Design and fabrication of 1D and 2D optical scanner for electron beams using color centre generation

摘要

The present paper focuses on the design and fabrication of 1D and 2D optical scanners to characterize the spatial profile of electron beams. The basis of the two systems is the generation of color centers in glass plates by irradiation, followed by the scanning of the plates, illuminated by a fixed power source (LED) with a maximum power of 3W in the spectral range of 520-560 nm, with a TCS3200 sensor. In both systems, 6mm thick glass blades (SiO2 : 76%) are used instead of expensive dosimetric films. The experimental results section first focuses on the validation and calibration accuracy of the effective absorbance of the irradiated glass in the LED spectral range with a radiation dose of up to 20 kGy. Then, it describes how the 1D optical scanner was used to scan the spatial profile obtained under the scanning horn of a Rhodotron accelerator with a maximum radiation dose of 7.8 kGy. The experimental results obtained from this method are entirely consistent with the results of other research studies, while this method is more cost-efficient and accurate compared to the previously reported methods. The 2D optical scanner was also used to accurately measure the spatial profile of the Rhodotron electron beam in static mode by scanning the color centers generated by irradiation.