LiCAS-RTRS

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The ILC requires unprecedented accuracy, speed
and cost efficiency for the survey and alignment
of its more than 100km of beamline. Classical
optical metrology in open air cannot meet these
requirements. The Rapid Tunnel Reference Surveyor
(RTRS), a self-propelled survey train, is
intended to automatically survey a reference
network in the ILC tunnels with an accuracy of
200 (500) microns vertical (horizontal) over each
600 m segment. A prototype RTRS has been built by
the LiCAS collaboration. Calibration and first
measurements are ongoing. Armin Reichold,
Patrick Brockill, Sigal Cohen, John Dale, Mike
Dawson, Tony Handford, Mark Jones, Gregory Moss,
Lee Antony Rainbow, Michael Tacon, Cecilia Uribe
Estrada, David Urner, Roy Wastie, Stephanie
Yang The John Adams Institute for Accelerator
Science, University of Oxford, Department of
Physics, Denys Wilkinson Building, Keble Road,
Oxford, OX1 3RH, UKJohannes Prenting, Markus
Schloesser DESY Applied Geodesy Group, DESY,
Notkestrasse 85, 22607 Hamburg, Germany Grzegorz
Grzelak University of Warsaw, Department of
Physics, Warsaw, Poland
LiCAS-RTRS