The Woodruff School

SUMMARY

A pulse height tally response expansion (PHRE) method is developed for detectors. By expanding the incident flux of the detector, a set of response functions is constructed via Monte Carlo estimators for pulse height tallies. B-spline functions are selected for the expansion of the incident flux in the energy phase space. Response functions are generated for a CsI(Na) crystal using an energy dependent B-spline form of the PHRE method. The method is verified for several incident flux spectra on the crystal. Results of the energy dependent B-spline form of the PHRE method are compared to the solutions generated using MCNP5. The method is shown to be several orders faster than MCNP5 while maintaining paralleled accuracy.

SUBJECT:	M.S. Thesis Presentation

BY:	Travis Zipperer

TIME:	Monday, May 16, 2011, 1:00 p.m.

PLACE:	Boggs, 3-47

TITLE:	Energy Dependent Pulse Height Tally Response Expansion Method for Application in Detector Problems

COMMITTEE:	Dr. Farzad Rahnema, Chair (NRE) Dr. Dingkang Zhang (NRE) Dr. Glenn Sjoden (NRE)

SUMMARY A pulse height tally response expansion (PHRE) method is developed for detectors. By expanding the incident flux of the detector, a set of response functions is constructed via Monte Carlo estimators for pulse height tallies. B-spline functions are selected for the expansion of the incident flux in the energy phase space. Response functions are generated for a CsI(Na) crystal using an energy dependent B-spline form of the PHRE method. The method is verified for several incident flux spectra on the crystal. Results of the energy dependent B-spline form of the PHRE method are compared to the solutions generated using MCNP5. The method is shown to be several orders faster than MCNP5 while maintaining paralleled accuracy.