Speaker
Dr
Haijun Yang
(University of Michigan)
Description
In order to exploit fully the physics potential of future lepton
colliders, highly precise tracking systems will be needed, for which
systematic alignment uncertainties must be small. We describe
ongoing R&D in frequency scanned interferometry (FSI) to be applied
to alignment monitoring of a detector's charged particle tracking
system, in addition to its beam pipe and final-focus quadrupole magnets.
In FSI alignment, one measures hundreds of absolute point-to-point
distances of detector elements in 3 dimensions by using an array of
beams split from a central laser. We report here on progress using
a dual-laser FSI single-channel prototype. Dual lasers with oppositely
scanned frequency directions permit cancellation of many systematic errors, making the alignment robust against vibrations and environmental
disturbances. Under realistic environmental conditions, a precision of
about 0.2 microns was achieved for a distance of about 40 cm for the
prototype. Work is now under way to demonstrate a multi-channel system
on the bench. Recent progress will be summarized.
Primary author
Dr
Haijun Yang
(University of Michigan)
Co-authors
Prof.
Keith Riles
(University of Michigan)
Mr
Tianxiang Chen
(University of Michigan)
