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SUMMARY:Frequency Scanned Interferometry for ILC Tracker Alignment
DTSTART;VALUE=DATE-TIME:20110810T220500Z
DTEND;VALUE=DATE-TIME:20110810T222000Z
DTSTAMP;VALUE=DATE-TIME:20130523T114153Z
UID:indico-contribution-104@cern.ch
DESCRIPTION:Speakers: Dr. YANG\, Haijun (University of Michigan)\nIn order
  to exploit fully the physics potential of future lepton\ncolliders\, high
 ly precise tracking systems will be needed\, for which\nsystematic alignme
 nt uncertainties must be small. We describe\nongoing R&D in frequency scan
 ned interferometry (FSI) to be applied\nto alignment monitoring of a detec
 tor's charged particle tracking\nsystem\, in addition to its beam pipe and
  final-focus quadrupole magnets.\nIn FSI alignment\, one measures hundreds
  of absolute point-to-point\ndistances of detector elements in 3 dimension
 s by using an array of\nbeams split from a central laser. We report here o
 n progress using\na dual-laser FSI single-channel prototype. Dual lasers w
 ith oppositely\nscanned frequency directions permit cancellation of many s
 ystematic errors\, making the alignment robust against vibrations and envi
 ronmental\ndisturbances. Under realistic environmental conditions\, a prec
 ision of\nabout 0.2 microns was achieved for a distance of about 40 cm for
  the\nprototype. Work is now under way to demonstrate a multi-channel syst
 em\non the bench. Recent progress will be summarized.\n\nhttp://indico.cer
 n.ch/contributionDisplay.py?contribId=104&sessionId=10&confId=129980
LOCATION:Rhode Island Convention Center 556
URL:http://indico.cern.ch/contributionDisplay.py?contribId=104&sessionId=1
 0&confId=129980
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