Berlin 2014 – scientific programme
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A: Fachverband Atomphysik
A 35: Poster: Interaction with VUV and X-ray light
A 35.10: Poster
Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais
DESC: A multilayer based delay stage for CAMP at the FEL FLASH enables time-resolved experiments from fs to 100 ps range. — •Mario Sauppe1, Jan P. Müller1, Daniel Rolles2, Rolf Treusch2, Authors as in3, Daniela Rupp1, and Thomas Möller1 — 1IOAP, TU Berlin — 2DESY — 3[1]
Brilliant light pulses from short wavelength free-electron lasers allow the investigation of nanosized particles with a very high temporal and spatial resolution. Radiation damage leads to fast destruction of the investigated objects. Ionization processes which dramatially change the electronic structure of the target objects take place on the
fs timescale. Ionic motion, on the other hand, may start during the interaction with the pulse but can reach into a 100 ps range. In order to investigate the complex dynamics of radiation damage in nanosized particles on all relevant time scales, the DElay Stage for CAMP DESC will be set up at the free-electron laser FLASH.
For splitting and delaying the light pulses, DESC will be based on highly reflective multilayer plane mirrors, e.g. for 13.5 nm but also other wavelengths are possible. Delays will be available from about 0 fs up to 600 ps with a femtosecond resolution due to high precision closed loop stages. After DESC, the double pulse can be focused by a Kirkpatrick-Baez optic, leading to extremely intense light pulses in a micrometer spot in the CFEL-ASG Multi Purpose chamber CAMP [1]. The poster gives an overview of DESC and introduces challenges in
the design.
L. Strüder et al., Nucl. Instr. Meth. Phys. Res. A 614 (2010) 483.