Dresden 2014 – wissenschaftliches Programm
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BE: Beschleunigerphysik
BE 2: Diagnostics and Instrumentation I
BE 2.8: Vortrag
Montag, 31. März 2014, 17:15–17:30, ZEU 255
Cone-shaped pickups upgrade for the 40 GHz Bunch Arrival-time Monitors at FLASH and European XFEL — •Aleksandar Angelovski1, Andreas Penirschke1, Marie Kristin Czwalinna2, Cezary Sydlo2, Christopher Gerth2, Holger Schlarb2, Silke Vilcins-Czvitkovits2, Thomas Weiland3, and Rolf Jakoby1 — 1Institut für Mikrowellentechnik und Photonik, TU Darmstadt, Germany — 2DESY, Hamburg, Germany — 3Institut für Theorie Elektromagnetischer Felder, TU Darmstadt, Germany
For sub-10 fs measurement resolution of the arrival time for electron bunches higher than 200 pC, an electro-optical detection scheme was developed and implemented at FLASH. The Bunch Arrival-time Monitors (BAMs) comprise pickup electrodes, an RF and electro-optical frontend and read out electronics. In order to measure the arrival time for charges as low as 20 pC the bandwidth of the BAMs was increased up to 40 GHz. First measurements show reduced signal strength due to high losses in the RF signal path. An analysis towards increasing the pickup signal level through modifying the pickup design is presented. A non-hermetic demonstrator is build to compare RF measurements with CST STUDIO SUITE simulations.