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Abstract

One of the unique features of European XFEL is the high repetition rate of the X-ray pulses, up to a 4.5 MHz intra-train pulse frequency, which poses a challenge to the sample injection systems. To address this challenge, the Sample Environment and Characterization group (SEC) sets up a versatile platform for liquid jet characterization; establishing automated image processing in order to obtain faster and highly reproducible parameters from jetting tests. The chamber will be equipped with a “high power” dual pulse laser. Combined with a sCMOS camera this makes velocity measurements of a fast and thin liquid jets feasible. The second objective of this project is to develop the tools to streamline liquid jet support in order to allow less experienced user groups to perform experiments as well as to reduce the effort of the support team in the long run. This streamlining consists of standardizing both the sample delivery instrumentation and the experimental configurations, by developing a standard for jetting shared between LCLS and EuXFEL: standard nozzle design; exchange of information; automated image recognition and jetting parameter database.

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