title: Improvement of density resolution in short-pulse hard x-ray radiographic imaging using detector stacks.
abstract: We demonstrate that stacking several imaging plates (IPs) constitutes an easy method to increase hard x-ray detection efficiency. Used to record x-ray radiographic images produced by an intense-laser driven hard x-ray backlighter source, the IP stacks resulted in a significant improvement of the radiograph density resolution. We attribute this to the higher quantum efficiency of the combined detectors, leading to a reduced photon noise. Electron-photon transport simulations of the interaction processes in the detector reproduce the observed contrast improvement. Increasing the detection efficiency to enhance radiographic imaging capabilities is equally effective as increasing the x-ray source yield, e.g., by a larger drive laser energy.
authors: GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany.
authors: B
authors: B
authors: Borm
authors: GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany.
authors: F
authors: F
authors: Gärtner
authors: GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany.
authors: D
authors: D
authors: Khaghani
authors: GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany.
authors: P
authors: P
authors: Neumayer