Computer Programs
PSR-0273 FERD-PC.
FERD-PC, Interactive Multichannel Neutron and Gamma Spectrum Matrix Unfolding
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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| 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.
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.
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.
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.
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.[ top ]
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8. RELATED AND AUXILIARY PROGRAMS
FERD (PSR-0102).
PLOTFERD: Interactive Graphics Program for FERD-PC.
FERD (PSR-0102).
PLOTFERD: Interactive Graphics Program for FERD-PC.
PSR-0273/01
PLOTFERD Interactive Graphics Program[ top ]
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.
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.[ top ]
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.
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.[ top ]
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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 |
Keywords: gamma spectra, multi-channel analysers, neutron spectra, spectra unfolding.