First Approach to the Noise Analysis of a Dual Silicon Strip Detector in a System to Verify Radiotherapy Treatments

摘要

This work presents the first approach for the noise analysis of a Dual Single Sided Silicon Strip Detector (DSSSSD) in a system specifically designed for radiotherapy treatment verification. In order to obtain the absorbed dose, the system has been designed to measure the charge generated in the detector by the incident radiation from a medical linear accelerator (linac); but, even when there is no irradiation signal from the linac, the system measures the electronic noise and the leakage current of the detector. The amount of charge generated in the detector whose origin is not the irradiation from the linac should be known in order to correct it, if required, from the total amount of accumulated charge. The model below describes and characterizes this effect in the device.