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ST: Fachverband Strahlen- und Medizinphysik

ST 6: Biomedical Imaging II and Radiation Therapy II

ST 6.1: Talk

Thursday, March 3, 2016, 11:00–11:15, VMP6 HS C

X-ray beam characterization at the Munich Compact Light Source — •David Cont — Lehrstuhl Biomedizinische Physik, Technische Universität München

Recently our group is running the 'Munich compact light source' to produce X-rays due to inverse Compton scattering at the intersection point of an electron beam and a counter propagating laser. This method allows to produce a highly coherent and brilliant X-ray beam which can be exploited to research biomedical questions. Since the results of these biomedical measurements depend on the quality of the used X-ray beam, we have to monitor its characteristics and its source properties. This is necessary to stabilize the beam properties to avoid shifts in source position, changes of its diameter and flux. One attempt to characterize and control the source properties is the so called 'X-Ray eye'. It consists of a small X-ray CCD camera and a python script to process the acquired data. We built in a knife-edge between the source and the 'X-Ray eye'. The so obtained frames with the knife-edge in the foreground are processed by fitting the pixel values of two ROIs. From the fit parameters we obtain the source position, its width and the flux together with the respective standard deviations. For a correct flux determination we also calibrated the 'X-Ray eye' with our Pilatus X-ray detector.