Speaker
Dr
PAUL SCHOESSOW
(Euclid Techlabs)
Description
The collimation systems of the Compact Linear Collider (CLIC) and
International Linear Collider (ILC) need to simultaneously fulfill
three different functions. These systems must (1) provide adequate
halo collimation to reduce the detector background, (2) ensure
collimator survival and machine protection against missteered beams,
and (3) not significantly amplify incoming trajectory fluctuations via
the collimator wakefields.Recent LHC studies have shown the benefits
of replacing metal collimators with dielectrics (graphite). We are
investigating the possibility of using collimator designs that
incorporate dielectrics as a means to reduce wakefields in linear
colliders, permitting higher luminosities to be achieved with smaller
collimator apertures. Dielectrics provide the additional parameters of
permittivity and bulk conductivity to be used in the optimization
process. Based on experience with dielectric wakefield accelerating
structures, composite dielectric-metal and dielectric-dielectric
composite collimators have also been studied. Candidate dielectric
materials include graphite and ceramics. We report on the status of
our work including our proposed experiment at the SLAC/FACET facility.
Primary author
Alexei Kanareykin
(Euclid Techlabs)
