Göttingen 2012 – scientific programme
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T: Fachverband Teilchenphysik
T 81: Beschleunigerphysik 3
T 81.8: Talk
Tuesday, February 28, 2012, 18:35–18:50, VG 1.103
Pickup Design for High Bandwidth Bunch Arrival-time Monitors in Free-Electron Lasers — •Aleksandar Angelovski1, Alexander Kuhl2, Andreas Penirschke1, Sascha Schnepp2, Marie Kristin Bock4, Michael Bousonville4, Holger Schlarb4, Thomas Weiland3, and Rolf Jakoby1 — 1TU Darmstadt, Institut für Mikrowellentechnik und Photonik, Merckstrasse 25, 64283 Darmstadt, Germany — 2TU Darmstadt, Graduate School of Computational Engineering, Dolivostrasse 15, 64293 Darmstadt, Germany — 3TU Darmstadt, Institut für Theorie Elektromagnetischer Felder, Schlossgartenstrasse 8, 64289 Darmstadt, Germany — 4Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
The increased demands for low bunch charge operation mode in the free-electron lasers (FELs) require an upgrade of the existing synchronization equipment. As a part of the laser-based synchronization system, the bunch arrival-time monitors (BAMs) should have a sub-10 femtosecond precision for high and low bunch charge operation. In order to fulfill the resolution demands for both modes of operation, the bandwidth of such a BAM should be increased up to a cutoff frequency of 40 GHz. In this talk, we present the design and the realization of high bandwidth cone-shaped pickup electrodes as a part of the BAM for the FEL in Hamburg (FLASH) and the European x-ray free-electron laser (European XFEL). The proposed pickup was simulated with CST STUDIO SUITE, and a non-hermetic model was built up for radio frequency (rf) measurements.