Göttingen 2012 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 87: Beschleunigerphysik 9
T 87.1: Vortrag
Freitag, 2. März 2012, 08:30–08:45, VG 1.103
Investigations on the optimum accelerator parameters for the ultra-short bunch operation of the Free-Electron Laser in Hamburg (FLASH) — •Marie Rehders1, Juliane Rönsch-Schulenburg1, Jörg Rossbach1, Yauhen Kot2, Torsten Limberg2, Holger Schlarb2, Siegfried Schreiber2, Bernd Steffen2, and Mikhail Krasilnikov3 — 1Institute for Experimental Physics and CFEL, University of Hamburg — 2DESY, Hamburg — 3DESY Zeuthen, Zeuthen
In order to produce the shortest possible radiation pulses using Free Electron Lasers like FLASH, various possibilities have been proposed during the last decade. Probably the most robust method is the generation of electron bunches that in the most extreme case are as short as a single longitudinal optical mode of the SASE (Self-Amplified Spontaneous Emission) radiation. For FLASH this means that the bunch length has to be a few fs only. As a consequence, very low bunch charges in the order of 20 pC have to be used. To achieve these extremely short bunch lengths, a new photo-injector laser will be installed, which allows for the generation of shorter electron bunches right at the cathode. To identify the optimum laser and accelerator parameters during injection, beam dynamic studies are being performed. This includes laser parameters such as the pulse duration and spot size at the photo-cathode as well as the phase of gun and booster to produce the optimum distributed electron bunches for short pulse operation.