M.D. Shah, C.M. Marianno, and S.P. Khatri,
"The Neutron Detector Using Radiation Integrated Circuits,"
Poster. 2016 IEEE Symposium on Radiation Measurements and Applications, Berkeley, CA, 22-26 May 2016.
With the advancement in semiconductor technology, circuits
on the integrated circuit have become increasingly sensitive to
radiation damage and therefore, fail to function properly.
Researchers at Texas A&M University have converted this
disadvantage into an advantage for radiation detection
applications, by designing the RIC (Radiation Integrated Circuit).
This chip is designed with 2 types of sectors: radiation-sensitive
areas (RSAs) and radiation-hardened areas (RHAs). This paper
addresses the use of the RIC for neutron detection. The RSAs are
sensitive to charged-particle interactions, and so for neutron
detection, a medium (neutron-reactive material) is required to
generate charged-particles that are detected by the RSAs. To assess
the performance of neutron-reactive coatings on the RICs to detect
neutrons, MCNPX-based simulations were performed. The analysis
focused on the optimal yield of charged-particles at the interface
between the RIC and the neutron-reactive coating. Natural boron
(19.9% 10B), enriched boron
(96% 10B), boron carbide -
B4C (~75%10B) and
lithium fluoride - LiF (~24% 6Li),
were studied using MCNPX-based simulations. It was observed the
highest yield of charged-particles was measured for the enriched
boron, followed by, boron carbide, lithium fluoride and natural
boron. The optimal configuration for the RIC-based neutron detector
was observed for a 3-µm thick enriched boron coating. Analyses on
these materials will be presented in detail.
Associated Project(s):Radiation Detection Using Integrated Circuits