Freiburg 2008 – scientific programme

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T: Fachverband Teilchenphysik

T 71: Beschleunigerphysik III

T 71.2: Talk

Friday, March 7, 2008, 14:15–14:30, KGI-HS 1019

Investigations on reflective optics for an optical system used for time resolved measurements — •Kilian Rosbach for the PITZ collaboration — Humboldt University Berlin

The Photoinjector Test facility at DESY Zeuthen (PITZ) is an electron accelerator which was built to develop and optimize high brightness electron sources suitable for SASE FEL operation. For bunch length and longitudinal phase space measurements, the light from one of several radiators at different screen stations is transported by a complex refractive optical system of about 30m length to a streak camera. Dispersion limits the possible temporal resolution, while radiation damage to the lenses results in a strong loss of light. Intermediate solutions for both problems exist, but improvement is desirable. Since mirrors are not sensitive to radiation and do not introduce any dispersion, using reflective instead of refractive optics is considered. Different geometries of mirrors are investigated to find a design which delivers good spatial and temporal resolution simultaneously. One promising system is analyzed in more detail, results from simulations and measurements at a lab test setup are compared.