Planned activities on collimator for LS1 O. Aberle – 25/03/13 With input from P. Bestmann, S. De Man and F. Loprete

Main activities during the LS1 TDI.4R8 and TDI.4L2 Collimator exchange Collimator standard maintenance TIM / Robot intervention/observations Alignment Outlook O. Aberle – CWC March 25th 2013

TDI‘s during LS1 until LS2 TDI.4L2 (TDI 001 will be replaced by reconditioned spare (TDI 003) (Oct? – Nov?) TDI.4L2 (TDI 001) will upgraded with the new beam screen and additional temperature sensors, for installation in Pt. 8 Installation in slot TDI.4R8 Old TDI.4R8 (TDI 002) to be reconditioned, prepared as spare Pt. 2 Produce a new TDI 004 as spare for Pt. 8 After LS 1 four TDI’s with new beam screens, two installed, two spares New design for LIU for LS2 O. Aberle – CWC March 25th 2013

Collimator exchange New production of 16 + 4 TCTP New production of 2 + 1 TCSP New production of 2 + 1 TCAPD Preparation of 2 spare TCLP Preparation of 1 spare TCP Layout modification in Pt. 8, removal of 2 TCTVB, shifting TCLIA Pt. 1: Replacement of 4 TCT + by 4TCTP + installation of 2 TCLP Pt. 2: Replacement of 2 TCT + 2 TCLP by 4 TCTP Pt. 3: Installation of 2 new TCAPD Pt. 5: Replacement of 4 TCT + by 4TCTP + installation of 2 TCLP Pt. 6: Replacement of 2 TCS by 2 TCSP Pt. 7: Remove first two TCP per beam during ventilation door installation (to prevent damage) and exchange the skewed TCP of IR7L Pt. 8: Replacement of 2 TCT + 2 TCTVB by 4 TCTP O. Aberle – CWC March 25th 2013

Collimator standard maintenance Check each collimator mechanics and electronics. Cycle from out to in, to anti-collision and back to out. Check 5th axis for clearance Check water cooling flow Check temperature sensors Check switches, LVDT’s, resolvers, motors and drivers Map sound profile for each collimator Check rails Check roller screws O. Aberle – CWC March 25th 2013

Collimator roller screw replacement (2011-12) Dust and debris in the end cap and the housing Some dry screws regreased Up to date 3 rollers screws have been exchanged. -No linear bearing -2 LVDT‘s -1 motor -2 switches O. Aberle – CWC March 25th 2013

TIM and Robot intervention Sound inspection of the collimators done with the TIM in S34 (23/24 April 2012). Visual and acoustic inspections with camera can be useful in the future (TIM automatically, Telemax robot more flexible). Vacuum disconnection testing with the Telemax robot on-going. Use of robot for visual inspections/leak tests (He spray). Profit from the long shutdown to verify the integration and do some hardware tests to confirm the procedures. O. Aberle – CWC March 25th 2013

Alignment Survey is working in the whole machine. During smoothing, magnets will be aligned and collimators checked (and adjusted if needed). IR 3 and IR 7 are equipped with additional targets for remote verification with the stretched wire. New collimators (TCTP, TCSP and TCAPD) will be aligned. The TCP’s removed during the installation of the ventilation doors + the skewed TCP in IR7L to be checked (high radiation levels, how much deviation can be tolerated?). O. Aberle – CWC March 25th 2013

Outlook Improve the sound and image quality for the TIM, very powerful tool for the future. Investigate on the capabilities of the Telemax or similar robots for inspections and interventions. Reference sound recording of all collimators. Improve the accessibility to the screw (cap) (Phase 2!) A regular check during long breaks and shut-downs with re-lubrication of the screw. Automatic motion cycles during LS1 to be planned. Check every slot for 5th axis motion limitations. O. Aberle – CWC March 25th 2013