Simulations about Stability, Damage, and Heating Impacts for an X-ray Optical Delay Line at SASE3

Author:

Tavakkoly Marziyeh,Grünert Jan,Koch Andreas,La Civita Daniele,Makita Mikako,Meyer Michael,Planas Marc,Serkez Svitozar,Sinn Harald,Wohlenberg Torsten,Vannoni Maurizio

Abstract

Abstract European XFEL has initiated a project to facilitate two-color pump-probe spectroscopy with X-rays at the SASE3 soft X-ray undulator. To this end, the controllable temporal delay between the two X-ray pulses is obtained by a magnetic chicane and an optical delay line (ODL) that delay the electron and X-ray beams, respectively. This article focuses on describing the alignment process of the ODL and its related specification. The distance between the experimental station and the ODL is nearly 500 m, thus if one of the mirrors in the ODL is misaligned, the focus spot experiences a noticeable shift. Moreover, a pulse train can include up to 2700 X-ray pulses with a minimum spacing of 222 ns. An increase in temperature per pulse would just add up if there was no heat removal during that time and the material could be damaged during a pulse train. The question arises whether the X-ray optics can survive the high X-ray peak power during a single pulse. Finally, the present study also investigates the damage issue.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Reference8 articles.

1. Photon beam transport and scientific instruments at the European XFEL;Tschentscher;Applied Sciences.,2017

2. Opportunities for Two-color Experiments at the SASE3 undulator line of the European XFEL;Geloni,2017

3. Opportunities for two-color experiments in the soft X-ray regime at the european XFEL;Serkez;Applied Sciences,2020

4. Transition regime in the ultrafast laser heating of solids;Shayduk;Journal of Applied Physics,2020

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