ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Initial testing of a new, commercially available, thermoluminescent dosimetry system is reported. The radiation detectors consist of two-dimensional arrays of 104 CaF2:Mn dosimeters, deposited on flexible polyimide sheets. The spatial resolution is 3 mm, and the combined thickness of the dosimeters and the substrate is 185 μm. Exposed sheets are processed by laser heating. This system is compatible with intense, pulsed Bremsstrahlung fields and electronics hardness testing. A two-step calibration procedure is described. In spatial uniformity tests at 66 Gy the detectors exhibited random fluctuations of 1%–3% superposed on broad spatial drifts of ∼±5%. Reproducibility for strips of 288 elements, cut from sheets and given absorbed doses of 100 Gy, was ∼2%. For absorbed doses in the 10 Gy–1.5 kGy range, response vs exposure curves show reasonable features of linearity, supralinearity, and saturation for CaF2:Mn phosphor. Small systematic effects (〈7%) can be observed for sheets and strips stacked during exposure; these effects are explained by radiation transport calculations and impact the dosimetric technique.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1144558
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