Recent Upgrades of the Gas Handling System for the Cryogenic Stopping Cell of the FRS Ion Catcher

TL;DR

This paper details recent technical upgrades to the gas handling system of the cryogenic stopping cell at GSI/FAIR, enhancing gas purity and ion extraction efficiency for improved experimental outcomes.

Contribution

It introduces new gas lines, purifiers, and monitoring techniques that significantly improve buffer gas quality and system performance.

Findings

Enhanced gas purity with new purifiers

Improved ion extraction efficiency

Better monitoring of helium buffer gas

Abstract

In this paper, the major upgrades and technical improvements of the buffer gas handling system for the cryogenic stopping cell of the FRS Ion Catcher at GSI/FAIR (in Darmstadt, Germany) are described. The upgrades include implementation of new gas lines and gas purifiers to achieve a higher buffer gas cleanliness for a more efficient extraction of reactive ions as well as suppression of the molecular background ionized in the stopping cell. Furthermore, additional techniques have been implemented for improved monitoring and quantification of the purity of the helium buffer gas.