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

Daniel Schury; Ajit Kumar; Alain Méry; Jean-Yves Chesnel; Anna Lévy; Stéphane Macé; Christophe Prigent; Jean-Marc Ramillon; Jimmy Rangama; Patrick Rousseau; Sébastien Steydli; Martino Trassinelli; Dominique Vernhet; Emily Lamour

doi:10.1063/1.5093407

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

Rev Sci Instrum. 2019 Aug;90(8):083306. doi: 10.1063/1.5093407.

Affiliations

¹ Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR 7588, 4 place Jussieu, 75252 Paris, France.
² CIMAP, CEA/CNRS/ENSICAEN/Université de Caen Normandie, 6 Boulevard du Maréchal Juin 14050 Caen, France.

PMID: 31472612
DOI: 10.1063/1.5093407

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 kiloelectronvolt energy range is reported. The analyzer consists of a set of four consecutive electrostatic 140° concentric cylindrical electrodes enclosed by Matsuda electrodes. This setup was recently tested and validated using O⁵⁺, Ar⁹⁺, and Xe²⁰⁺ 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 the Wien filter, our system has the advantage of being purely electrostatic and therefore lacking common drawbacks as, for example, hysteresis.