We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Monte carlo study of MOSFET packaging, optimised for improved energy response: single MOSFET filtration.
- Authors
Othman, M. A. R.; Cutajar, D. L.; Hardcastle, N.; Guatelli, S.; Rosenfeld, A. B.
- Abstract
Monte Carlo simulations of the energy response of a conventionally packaged single metal-oxide field effect transistors (MOSFET) detector were performed with the goal of improving MOSFET energy dependence for personal accident or military dosimetry. The MOSFET detector packaging was optimised. Two different 'drop-in' design packages for a single MOSFET detector were modelled and optimised using the GEANT4 Monte Carlo toolkit. Absorbed photon dose simulations of the MOSFET dosemeter placed in free-air response, corresponding to the absorbed doses at depths of 0.07 mm (Dw(0.07)) and 10 mm (Dw(10)) in a water equivalent phantom of size 30 x 30 x 30 cm³ for photon energies of 0.015-2 MeV were performed. Energy dependence was reduced to within +60 % for photon energies 0.06-2 MeV for both Dw(0.07) and Dw(10). Variations in the response for photon energies of 15-60 keV were 200 and 330 % for Dw(0.07) and Dw(10), respectively. The obtained energy dependence was reduced compared with that for conventionally packaged MOSFET detectors, which usually exhibit a 500-700 % over-response when used in free-air geometry.
- Subjects
MONTE Carlo method; METAL oxide semiconductor field-effect transistors; FIELD-effect transistors; RADIATION dosimetry; RADIATION measurements
- Publication
Radiation Protection Dosimetry, 2010, Vol 141, Issue 1, p10
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncq144