROUP CROSS SECTION PROCESSING; PLASMA