Experiments with fast spectroscopic pnCCDs at BESSY and FLASH VUV-FEL

We present the design and realization of a fast pn-charge coupled device (pnCCD) detector system with excellent sensitivity and energy resolution over a wide wavelength range from the VUV to hard X-rays along with two different types of application. In a spectroscopic measurement at the FLASH Free Electron Laser at DESY the signal peak of the monoenergetic 90 eV photons was clearly seperated from noise and higher harmonics of the laser. It had a FWHM of 35 eV. In a further experiment using white synchrotron radiation at BESSY the Bragg reflections from a multilayer sample were recorded while simultaneously resolving energy (5 keV ≪ E ≪ 35 keV) and space (75 μm) in one measurement.