Speaker
Description
While developing stable and re-accelerated rare
isotope beams (RIB) for acceleration with the TAMU
K500 cyclotron, a background of various stable
beams has been observed. It has been determined
that this background is arising from alloys and
contamination in the components of our ECR ion
sources, in particular, the aluminum alloy plasma
chamber. We have developed a detector system
based on diamond detector telescopes that allows us
to measure the composition of the beam after
acceleration with the K500 cyclotron at TAMU. Using
this technique, we have been able to develop ion
source and cyclotron tuning methods to minimize the
stable beam background and maximize the stable
beams of interest and/or the RIBs. We also endeavor
to reduce the stable beam background from the ECR
ion sources using techniques such as pure aluminum
liners. In my presentation, I plan to show our
accelerated beam detection setup with diamond
detectors. I also plan to present about the
background we have measured with this setup from
the ECRIS components, in particular, the plasma
chamber. Finally, I will comment on our efforts to
reduce this background.