Evaluation of commercial programmable floating gate devices as radiation dosimeters

R. Edgecock, J. Matheson, M. Weber, E. Giulio Villani, R. Bose, A. Khan, D.R. Smith, I. Adil-Smith, A. Gabrielli

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Programmable floating gate MOSFET transistors were tested with gamma radiation with doses up to approximately 100Gy (air equivalent), to evaluate their suitability as dosimeters in radiotherapy. After characterization and programming at different threshold voltages, the devices were irradiated and their Vgs shift with dose monitored in real time. Post-irradiation analysis was carried out to evaluate sensitivity, linearity, reproducibility and voltage threshold annealing. A subsequent re-programming phase followed by characterization was performed to asses their post-irradiation charge restoring capabilities. It was found that up to 73% of the initial maximum threshold voltage could be recovered. A sensitivity of up to 9 mV/Gy with an uncertainty of less than 1%, an excellent linearity up to the maximum programmable threshold voltage and low noise suggest the use of this technology for in vivo dosimetry applications.

Original languageEnglish
Article numberP02002
JournalJournal of Instrumentation
Volume4
Issue number2
DOIs
Publication statusPublished - 16 Feb 2009
Externally publishedYes

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Dosimeters
Threshold voltage
threshold voltage
floating
dosimeters
Voltage
Radiation
Dosimetry
evaluation
Evaluation
radiation
programming
Linearity
Irradiation
linearity
Dose
Programming
dosage
Radiotherapy
irradiation

Cite this

Edgecock, R., Matheson, J., Weber, M., Giulio Villani, E., Bose, R., Khan, A., ... Gabrielli, A. (2009). Evaluation of commercial programmable floating gate devices as radiation dosimeters. Journal of Instrumentation, 4(2), [P02002]. https://doi.org/10.1088/1748-0221/4/02/P02002
Edgecock, R. ; Matheson, J. ; Weber, M. ; Giulio Villani, E. ; Bose, R. ; Khan, A. ; Smith, D.R. ; Adil-Smith, I. ; Gabrielli, A. / Evaluation of commercial programmable floating gate devices as radiation dosimeters. In: Journal of Instrumentation. 2009 ; Vol. 4, No. 2.
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Edgecock, R, Matheson, J, Weber, M, Giulio Villani, E, Bose, R, Khan, A, Smith, DR, Adil-Smith, I & Gabrielli, A 2009, 'Evaluation of commercial programmable floating gate devices as radiation dosimeters', Journal of Instrumentation, vol. 4, no. 2, P02002. https://doi.org/10.1088/1748-0221/4/02/P02002

Evaluation of commercial programmable floating gate devices as radiation dosimeters. / Edgecock, R.; Matheson, J.; Weber, M.; Giulio Villani, E.; Bose, R.; Khan, A.; Smith, D.R.; Adil-Smith, I.; Gabrielli, A.

In: Journal of Instrumentation, Vol. 4, No. 2, P02002, 16.02.2009.

Research output: Contribution to journalArticle

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AU - Edgecock, R.

AU - Matheson, J.

AU - Weber, M.

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AU - Gabrielli, A.

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