Upgrades and maintenance of the CRYRING@ESR electron cooler for improved internal electron target operation
Abstract
The electron cooler of the CRYRING@ESR storage ring at the GSI-FAIR accelerator complex is a unique instrument, which not only provides beam cooling of the stored ions, but also serves as a low-energy electron target for Dielectronic Recombination experiments. The minimisation of vacuum contamination and the response to rapid energy changes are key requirements of the cooler in electron target mode. Therefore, a test bench was prepared to study the outgassing behaviour of the electron gun components and a setup was constructed to evaluate the drift-electrode-modulation of the acceleration voltage of the cooler. The vacuum studies showed that the electron gun cathode was severely malfunctioning and resulted in its replacement. The drift-electrode-modulation of the acceleration voltage showed significant improvements compared to direct modulation of the terminal voltage of the cooler.
Keywords
Cite
@article{arxiv.2501.14690,
title = {Upgrades and maintenance of the CRYRING@ESR electron cooler for improved internal electron target operation},
author = {Athanasios Koutsostathis and Claude Krantz and Elena-Oana Hanu and Frank Herfurth and Regina Heß and Wolfgang Kaufmann and Michael Lestinsky and Mirko Dieter Looshorn and Esther Babette Menz and Andreas Reiter and Jon Roßbach and Stefan Schippers and Phe Man Suherman},
journal= {arXiv preprint arXiv:2501.14690},
year = {2025}
}
Comments
This work was presented with a poster at the 32nd Annual Symposium of the Hellenic Nuclear Physics Society HNPS2024, in Thessaloniki. This article has been submitted to the 31st volume of the HNPS Advances in Nuclear Physics proceedings journal