update on survey needs w.r.t. crab cavities installation
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UPDATE ON SURVEY NEEDS w.r.t. CRAB CAVITIES INSTALLATION
5th HL-PLC meeting, 2/07/2013
D. Missiaen on behalf of H. Mainaud
2
Within +/- 0.1 mm ? (1σ)
Initial alignment (absolute position)
SmoothingFiducialisation
Alignment Strategy
Within +/- 0.1 mm (1σ)
Monitoring of the relative position
Re-adjustment if needed
Within a few µmBeam
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.
Crab cavitiesCrab cavities
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
Crab cavitiesCrab cavities
550 mm
950 mm
Cryo Jumper
RF In/Out
[Prelim] IR Layout of Crab CavitiesRama Calaga, HL-LHC PLC Meeting, Jan 2013
Space reservation for alignment systems
Tunnel cross section
Confirm the space reservation for the cryo-jumpers of the cavity cryostat (not to scale on the cross section) [Rama Calaga]
Alignment requirements for the crab cavities [Rama Calaga]: Precise the alignment requirements for the crab cavities, concerning the
fiducialisation, the initial alignment. Is a monitoring of the alignment of the crab cavities needed? Taking account of the radiation level in the area, will a remote adjustment
needed?
Book the corresponding space reservation on all the other cryostats (from Q1 to Q4) [Hélène Mainaud Durand and integration team?]
Next steps
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