Dresden 2017 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 5: Hadron and Electron Accelerators
AKBP 5.6: Talk
Wednesday, March 22, 2017, 16:15–16:30, MOL 213
Absolute charge calibration and degeration studies of various scintillation screens used in laser Wakefield acceleration — •Thomas Kurz1,2, Jurjen Couperus2,7, Jakob Krämer2,7, Hao Ding1,6, Stephan Kuschel3,4, Dominik Hollatz3,4, Alexander Köhler2,7, Omid Zarini2,7, Richard D’arcy5, David Schinkel3,4, Jan-Patrick Schwinkendorf5,8, Matt Zepf3,9, Jens Osterhoff5,8, Arie Irman2, Ulrich Schramm2,7, and Stefan Karsch1,6 — 1Ludwig-Maximilians-Universität, München — 2Helmholtz-Zentrum Dresden-Rossendorf, Dresden — 3Helmholtz Institut, Jena — 4Friedrich-Schiller-Universität Jena, Jena — 5Deutsches Elektronen-Synchrotron, Hamburg — 6Max-Planck-Institut für Quantenoptik, Garching — 7Technische Universität Dresden, Dresden — 8Universität Hamburg, Hamburg — 9Queen’s University, Belfast
Scintillation screens are generally used as the electron beam diagnostics in Laser Wakefield Accelerators. We present an absolute charge calibration of the electron detector i.e. a scintillating screen with a layer of powdered rare earth phosphor (Gd2O2S:TB). The calibration was designed to investigate the absolute light/charge–ratio and saturation effects of various screens used in current laser–electron accelerators. The scintillation screens show a linear photon response to the applied charge up to an upper boundary caused by saturation effects. We also report about degeneration studies of some of these screens which were excited with a similar condition compared to Wakefield experiments.