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.
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; An electrostatic in-line charge-state purification system for multicharged ions in the kiloelectronvolt energy range. Rev. Sci. Instrum. 1 August 2019; 90 (8): 083306. https://doi.org/10.1063/1.5093407
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