Journal Article

PUBDB-2024-01986

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Enhancing electrospray ionization efficiency for particle transmission through an aerodynamic lens stack

Rafie-Zinedine, S. (Corresponding author)XFEL.EU* ; Varma Yenupuri, T. ; Worbs, L. ; Maia, F. R. N. C. ; Heymann, M. ; Schulz, J. ; Bielecki, J.

2024
Wiley-Blackwell [Erscheinungsort nicht ermittelbar]

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Please use a persistent id in citations: doi:10.1107/S1600577524000158  doi:10.3204/PUBDB-2024-01986

Abstract: This work investigates the performance of the electrospray aerosol generator atthe European X-ray Free Electron Laser (EuXFEL). This generator is, togetherwith an aerodynamic lens stack that transports the particles into the X-rayinteraction vacuum chamber, the method of choice to deliver particles for single-particle coherent diffractive imaging (SPI) experiments at the EuXFEL. Forthese experiments to be successful, it is necessary to achieve high transmission ofparticles from solution into the vacuum interaction region. Particle transmissionis highly dependent on efficient neutralization of the charged aerosol generatedby the electrospray mechanism as well as the geometry in the vicinity of theTaylor cone. We report absolute particle transmission values for differentneutralizers and geometries while keeping the conditions suitable for SPIexperiments. Our findings reveal that a vacuum ultraviolet ionizer demonstratesa transmission efficiency approximately seven times greater than the soft X-rayionizer used previously. Combined with an optimized orifice size on the counterelectrode, we achieve > 40% particle transmission from solution into the X-rayinteraction region. These findings offer valuable insights for optimizing elec-trospray aerosol generator configurations and data rates for SPI experiments

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Contributing Institute(s):

1. Sample Environment and Characterisation (XFEL_E2_SEC)

Research Program(s):

1. 6G13 - Accelerator of European XFEL (POF4-6G13) (POF4-6G13)

Experiment(s):

1. Experiments at XFEL

Appears in the scientific report 2024

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