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Status of the LARP Phase II Secondary Collimator Prototype 30 September 2013 LHC Collimation WG Meeting Tom Markiewicz/SLAC BNL - FNAL- LBNL - SLAC US.

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Presentation on theme: "Status of the LARP Phase II Secondary Collimator Prototype 30 September 2013 LHC Collimation WG Meeting Tom Markiewicz/SLAC BNL - FNAL- LBNL - SLAC US."— Presentation transcript:

1 Status of the LARP Phase II Secondary Collimator Prototype 30 September 2013 LHC Collimation WG Meeting Tom Markiewicz/SLAC BNL - FNAL- LBNL - SLAC US LHC Accelerator Research Program 6 September 2013

2 Collimator Assembled 13-Mar-11 Mechanical & Resistance Tests Good LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 2 / 18

3 Collimator Assembled 18-Sept-13 Mechanical & Resistance Tests Good LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 3 / 18

4 Continuous 15m copper tube wrapped on copper mandrel Tube enters from far end of mandrel then begins spiral to provide ~1m free length that can twist to allow rotation 25mm thick Glidcop “jaw” brazed to mandrel 20 “20mm wide facets” 25um flat are the collimating surfaces Molybdenum shaft with 2mm “heat expansion gap” from mandrel Mandrel held at midpoint only by a brazed Glidcop “hub” Jaw Designed to Minimize Thermal Distortion 1 hour beam→12kW with 10 second transients x5→60kW LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 4 / 18

5 New Bearing Restraint LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. Markiewicz “Naked” Hub Screwed to AxleBearing on HubSpacer Ring & Bearing in Housing Bearing RestraintRing, Bearing in Housing & ClipOversize Outer Housing w/ Flats that prevent rotation in jaw supports Slide n° 5 / 18

6 New RF Bearing Assembly LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. Markiewicz Ceramic bearing in race & the 2 rings that capture it Assembled bearing package that will hold the RF Foil Trapped bearing in ring that is fixed to the collimator jaw Attaching outer ring to collimatorCloseup of ridge where bearing rolls Before outer ring screwed on Slide n° 6 / 18

7 Final RF Bearing Installed LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 7 / 18

8 BeCu Foils, Rhodium plate “wipers”, Clamps to keep RF Bearing Package from Dragging LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. Markiewicz Foils, wipers & clamps Thermistor/Foil/Wiper Holder Holder w/Wiper/Foil Attached Beam-side View View Behind Foil w/ Clamp ATtached Slide n° 8 / 18

9 Welding Flanges Attached to Tank Cover and Baseplate LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 9 / 18

10 Dry Fit Cover to Baseplate & test Rotation w/Foils Attached LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 10 / 18

11 Resistivity Test: 1 mOhm/side LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 11 / 18

12 Jaw Alignment & CMM LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 12 / 18

13 Final Adjustment of Actuator & Drive Wheel (relative to Inner Limit Switch) LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. Markiewicz Remember to play movie Slide n° 13 / 18

14 Leak Test Cooling Tubes (most recent) Pressure & Leak Rate LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. Markiewicz Left Jaw (AC)Right Jaw (BD) Slide n° 14 / 18

15 Prep & “CuSil” the Cooling Tube to the Bellows Feedthrough LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 15 / 18

16 Need Today to Remove Spring to CuSil the Remaining Two Tubes LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 16 / 18

17 Work List After that, wind 2 nd mandrel, then ………….. Prep with strips & braze coils and inner hub/shafts to mandrels (2 of 2 done) Machine assembly round & concentric to axis at diameter to accept Glidcop jaws Machine & Cu plate Glidcop jaws Prep and braze jaws to mandrels (2 nd done 8-Apr-13) Machine facets, end features (2 nd done 28-May-13) Install RF bearing housing Install shaft support bearings and rotation drives Test prior to installation in vacuum system Prep existing vacuum base plate to receive new collimators Mount, align & test Decide details of how vacuum cover will be attached to vacuum base plate & machine appropriately Mate cover & baseplate Test rotation after welding, pre and post vacuum Vacuum bakeout Test after bakeout Ship Begin 3-June-2-13 SLAC SLAC? LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 17 / 18

18 At SLAC After CuSil test for tube integrity Clamp vacuum cover in place, attach foils & test rotate 1 facet Weld cover, vacuum test all welds & CuSil joints Final full facet test rotation in vacuum Solder metric water fittings, pressure test then dry & leak test tubes again Immobilize jaws & ship (in 2 weeks time?) At CERN Decide whether to open vacuum seal or not Off beam tests: Function, metrology, impedance, vacuum Bakeout (???) SPS tests (???) Hi Rad Mat Tests & Subsequent Analysis Suggested Plan That Needs More Discussion LHC Collimation WG Mtg - 30 Sept 2013LARP RC Status - T. MarkiewiczSlide n° 18 / 18

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