Göttingen 2025 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 8: Atmospheric Plasmas and their Applications III

P 8.6: Vortrag

Dienstag, 1. April 2025, 15:30–15:45, ZHG006

Impact of a plasma window arc discharge on the transmission properties of a 48-Ca heavy ion beam — •Andre Michel, Fateme Ghaznavi, Michael Händler, Adem Ates, Marcus Iberler, and Joachim Jacoby — Goethe Universität Frankfurt

With the increase of particle beam energies and intensities in accelerator facilities around the world, a reliable technique for the separation of accelerator vacua to high-pressure targets is needed where conventional techniques such as differential pumping stages or solid membranes might fail. A promising technique that allows the transmission of such ion beams even at short distances is the so-called plasma window [1]. It is based on a cascaded arc discharge that enables the active control of the pressure gradient depending on the selected working gas, flow rate and arc current.

In 2018 the Plasma Physics department of Goethe University Frankfurt developed a prototype of the plasma window, which has since been optimized for its purpose as an active pressure separation component in particle accelerators. As part of its further development, the plasma window has been successfully used to demonstrate the transmission of a heavy ion beam while maintaining the pressure gradient up to 10h in a single run.

This contribution gives an insight into the plasma physical properties as well as the operating parameters of the developed plasma window and highlights its impact on the properties of the transmitted ion beam.

[1] Hershcovitch, A., J. Appl. Phys., AIP Publishing, 1995, 78, 5283

Keywords: Plasma Window; Ion Beam Transmission; Beam Emittance; Plasma Spectroscopy; Arc Discharge