Track-based Mulitple Scattering Tomography

In detectors for particle physics experiments, not only the minimization, but also the determination and localization of the material budget is crucial due to its large impact on simulation and event reconstruction. Using a charged particle beam in the GeV-range and a high-resolution beam telescope, the material budget of any device can be determined and localized precisely by measuring the position-resolved scattering angle distribution of the particle beam. Illuminating the sample from various directions and using an inverse radon transform, this method furthermore enables three-dimensional, tomographic imaging. With these techniques, samples of high density can be investigated, exceeding the corresponding limits of X-ray imaging by far. Therefore, the method of material budget imaging has the potential of becoming a highly valuable tool also for applications outside of high-energy physics. In this contribution, we present the method of material budget imaging and its potential and limits and show first results of track-based multiple scattering tomography measurements performed at the DESY Test Beam Facility.