Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 48: Beschleunigerphysik X (Injektoren)
HK 48.8: Vortrag
Dienstag, 5. März 2013, 18:30–18:45, WIL-C205
Commissioning and Characterisation of the Photo-Injector Laser for Single-Spike Operation at FLASH — •Tim Plath1, Juliane Rönsch-Schulenburg1, and Bernd Steffen2 — 1Universität Hamburg, Deutschland — 2Deutsches Elektronen Synchrotron, Hamburg, Deutschland
An important feature of FELs is the short duration of the light pulse, especially the generation of ultra-short FEL pulses. While there are several ways to achieve this, like seeding, the most robust one is to generate electron bunches with a length of only one optical mode. At FLASH, this length is about 1*m (3fs), which requires a charge of only about 20pC. The reduction of the charge also allows the shortening of the electron bunch duration directly at the photo cathode, which allows for stable operation with these short pulses. This requires a shorter photo-injector laser pulse and therefore a different photo-injector laser.
This talk presents the setup and commissioning of a new photo-injector laser system as well as first studies on laser beam characteristics, like beam position and distribution, spectra, temporal distribution and the stability of those properties. This partially requires the development of new diagnostics.