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[Program Service | Recent programs]

CCC-0618 PTRAN. (Abstract last modified 16-DEC-1994)


PTRAN, Proton Transport for 50 to 250 MeV by Monte-Carlo

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Abstract Table of Contents:

NAME | COMPUTER | PROBLEM | SOLUTION | RESTRICTIONS | CPU | FEATURES | AUXILIARIES | STATUS | REFERENCES | REQUIREMENTS | LANGUAGE | OPERATING SYSTEM | OTHER RESTRICTIONS | AUTHOR | MATERIAL | CATEGORIES |

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1. NAME OR DESIGNATION OF PROGRAM - PTRAN. 


2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name         Package-ID  Status
PTRAN                CCC-0618/01 Tested

Machines used:
Package-ID     Orig.Computer                       Test Computer
CCC-0618/01    PC-80386                            PC-80486

3. DESCRIPTION OF PROGRAM OR FUNCTION - PTRAN, Version 1.1, uses a Monte Carlo program to calculate the transport of proton beams through extended media. The PTRAN code uses 50 to 250 MeV beams through water phantoms. Multiple scattering and Coulomb interaction energy loss mechanisms are taken into account along with nonelastic nuclear interactions. PTRAN calculates deposition of energy as a function of depth and radial distance from the beam, energy spectra of the primary protons as function of depth. Both 1 and 3 dimensional calculations are available.


4. METHOD OF SOLUTION - The PTRAN system uses several cross-section preparation programs and two main codes, PTRAN3D and PTRAN1D. The heart of the calculations is the Monte Carlo model which is based on the condensed-random-walk method (BERGER, 1963), and takes into account the following types of events occurring in successive short track segments: (a) energy-loss straggling in Coulomb collisions with atomic electrons, (b) multiple-scattering deflections due to elastic scattering by atoms, and (c) energy loss in nonelastic nuclear reactions. Data preparation programs facilitate the sampling of energy losses (VAVILOV, 1957) and angular deflections (MOLIERE, 1948). The initial proton stopping powers and ranges in water use PSTAR (NISTIR 4999, RSIC PSR-330).


5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - The codes PTRAN1D (PTRAN1DX & PTRAN1DY) and PTRAN3D are memory intensive, and need 7.5 Mbytes of RAM to execute. The support codes, data conversion and preparation codes (PTSUM, PARAM4, MPREP, VPREP, MCON, VCON) need 4 Mbytes RAM. The code PTRAN3D ran an example that took 56 minutes on a 80486/87 50 MHz machine. The math co-processor is mandatory with the executables supplied which used the Lahey Fortran F77L3 compiler and Phar Lap DOS Extender/Linker.


6. TYPICAL RUNNING TIME - Using the 80486/87 50 MHz PC, the PTRAN3D took 56 minutes of run time, the PTRAN1D took 35 minutes. On a 80386/87 33 MHz PC, all the data preparation programs were run using less than a minute, including the interactive requests for parameter input.

CCC-0618/01:

The test case included in this package was executed on a 66-MHz PC/80486. Run times for the main programs were: 42 minutes for PTRAN3D; 26 minutes for PTRAN1D.


7. UNUSUAL FEATURES OF THE PROGRAM - 


8. RELATED AND AUXILIARY PROGRAMS - 


9. STATUS
CCC-0618/01: 16-DEC-1994 Tested at NEADB


10. REFERENCES  - 
- M.J. Abramowitz and I.A. Stegun: 
  Handbook of Mathematical Functions 
  National Bureau of Standards Applied in Computational Series 55 
  (1964). 
- M.J. Berger: 
  Monte Carlo Calculation of the Penetration and Diffusion of 
  Charged Particle 
Methods in Computational Physics, Vol. 1, p. 135, Academic Press, N.Y. (1963).
- M.J. Berger: 
ESTAR, PSTAR, and ASTAR - Computer Codes for calculating Stopping Power and Range Tables for Electrons, Protons, and Helium Ions,
  National Institute of Standards and Technology Report, 
  NISTIR 4999, (1992) (RSIC PSR-330). 
- H.A. Bethe: 
  Moliere's Theory of Multiple Scattering 
  Phys. Rev. 89,1256 (1953). 
- D. Kahaner, C. Moler, S.Nash: 
  Numerical Methods and Software 
  Prentice-Hall (1989). 
CCC-0618/01:
- M.J. Berger:
  Proton Monte Carlo Transport Program PTRAN
  NISTIR 5113 (January 1993).


11. MACHINE REQUIREMENTS - The executable codes were compiled and linked using Lahey F77L3/EM32 version 5.0 which requires a 80386 w/80387 math co-processor or better. The PTRAN1D and PTRAN3D required 7.5 Mbytes of RAM to run while the other executables need less than 3.5 Mbytes RAM. No special graphics monitor or printer is necessary. The total set of codes with executables, input files, and output files will occupy at least 15 Mbytes of hard disk space.

CCC-0618/01:

PTRAN was installed by NEA-DB on a DELL 466/L PC with a 66-MHz 80486 processor and 16 Mbytes of RAM.


