A comparison of experiment, CEPXS/ONETRAN, TIGERP, and QUICKE2 net electron emission coefficients for various bremsstrahlung spectra

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6224757

Ballard, W P; Lorence, Jr, L J; Snowden, D P; van Lint, V A.J.; Beale, E S

This work compares a carefully designed experiment with the predictions of four different codes (CEPXS/ONETRAN, TIGERP, TIGER and QUICKE2) for the complex bremsstrahlung spectra typical of very intense pulsed power x-ray generators. Accurate calculation of net photon-induced electron emission yields at material interfaces using Monte Carlo codes can be particularly difficult if the forward and reverse partial yields are of similar magnitudes. In such a circumstance, the statistical error in the Monte Carlo solution (TIGER or TIGERP) must be kept to a minimum to accurately resolve the difference. CEPXS/ONETRAN is a new deterministic coupled electron/photon transport code that is faster than Monte Carlo and is not subject to statistical error. QUICKE2 evaluates an analytical approximation and is also much less expensive to run than the Monte Carlo codes. The comparison of net yields is a sensitive test of the relative accuracy and efficiency of these various codes. We find that all of the codes except QUICKE2 substantially agree with the experiments for the forward net yields. Howver, for reverse net yields from high-Z materials, all the codes overpredict relative to measurements.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Mission Research Corp., San Diego, CA (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6224757
• Report Number(s): SAND-87-0292C; CONF-870724-16; ON: DE87012370
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990220* -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
BREMSSTRAHLUNG
C CODES
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
COMPUTER CODES
DATA
DATA ANALYSIS
ELECTROMAGNETIC RADIATION
ELECTRON EMISSION
EMISSION
EXPERIMENTAL DATA
INFORMATION
MONTE CARLO METHOD
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
PHOTOEMISSION
Q CODES
RADIATIONS
SECONDARY EMISSION
T CODES
THEORETICAL DATA
X-RAY EMISSION ANALYSIS