last modified: 20-NOV-1990 | catalog | categories | new | search |

PSR-0273 FERD-PC.

FERD-PC, Interactive Multichannel Neutron and Gamma Spectrum Matrix Unfolding

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1. NAME OR DESIGNATION OF PROGRAM:  FERD-PC.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
FERD-PC PSR-0273/01 Tested 20-NOV-1990

Machines used:

Package ID Orig. computer Test computer
PSR-0273/01 IBM PC IBM PC
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3. DESCRIPTION OF PROGRAM OR FUNCTION

FERD-PC solves the integral equation which relates a measured pulse-height distribution and associated uncertainties to the true energy spectrum of the incident radiation. FERD-PC is a modified version of FERD, which is included  in PSR-0102. Several changes were made to include an interactive binning code, a flux integration code, and a plotting utility.
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4. METHOD OF SOLUTION

The FERD method uses constrained least-squares  and biased estimation to solve a discretized representation of the integral unfolding problem and to compute a 2-sigma confidence interval for the true energy spectrum. The mathematical method of FERD-PC differs from FERD only in that FERD-PC assumes no uncertainty in the response matrix, while FERD allows additional uncertainty by means of an upper and lower response matrix.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

FERD requires an accurate estimation of the actual detector response and the idealized detector response (detector resolution). The limit on the  size of the response is highly dependent on available computer memory. A 68 x 55 response matrix requires a minimum of 360 kilobytes of computer memory.
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6. TYPICAL RUNNING TIME

Running time depends most strongly on the size of the response matrix and the number of output files it generates. The sample problem used 212 seconds on an IBM PC/XT with  a math co-processor.
PSR-0273/01
The test case included in this package was executed by NEA-DB on an IBM PC/AT compatible computer in 79 seconds.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

FERD (PSR-0102).
PLOTFERD: Interactive Graphics Program for FERD-PC.
PSR-0273/01
PLOTFERD            Interactive Graphics Program
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9. STATUS
Package ID Status date Status
PSR-0273/01 20-NOV-1990 Tested at NEADB
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10. REFERENCES:
PSR-0273/01, included references:
- Brian D. Rooney:
  User's Manual for FERD-PC
  ORNL/TM-11028 (April 1989).
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11. MACHINE REQUIREMENTS

FERD is operable on IBM PC or compatibles running DOS version 2.1 or later. A minimum of 360k of available user memory is required, and a math coprocessor must be installed. FERD-PC has been run on DEC VAX II and IBM PS/2 computers. PLOTFERD  requires a HP 7475A or equivalent plotter.
PSR-0273/01
Main storage requirements on an IBM PC/AT are about 240 Kbytes for FERD-PC and 140 Kbytes for PLOTFERD.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
PSR-0273/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

FERD-PC uses the  Microsoft FORTRAN (Version 4.01) compiler, and the Microsoft Quickbasic compiler was used for PLOTFERD.
PSR-0273/01
The program ran under MSDOS version 4.2. The compilers  Microsoft FORTRAN version 5 and Microsoft Quickbasic version 4 were  used.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.
Contributed by: Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.
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16. MATERIAL AVAILABLE
PSR-0273/01
File name File description Records
PSR0273_01.001 NEA DATA BANK information file 86
PSR0273_01.002 PFERD compressed archive 0
PSR0273_01.003 README file 14
PSR0273_01.004 DOS file-names 2
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17. CATEGORIES
  • O. Experimental Data Processing

Keywords: gamma spectra, multi-channel analysers, neutron spectra, spectra unfolding.