Improvements on the KSU-CRYEBIS, a user facility for low energy, highly charged ions

The KSU-CRYEBIS, a CRYogenic Electron Beam Ion Source, delivers ions over a wide range of ion energy per charge, ion mass, and charge state for atomic physics experiments. The ionization power was increased to 9.9 keV to produce up to Ar{sup 18+}, Fe{sup 24+}, Kr{sup 34+}, and Xe{sup 47+} with pA time-averaged currents. The improved high voltage switchyard allows for faster cycling which benefits the production of the lower charge states which can yield up to 10 nA of time-averaged currents. Upgraded diagnostics allow for a better optimization of the parameters desired by individual users. New expulsion techniques have been developed to increase the peak current in fast expulsions as well as to increase the {open_quotes}effective{close_quotes} duty cycle to 45% in slow expulsions. The energy per charge covers 0.3 to 160 keV with a substantially improved stability between 0.1 to 5 V. New users will be accommodated.