Record Details

Title:
Analysis of the halo background in femtosecond slicing experiments
Topic:
Abstract:
The slicing facility FemtoSpeX at BESSY II offers unique opportunities to study photo-induced dynamics on femtosecond time scales by means of X-ray magnetic circular dichroism, resonant and non-resonant X-ray diffraction, and X-ray absorption spectroscopy experiments in the soft X-ray regime. Besides femtosecond X-ray pulses, slicing sources inherently also produce a so-called `halo' background with a different time structure, polarization and pointing. Here a detailed experimental characterization of the halo radiation is presented, and a method is demonstrated for its correct and unambiguous removal from femtosecond time-resolved data using a special laser triggering scheme as well as analytical models. Examples are given for time-resolved measurements with corresponding halo correction, and errors of the relevant physical quantities caused by either neglecting or by applying a simplified model to describe this background are estimated.
Imprint:
Chester, IUCr, 2016
Journal Information:
J. Synchrotron Rad., Vol. 23, no. 3 (2016)
ISSN:
0909-0495
1600-5775
External related publications:
Language(s):
English


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 Record created 2016-10-11, last modified 2017-02-09

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