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UPDATE ON SURVEY NEEDS w.r.t. CRAB CAVITIES INSTALLATION

UPDATE ON SURVEY NEEDS w.r.t. CRAB CAVITIES INSTALLATION. 5th HL-PLC meeting, 2/07/2013. D. Missiaen o n behalf of H. Mainaud. Alignment Strategy. Monitoring of the relative position Re-adjustment if needed. Initial alignment (absolute position) Smoothing. Fiducialisation.

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UPDATE ON SURVEY NEEDS w.r.t. CRAB CAVITIES INSTALLATION

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  1. UPDATE ON SURVEY NEEDS w.r.t. CRAB CAVITIES INSTALLATION 5th HL-PLC meeting, 2/07/2013 D. Missiaenon behalf of H. Mainaud

  2. Alignment Strategy Monitoring of the relative position Re-adjustment if needed Initial alignment (absolute position) Smoothing Fiducialisation Within +/- 0.1 mm ? (1σ) Beam Within +/- 0.1 mm (1σ) Within a few µm

  3. Survey needs  Monitoring & smoothing • Space requirements: • In H direction • [Stretched wire and associated sensors] : Integration of a continuous straight line (cylinder dia. 100 mm), straight above fiducials of components, on the transport side (for an easy access in case of maintenance), plus space for wire stretchers along Q1 and the last component. • [left / right link]: one additional fiducial on the cryostat in front of each boreholes coming from the UPS galleries, and a continuous line between the borehole and associated fiducial. Crabcavities Crabcavities

  4. Survey needs  Monitoring & smoothing • Space requirements: • In V direction • [Water surface and associated sensors]: horizontal lines (cylinder dia. 100 mm), by levels (as the tunnel is in slope) linking from time to time fiducials on the cryostats Crabcavities Crabcavities

  5. Tunnel cross section RF In/Out Cryo Jumper Space reservation for alignment systems 550 mm 950 mm [Prelim] IR Layout of Crab Cavities Rama Calaga, HL-LHC PLC Meeting, Jan 2013

  6. Next steps • Confirm the space reservation for the cryo-jumpers of the cavity cryostat (not to scale on the cross section) [Rama Calaga] • Alignmentrequirements for the crabcavities[Rama Calaga]: • Precise the alignmentrequirements for the crabcavities, concerning the fiducialisation, the initial alignment. • Is a monitoring of the alignment of the crabcavitiesneeded? • Takingaccount of the radiation level in the area, will a remoteadjustmentneeded? • Book the corresponding space reservation on all the other cryostats (from Q1 to Q4) [Hélène Mainaud Durand and integration team?]

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