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Dosimetric properties of radiophotoluminescent glass detector in low-energy photon beams
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10.1118/1.4747261
/content/aapm/journal/medphys/39/10/10.1118/1.4747261
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/39/10/10.1118/1.4747261
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of a portion of the RGD readout system.

Image of FIG. 2.
FIG. 2.

Photographs of the model GD-301 RGD and plastic holder. The size of GD-301 is 1.5 mm in diameter and 8.5 mm in length.

Image of FIG. 3.
FIG. 3.

Block diagram of the readout system (Fig. 2 of Ref. 6). The RGD is excited by a pulsed ultraviolet laser, and photoluminescence light is measured by the system. The readout is then corrected with reference glass calibrated in terms of the absorbed dose with 137Cs gamma-ray source.

Image of FIG. 4.
FIG. 4.

Schematic diagram of readout magazine. (See Ref. 10.) The readout magazine has a gap of 1.6–1.7 mm against the 1.5 mm diameter of the RGD.

Image of FIG. 5.
FIG. 5.

Experimental configuration at PF in KEK.

Image of FIG. 6.
FIG. 6.

Measurement setup for dose response of RGDs. Five RGDs were horizontally set to slits of styrofoam at intervals of 2.5 cm and were scanned across the slits to uniformly irradiate the RGDs.

Image of FIG. 7.
FIG. 7.

Schematic diagram of the single field irradiation and bilateral irradiation methods.

Image of FIG. 8.
FIG. 8.

Measurement setup for angle dependence of RGDs. The RGD angular dependence was measured at 0° (head-on with the tip of the RGD), 22.5°, 45°, 67.5°, and 90°.

Image of FIG. 9.
FIG. 9.

Geometry used to calculate the dose for photon beams.

Image of FIG. 10.
FIG. 10.

Geometry for simulation of dose profile curves within the RGD.

Image of FIG. 11.
FIG. 11.

Energy dependence of the dose response of RGD measured in PF. The RGD was irradiated with a photon beam in the energy ranges of 8–60 keV for single field irradiation and 8–80 keV for bilateral irradiation. Each point represents the average value of five irradiated RGDs.

Image of FIG. 12.
FIG. 12.

Reproducibility of the RGD. Each point represents the mean CV of five irradiated RGDs. The CV was the standard deviation divided by the mean readings for four readout values.

Image of FIG. 13.
FIG. 13.

Variation in data obtained by the RGDs. We evaluated the CV calculated by the mean readings and standard deviation of five RGD irradiated with each energy level.

Image of FIG. 14.
FIG. 14.

Angular dependence results of the RGD measured in 13, 17, 40, and 80 keV photon beams normalized to the response at 0°.

Image of FIG. 15.
FIG. 15.

Energy dependence of the dose response of RGD calculated by EGS4.

Image of FIG. 16.
FIG. 16.

Dose profile curves within the RGD using single field irradiation calculated by EGS4. The colored area represents the readout area (1 mm in diameter).

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/content/aapm/journal/medphys/39/10/10.1118/1.4747261
2012-09-11
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dosimetric properties of radiophotoluminescent glass detector in low-energy photon beams
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/39/10/10.1118/1.4747261
10.1118/1.4747261
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