DocumentCode :
3835876
Title :
Numerical Simulations of Pillar Structured Solid State Thermal Neutron Detector: Efficiency and Gamma Discrimination
Author :
Adam M. Conway;Tzu F. Wang;Nimanlendu Deo;Chin L. Cheung;Rebecca J. Nikolic
Author_Institution :
Lawrence Livermore Nat. Lab., Livermore, CA, USA
Volume :
56
Issue :
5
fYear :
2009
Firstpage :
2802
Lastpage :
2807
Abstract :
This paper reports numerical simulations of a three-dimensionally integrated, Boron-10 (10B) and Silicon p+, intrinsic, n+ (PIN) diode micropillar array for thermal neutron detection. The inter-digitated device structure has a high probability of interaction between the Si PIN pillars and the charged particles (alpha and 7Li) created from the neutron-10B reaction. In this paper, the effect of both the 3-D geometry (including pillar width, separation and height) and energy loss mechanisms are investigated via simulations to predict the neutron detection efficiency and gamma discrimination of this structure. The simulation results are demonstrated to compare well with the experimental data available at this time, for 7- and 12-mum tall micropillar arrays. This indicates that upon scaling the pillar height, a high efficiency thermal neutron detector is possible.
Keywords :
"Numerical simulation","Solid state circuits","Neutrons","Gamma ray detection","Gamma ray detectors","Silicon","Diodes","Information geometry","Energy loss","Solid modeling"
Journal_Title :
IEEE Transactions on Nuclear Science
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.2009.2021474
Filename :
5280550
Link To Document :
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