Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 6: Molecular Spectroscopy of Liquid Jets II

MO 6.8: Vortrag

Dienstag, 11. März 2025, 12:45–13:00, HS XV

Liquid sample delivery at EuXFEL — •Joana Valerio, Marco Kloos, Katerina Dörner, Huijong Han, Elisa Delmas, Agnieszka Wrona, Gisel Peña, Alexander Gierke, Elizabeth Galtry, and Joachim Schulz — European XFEL, Schenefeld, Germany

One of the most distinctive characteristics of the European XFEL is the high repetition rate of the X-ray pulses. The intra-train repetition rate of up to 4.5 MHz represents a significant challenge for the sample injection systems. The Sample Environment & Characterisation (SEC) group of the EuXFEL is developing sample delivery systems for all scientific instruments, in addition to providing user support in sample preparation, characterization, and delivery.

Cylindrical microjet injection systems remain the most prevalent type of sample injection system employed in the fields of soft and hard X-ray science. Nevertheless, this methodology is subject to several intrinsic constraints. For example, the curved surface of the nozzle presents a challenge in determining the path length of the X-rays within the sample. The sample must have a well-defined and controllable thickness of just a few tens of microns or less, and the efficiency of sample usage requires the use of micron-sized liquid sheet jets. In light of these limitations, various 3D-printed nozzle designs have been developed to produce micron-thick and highly stable microscopic flat sheet jets. These designs are based on colliding and impingement nozzle designs, to make this technology more widely available to users, especially for spectroscopy.

Keywords: Liquid Jets; Sample delivery; Flat sheet jets