We describe a refrigerated EBIT (R-EBIT) commissioned at
the AlbaNova Research Center at Stockholm University. As an innovative
solution, the superconducting magnet and the trapping drift tubes of the
R-EBIT are cooled to a temperature of 4 K by a set of two cooling heads
connected to helium compressors. This dry, i.e. liquid helium and liquid
nitrogen free, system is easily operated and creates highly charged ions at
a fraction of the cost of traditional liquid-cooled systems. A pulsed and
continuous gas injection system was developed to feed neutral particles into
the electron beam in the trap region. This improves significantly the highly
charged ion production and R-EBIT performance. Fast extraction of ions from
the R-EBIT yields very short ( < 100 ns), charge-separated ion bunches which
can be either analysed using a straight time-of-flight section or sent to
experimental beam lines following selection in a bending magnet. An
emittance meter was used to measure the emittance of the ions extracted from
the R-EBIT. The extracted ions were also re-trapped in a cylindrical Penning
trap and properties of the re-trapped ions have been measured using the
emittance meter. Results of these measurements are reported in this
publication.
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