Freiburg 2024 – scientific programme

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MO: Fachverband Molekülphysik

MO 24: Poster: Experimental Techniques

MO 24.5: Poster

Thursday, March 14, 2024, 17:00–19:00, Tent C

Installation of a hollow cathode molecular ion source — •Julian Rimatzki, Simon Reinwardt, and Michael Martins — Universität Hamburg, Hamburg, Deutschland

A research plan has been devised for studying inner-shell photoionization of molecular ions with a small thermal energy at the photon-ion spectrometer at PETRA III (PIPE)[1] of DESY in Hamburg. First result to characterise the plasma of a hollow cathode ion source will be shown. Such a characterisation can be obtained by studying COH⁺ and HCO⁺ isomers in the gas phase using soft X-Ray spectroscopy. The challenge of forming ions in a higher geometrical state like the COH⁺ can be solved by using a ion source with a plasma temperature below 18.000 K [2].

We are undergoing the construction and parametrization of our new Ion source at the PIPE-setup. We will present first results to form homogeneous ion beams with only one constitutional isomer.

[1] Schippers, S. et al., X-ray Spec., 2020, 49, 11.

[2] Nobes, R. H., Radom, L., Chem. Phys., 1981, 60, 1.

Keywords: soft X-ray; PETRA III; isomer; Ion source