Simulations to the project of a PXR based X-ray source composed of an electron linac and a double-crystal system

To realize an X-ray source at the 100-MeV class linac of the Laboratory for Electron Beam Research and Application (LEBRA) at Nihon University, the application of Parametric X-ray Radiation (PXR) was proposed. In order to solve the problem of photon extraction, a PXR generator with a double-crystal system, which is similar to a monochromator for synchrotron radiation, was designed. A slightly asymmetric arrangement of the two crystals enables a relatively efficient transportation of the X-rays. Although this is not the best condition in terms of the PXR yield, there are many advantages owing to the fixed source point and the fixed radiation exit. The introduction of a focusing system of Kirkpatrik-Baez type equipped with rhodium coated elliptical mirrors into the X-ray beam line allows to improve the brilliance. A new beam line for the PXR generator has been developed and constructed at LEBRA. The experiments using this new device will begin at the end of 2003.