12. PROGRAMMING LANGUAGE(S) USED -
CCC-0618/01: FORTRAN-77 


13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - MS-DOS version 3.3 or higher is required. The memory requirements of several Mbytes of RAM require DOS Extender software or equivalent to access the memory above 640 Kbyte. The Lahey F77L3/EM32 version 5.01 with Phar Lap's DOS Extender was used to compile and link the executables included in the distribution diskettes. When running these executable programs there needs to be access on the hard drive to a error file F77L3.EER supplied by Lahey and included in the diskettes.

CCC-0618/01:

Installation at NEA-DB was done under MS-DOS Ver.6.2. The source codes were compiled using the Lahey F77L-EM/32 FORTRAN compiler version 5.20.


14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - 


15. NAME AND ESTABLISHMENT OF AUTHORS - 
Contributed by: 
                Radiation Shielding Information Center 
                Oak Ridge National Laboratory 
                Oak Ridge, Tennessee, U. S. A. 
Developed by: 
                National Institute of Standards (NIST) 
                Gaithersburg, Maryland 


16. MATERIAL AVAILABLE -
CCC-0618/01:
CCC0618_01.001    Information file                                  203 records
CCC0618_01.002    RSIC information file                             154 records
CCC0618_01.003    PARAM4 Fortran source code                        508 records
CCC0618_01.004    PARAM4 executable file                              0 records
CCC0618_01.005    Composition data for water                          3 records
CCC0618_01.006    Stopping-power and range table for water           70 records
CCC0618_01.007    Total nonelastic X-sections for oxygen              5 records
CCC0618_01.008    Output table, Grid 1                              374 records
CCC0618_01.009    Output table, Grid 2                              474 records
CCC0618_01.010    Output table, Grid 3                              702 records
CCC0618_01.011    Output table, Grid 4                             1184 records
CCC0618_01.012    Output table, Grid 5                             2178 records
CCC0618_01.013    Output array for VPREP4 and MPREP4, Grid 2        220 records
CCC0618_01.014    Output array for VPREP4 and MPREP4, Grid 3        334 records
CCC0618_01.015    Output array for VPREP4 and MPREP4, Grid 4        575 records
CCC0618_01.016    Output for PTRAN1D, PTRAN1DX or PTRAN3D, Gd2      201 records
CCC0618_01.017    Output for PTRAN1D, PTRAN1DX or PTRAN3D, Gd3      309 records
CCC0618_01.018    Output for PTRAN1D, PTRAN1DX or PTRAN3D, Gd4      525 records
CCC0618_01.019    VPREP4 Fortran source code                       2965 records
CCC0618_01.020    VPREP4 executable file                              0 records
CCC0618_01.021    VCON4 Fortran source code                          31 records
CCC0618_01.022    VCON4 executable file                               0 records
CCC0618_01.023    VSAMP4 Fortran source code                        132 records
CCC0618_01.024    VSAMP4 executable file                              0 records
CCC0618_01.025    VSUM4 Fortran source code                         204 records
CCC0618_01.026    VSUM4 executable file                               0 records
CCC0618_01.027    Output file for VCON4, Grid 2                    5291 records
CCC0618_01.028    Output file for VCON4, Grid 3                   12176 records
CCC0618_01.029    Output file for VCON4, Grid 4                   32900 records
CCC0618_01.030    MPREP4 Fortran source code                        337 records
CCC0618_01.031    MPREP4 executable file                              0 records
CCC0618_01.032    MCON4 Fortran source code                          30 records
CCC0618_01.033    MCON4 executable file                               0 records
CCC0618_01.034    MSAMP4 Fortran source code                        139 records
CCC0618_01.035    MSAMP4 executable file                              0 records
CCC0618_01.036    Reduced deflection angles for Moliere distr.       28 records
CCC0618_01.037    Moliere expansion coefficients f(1)               160 records
CCC0618_01.038    Moliere expansion coefficients f(2)               164 records
CCC0618_01.039    Output file for MCON4, Grid 2                    7853 records
CCC0618_01.040    Output file for MCON4, Grid 3                   11957 records
CCC0618_01.041    Output file for MCON4, Grid 4                   20633 records
CCC0618_01.042    PTRAN3D Fortran source file                       689 records
CCC0618_01.043    PTRAN3D executable file                             0 records
CCC0618_01.044    Arrays used for sampling from Gaussian distr      836 records
CCC0618_01.045    Output from test run                             2348 records
CCC0618_01.046    Auxiliary output for testing run                   16 records
CCC0618_01.047    PTRAN1D Fortran source code                       607 records
CCC0618_01.048    PTRAN1D executable file                             0 records
CCC0618_01.049    PTRAN1DX Fortran source code                      690 records
CCC0618_01.050    PTRAN1DX executable file                            0 records
CCC0618_01.051    PTRAN1DY Fortran source code                      594 records
CCC0618_01.052    PTRAN1DY executable file                            0 records
CCC0618_01.053    PTSUM Fortran source code                         308 records
CCC0618_01.054    PTSUM executable file                               0 records
CCC0618_01.055    Output table from test run                         71 records
CCC0618_01.056    Output array from test run                         37 records
CCC0618_01.057    Message errors from Lahey compiler                  0 records
CCC0618_01.058    Boundary information file                          31 records
CCC0618_01.059    DOS file-names                                     58 records


17. CATEGORIES  - 

- J.  Gamma Heating and Shield Design


Keywords: COULOMB FIELD, INELASTIC SCATTERING, MONTE CARLO METHOD, PROTONS, TRANSPORT

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