# An electrostatic in-line charge-state purification system for multicharged ions in the kiloelectronvolt energy range

## TL;DR

This paper reports on a new electrostatic analyzer designed for in-line charge-state purification of multicharged ions in the keV energy range, demonstrating high resolving power and effective purification capabilities.

## Contribution

The paper introduces a novel electrostatic in-line charge-state purification system with high resolving power and transmission efficiency, outperforming traditional solutions like Wien filters.

## Key findings

- Achieved a resolving power of 10.5.
- Demonstrated 100% transmission of desired charge states.
- Effective purification for charge states up to 20+.

## Abstract

The performance of a newly built omega type electrostatic analyzer designed to act as an in-line charge-state purification system for ions in the keV energy range is reported. The analyzer consists of a set of four consecutive electrostatic 140{\deg} concentric cylindrical electrodes enclosed by Matsuda electrodes. This setup was recently tested and validated using $O^{5+}$ , $Ar^{9+}$ and $Xe^{20+}$ ion beams at an energy of 14 qkeV at the ARIBE facility. A resolving power of 10.5 and a transmission of 100 % of the desired charge state are measured allowing a good purification of incoming ion beams with charge states up to 10+ and a fairly good purification for charge states at least up to 20+. In comparison with other in-line solutions such as Wien filter, our system has the advantage of being purely electrostatic and therefore lacking common drawbacks as for example hysteresis.