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EBIT Test Ion Source
At GSI a new generation of EBIT devices – the Dresden EBIT type – is operated as a test ion source for the HITRAP decelerator
project to supply experiments with close to real ion species for commissioning. The ions
produced by that source will be sent to the Cooler Penning trap investigating its operation as well
as to the experiments.
This source is typically operated with gaseous elements but since some experiments require
different species for tests, charge breeding in this small, room temperature EBIT became
necessary. One example is the use of Ca14+ ions for laser spectroscopy of the forbidden fine
structure transition 2s22p2 3P0 – 3P1, which serves as a test for the hyperfine spectroscopy planned
for H and Li-like ions as will be supplied by HITRAP.
Schematic HITRAP test ion source setup at GSI. The main elements of the setup are: the SPARC
EBIT with its electrodes and electron gun, the surface ion source for production of singly-charged
alkaloids, the quadrupole deflector for fast switching between single ion beam injection into the EBIT
and extraction of charge bred ion beams towards experiments or for analysis, and the multi-passage
spectrometer (MPS) for magnetic analysis of the charge state distribution.
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