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28 March 2024
 
  » arxiv » 1710.6684

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Development and characterization of a laser-induced acoustic desorption source
Zhipeng Huang ; Tim Ossenbrüggen ; Igor Rubinsky ; Matthias Schust ; Daniel A. Horke ; Jochen Küpper ;
Date 18 Oct 2017
AbstractA laser-induced acoustic desorption source, developed for use at central facilities, such as free-electron lasers, is presented. It features prolonged measurement times and a fixed interaction point. A novel sample deposition method using aerosol spraying provides a uniform sample coverage and hence stable signal intensity. Utilizing strong-field ionization as a universal detection scheme, the produced molecular plume is characterized in terms of number density, spatial extend, fragmentation, temporal distribution, translational velocity, and translational temperature. The effect of desorption laser intensity on these plume properties is evaluated. While translational velocity is invariant for different desorption laser intensities, pointing to a non-thermal desorption mechanism, the translational temperature increases significantly and higher fragmentation is observed with increased desorption laser fluence.
Source arXiv, 1710.6684
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