Speaker
Dr
Paul Coe
(University of Oxford)
Description
The StaFF (Stabilisation of Final Focus) system will use interferometers to monitor
the relative positions of several key components in the beam-delivery and interaction
region. The most demanding application will be the relative position monitoring of
the ILCs final focus quadrupole magnets; whose mutual and beam-relative stability,
will have a direct impact on detector luminosity.
Established, laser based Frequency Scanning Interferometry (FSI) and fixed-wavelength
interferometry offer positional resolution at the length scales of the laser
wavelength (roughly 1500 nm) and below the wavelength, respectively. As part of the
ATF at KEK, the StaFF group are currently testing ideas for this system.
Interferometer designs undergo trials in Oxford and tests of a network setup are
being prepared for installation at the ATF at KEK to resolve the relevant performance
issues.
The main issues relating to deployment of interferometers for this role at the ILC
will be discussed, together with current work on interferometer design and tests to date.
Summary
Interferometers designed to monitor the relative stability of the final focus
quadrupoles are being tested at Oxford and the KEK ATF.
Primary author
Dr
Paul Coe
(University of Oxford)
Co-authors
Dr
Armin Reichold
(University of Oxford)
Dr
David Urner
(University of Oxford)
