title: Capacitance-Based Dosimetry of Co-60 Radiation using Fully-Depleted Silicon-on-Insulator Devices.
abstract: The capacitance based sensing of fully-depleted silicon-on-insulator (FDSOI) variable capacitors for Co-60 gamma radiation is investigated. Linear response of the capacitance is observed for radiation dose up to 64 Gy, while the percent capacitance change per unit dose is as high as 0.24 %/Gy. An analytical model is developed to study the operational principles of the varactors and the maximum sensitivity as a function of frequency is determined. The results show that FDSOI varactor dosimeters have potential for extremely-high sensitivity as well as the potential for high frequency operation in applications such as wireless radiation sensing.
authors.affiliation: Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St. SE, Minneapolis, MN 55455.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Li
authors.affiliation: Biophysical Sciences and Medical Physics Program, University of Minnesota, 424 Harvard St SE, Minneapolis, MN 55455.
authors.forename: Warren M
authors.initials: WM
authors.lastname: Porter
authors.affiliation: Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St. SE, Minneapolis, MN 55455.
authors.forename: Rui
authors.initials: R
authors.lastname: Ma
authors.affiliation: Department of Radiation Oncology, University of Minnesota Medical Center, Fairview, 500 Harvard St. SE, Minneapolis, MN 55455.
authors.forename: Margaret A
authors.initials: MA
authors.lastname: Reynolds
authors.affiliation: Department of Radiation Oncology, University of Minnesota Medical Center, Fairview, 500 Harvard St. SE, Minneapolis, MN 55455.
authors.forename: Bruce J
authors.initials: BJ
authors.lastname: Gerbi
authors.affiliation: Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St. SE, Minneapolis, MN 55455.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Koester