NDLI: Pillar structured thermal neutron detector

Content Provider	IEEE Xplore Digital Library
Author	Nikolic, R.J. Conway, A.M. Reinhardt, C.E. Graff, R.T. Wang, T.-F. Deo, N. Chin Li Cheung
Copyright Year	2008
Description	Author affiliation: Univ. of Nebraska - Lincoln, Lincoln, NE, USA (Deo, N.; Chin Li Cheung) \|\| Lawrence Livermore Nat. Lab., Lawrence, CA, USA (Nikolic, R.J.; Conway, A.M.; Reinhardt, C.E.; Graff, R.T.; Wang, T.-F.)
Abstract	This work describes an innovative solid state device structure that leverages advanced semiconductor fabrication technology to produce an efficient device for thermal neutron detection which we have coined the ¿Pillar Detector¿. State-of-the-art thermal neutron detectors have shortcomings in simultaneously achieving high efficiency, low operating voltage while maintaining adequate fieldability performance. By using a three dimensional silicon PIN diode pillar array filled with isotopic $^{10}boron$ $(^{10}B),$ a high efficiency device is theoretically possible. Here we review the design considerations for going from a 2-D to 3-D device and discuss the materials trade-offs. The relationship between the geometrical features and efficiency within our 3-D device is investigated by Monte Carlo radiation transport method coupled with finite element drift-diffusion carrier transport simulations. To benchmark our simulations and validate the predicted efficiency scaling, experimental results of a prototype device are illustrated. The fabricated pillar structures reported in this work are composed of 2 ¿m diameter silicon pillars with a 2 ¿m spacing and pillar height of 12 ¿m. The pillar detector with a 12 ¿m height achieved a thermal neutron detection efficiency of 7.3% at a reverse bias of - 2 V.
Starting Page	2361
Ending Page	2364
File Size	1704921
Page Count	4
File Format	PDF
ISBN	9781424421855
DOI	10.1109/ICSICT.2008.4735063
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Neutrons Detectors Silicon Solid state circuits Fabrication Low voltage Boron Monte Carlo methods Finite element methods Solid modeling
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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