Logo Logo
Switch Language to German
Kurz, Thomas; Couperus, Jurjen Pieter; Kraemer, Jakob Matthias; Ding, Hao; Kuschel, Stephan; Koehler, Alexander; Zarini, Omid; Hollatz, Dominik; Schinkel, David; D'Arcy, Richard; Schwinkendorf, Jan-Patrick; Osterhoff, Jens; Irman, Arie; Schramm, Ulrich; Karsch, Stefan (2018): Calibration and cross-laboratory implementation of scintillating screens for electron bunch charge determination. In: Review of Scientific Instruments, Vol. 89, No. 9, 93303
Full text not available from 'Open Access LMU'.


We revise the calibration of scintillating screens commonly used to detect relativistic electron beams with low average current, e.g., from laser-plasma accelerators, based on new and expanded measurements that include higher charge density and different types of screens than previous work [Buck et al., Rev. Sci. Instrum. 81, 033301 (2010)]. Electron peak charge densities up to 10 nC/mm(2 )were provided by focused picosecond-long electron beams delivered by the Electron Linac for beams with high Brilliance and low Emittance (ELBE) at the Helmholtz-Zentrum Dresden-Rossendorf. At low charge densities, a linear scintillation response was found, followed by the onset of saturation in the range of nC/mm(2). The absolute calibration factor (photons/sr/pC) in this linear regime was measured to be almost a factor of 2 lower than that reported by Buck et al. retrospectively implying a higher charge in the charge measurements performed with the former calibration. A good agreement was found with the results provided by Glinec et al. [Rev. Sci. Instrum. 77, 103301 (2006)]. Furthermore long-term irradiation tests with an integrated dose of approximately 50 nC/mm(2) indicate a significant decrease of the scintillation efficiency over time. Finally, in order to enable the transfer of the absolute calibration between laboratories, a new constant reference light source has been developed. Published by AIP Publishing.