1. LARP Rotatable Collimators for LHC Phase II Collimation 18 April 2007 LARP Collaboration Meeting – Fermilab Tom Markiewicz/SLAC Representing Gene Anzalone, Eric Doyle, Lew Keller & Steve Lundgren BNL - FNAL- LBNL - SLAC US LHC Accelerator Research Program

2. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 2 / 59 Collimator Design as of April 2006 beam 136mm diameter x 950 mm long copper jaws (750 mm effective length + 2 x 100mm tapers) Vacuum tank, jaw support mechanism and support base derived from CERN Phase I

3. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 3 / 59 EXTERNAL COIL PERMITS 1 REV OF JAW CERN PHASE I JAW POSITIONING MECHANISM – USE IF POSSIBLE 25mm thick annular (hollow core) copper jaw backed by continuous helical cooling tube Collimator Design as of April 2006 NLC Jaw Ratchet Mechanism assumed Sheet Metal formed RF transition

4. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 4 / 59 Stop prevents thermal bowing of jaws from intruding on minimum gap. Deal with: Residual swelling into beam External vertical actuator and bellows that also has +/- 5mm transverse float Mid-jaw recess Forces possibly unbalanced front vs. back Leaf springs allow jaw end motion up to 1mm away from beam. Must allow: Thermal motion while minimizing gravity-deflection Axial expansion Adjustable central aperture-defining stop and leaf spring support required to prevent jaws from deforming 1200um into beam

5. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 5 / 59 One Year Later… New jaw-hub-shaft design which eliminates central stop & flexible springs New reverse-bend winding concept for the cooling coil which eliminates the 3 end loops, permitting longer jaws and freeing up valuable space for jaw supports, rotation mechanism and RF-features Internally actuated drive for rotating after beam abort damages surface These concepts discussed at October 2006 collaboration meeting Main accomplishments in the last 6 months Several test pieces manufactured and examined Rotation & support mechanism fully designed All parts for first full length jaw assembly manufactured & in-house Test lab fully wired, plumbed and equipped BUT… –Still have not brazed nor thermally tested a full length jaw assembly –Still do not have a complete mechanical (=“RC1”) prototype

6. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 6 / 59 http://www-project.slac.stanford.edu/ilc/larp/ Monthly meetings with CERN Up-to-date in labeled folders Written version of this talk

7. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 7 / 59 Advances since RC1 Baseline solid core more cooling

8. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 8 / 59 New Idea to Eliminate Central Stop Jaw-Hub-Shaft 1.Hub located, in Z, near peak temperature location, which lowers peak temperature, reducing gradient and bending. 2.Max deflection toward beam reduced if the shaft deflection can be minimized 3.Both ends of jaw deflect away from beam. (Note: swelling component of deflection is not corrected.) 4.Cooling coils embedded in I.D. of outer cylinder. shaft jaw hub

9. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 9 / 59 Evaluate jaw-hub-shaft for 950mm jaws w / 22.5mm deep cooling tubes with hollow Moly shaft versus 750mm jaw baseline & 750mm jaw solid copper shaft refined baseline Notes: 1.Deflection means deviation from straight (um). 2.Eff length is length of jaw (m) deflected <100 um compared to maximum deflection point. 3.Deflection is combination of swelling and shaft bending 4.Molybdenum shaft static deflection due to gravity = 68um 5.7  min allowable aperture achieved by setting jaws of first collimator at 8.5 . New Baseline

10. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 10 / 59 Model showing 42.5 winds of coil on Mandrel with 80mm wide space for U-Bend at downstream end Restrain each tube on centerline of bearing 200mm 136mm dia

11. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 11 / 59 Comparison of Hollow Mo shaft and Solid Copper Shaft to same FLUKA secondaries: Improved deflections Solid Cu, 75cm tapered jaw, asymmetric hub Tubular Moly, 95 cm straight jaw, symmetric hub Steady State  =1 hour  = 12 min for 10 sec Steady State  =1 hour  = 12 min for 10 sec Gravity sag200 um67.5 um Power absorbed11.7 kW58.5 kW12.9 kW64.5 kW Peak Temp.66.3 °C197 °C66 °C198 °C Midjaw  x 100 um339 um83.6 um236 um Effective Length51 cm25 cm74 cm39 cm Sagitta221 um881 um197 um781 um

12. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 12 / 59 October 2006 Version of Jaw Upstream end with actuator and cooling lines Lundgren

13. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 13 / 59 Current Upstream end with actuator and cooling lines

14. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 14 / 59 Universal Joint Drive Axle Assembly Thermal Expansion of molybdenum Shaft of 0.290mm (transient) causes each diaphragm to distort by 0.145mm. Shaft sag causes an in plane rotation of the Shaft ends of 0.00025 radians causing an equal distortion of the diaphragm. Transverse displacement one of the ends of the Shaft relative to the other by +/- 1.5mm causes an angular distortion of 0.0015 radians in the diaphragm. Worst case is for a Vertical Collimator with maximum “slew” of 0.0015 radians added to the sag component of 0.00025 radians for a total of 0.00175 radians of bending of the diaphragm. Lundgren

15. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 15 / 59 Jaw Mount with Geneva MechanismGeneva Mechanism 0.5mm thick diaphragm 100 Tooth Worm Gear Geneva Driver Wheel (on ratchet shaft) Geneva Driven Wheel (on Worm shaft) Lundgren Linear actuator

16. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 16 / 59 Upstream end vertical section Jaw Geneva Mechanism Support Bearings Worm Gear Shaft Water Cooling Channel U-Joint Axle Lundgren 1-2mm Gap Diaphragm

17. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 17 / 59 Upstream end horizontal section Support to Support 1000mm Overall length 930mm Facet length ~905mm Lundgren Collimating SurfaceRF Transitions

18. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 18 / 59 Summary of New Baseline Configuration Jaw consists of a tubular jaw with embedded cooling tubes, a concentric inner shaft joined by a hub located at mid-jaw –Major thermal jaw deformation away from beam –No centrally located aperture-defining stop –No spring-mounted jaw end supports Jaw is a 930mm long faceted, 20 sided polygon of Glidcop Shorter end taper: 10mm L at 15 o (effective length 910mm) Cooling tube is square 10mm Cu w/ 7mm square aperture at depth = 24.5 mm Jaw is supported in holder –jaw rotate-able within holder –jaw/holder is plug-in replacement for Phase I jaw Nominal aperture setting of FIRST COLLIMATOR as low as 8.5  –Results in minimum aperture > 7  in transient 12 min beam lifetime event (interactions with first carbon primary TCPV) –Absorbed power relatively insensitive to aperture: for 950mm long jaw p=12.7kW (7  ), p=12.4kW (8.23  ) Auto-retraction not available for some jaw orientations Jaw rotation by means of worm gear/ratchet mechanism  “Geneva Mechanism”

19. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 19 / 59 RF Shielding: Baseline Design Tie-Rods with Fingers Connect Jaws & Tank Issues: –At a few 10s of grams per finger (.1 mΩ/contact) force causes excessive deflection of the tie-rod holding fingers –Cooling required Discussions with CERN and PeP-II experts in progress Tie-Rods

20. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 20 / 59 Revised RF Spring configuration Double Wedge Adapters mount across Tank ceiling & floor 2 RF springs mount to each Adapter Jaw facet RF springs mount on Tank ceiling & floor Shorter length springs also mount to Tank ceiling & floor Note: Jaw facet springs are wide enough for line contact thru full transverse travel range

21. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 21 / 59 Alternate Sheet Metal Transition configuration NORMALCONTACTS TO TANK CEILING & FLOOR ROUND RECTANGULAR HOURGLASS RETRACTED 22.5MM Note: Not all Jaw facets are shown

22. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 22 / 59 BrazeTest #1 Cooling Tube Jaw Center Mandrel ~100 mm ~70 mm dia ~100 mm dia

23. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 23 / 59 Aluminum Mandrel for Coil Winding Test and to test 3-axis CNC Mill before cutting 200mm and 950mm Copper Mandrels 200mm Cooling Tube aligner

24. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 24 / 59 Development of Winding Tooling Vise-Type Roller-Type Aluminum Mandrel with Coil Wound Test Winding the 200mm Copper Mandrel

25. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 25 / 59 Fabrication of Quarter Jaws for 2 nd Braze Test

26. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 26 / 59 Final Wind of 200mm Copper Mandrel

27. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 27 / 59 First 200mm Prototype Before-After Brazing Coil to Mandrel 4 braze cycles were required before part deemed good enough to do jaw braze Learned a lot about required tolerances of cooling coil and mandrel grooves Pre-Coil-Braze

28. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 28 / 59 More Winding Tooling Developed 1m winding tooling Mill vise as precision bender

29. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 29 / 59 1mm raised shoulder (Hub) at center Full Length Molybdenum Shaft

30. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 30 / 59 Braze Test#2 Delivered 19 Dec 2006

31. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 31 / 59 Vacuum Bake Test Results: 4/1/07 1st Jaw Braze Test Assembly has been vacuum baked at 300 degrees C for 32 hours. LHC Requirement = 1E-7 Pa = 7.5E-10 Torr Baseline pressure of Vacuum Test Chamber: 4.3E-7 Pa (3.2E-9 Torr) Pressure w/ 200mm Jaw Assy. in Test Chamber: 4.9E-7 Pa (3.7E-9 Torr) Presumed pressure of 200mm lg. Jaw Assy.: 6.0E-8 Pa (4.5E-10 Torr) Note: above readings were from gauges in the foreline, closer to the pump than to the Test Chamber. Pressures at the part could be higher. Plan to discuss vacuum results with SLAC experts (Dan Wright) and to possibly incorporate vacuum pumpout drill holes into the design. Next step: Sectioning & braze quality examination

32. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 32 / 59 Aluminum Test Mandrel with 80mm Gap for Downstream U-Bend (11/17/06)

33. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 33 / 59 Braze Test #3: 200mm Cu mandrel with U-Bend Upstream end Downstream end Minor re-machining required to engage drive pins of coil winding tooling

34. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 34 / 59 Tubing Wound and Tack Welded to Mandrel at the U-Bend Note stub ends of cooling tube

35. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 35 / 59 Braze Test #3: Ready in Braze Lab for coil-mandrel braze Next steps: -Braze 8 quarter-round half-length jaws -Vacuum test? -Section & examine braze quality

36. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 36 / 59 Cut-away of Cu-Mo Hub CAD Model #1 - Mandrel Dummy #2 - Mo Shaft Dummy #3 - Mo Backing Ring #4 - Cu Hub with braze wire grooves #2 #1 #3 #4 Initial plan to braze one long Mo shaft with raised hub to inner radius of Cu mandrel deemed unworkable Brazing HALF-LENGTH shafts to a COPPER hub piece and THEN brazing the Cu hub to the Cu mandrel deemed possible First test if Mo “backing ring” sufficient to keep Mo and Cu in good enough contact for a strong braze joint

37. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 37 / 59 Cu-Mo Hub Braze Test parts #1 - Mandrel Dummy (not shown) #2 - Mo Shaft Dummy #3 - Mo Backing Ring #4 - Cu Hub with braze wire grooves #2 #3#4

38. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 38 / 59 Sectioned Cu-Mo Hub Braze Test Assembly after 3 additional heat cycles to mimic full assembly procedure #1 - Mandrel Dummy #2 - Mo Shaft Dummy #3 - Mo Backing Ring #4 - Cu Hub #2 #3#4 #1

39. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 39 / 59 Moly-Cu Joint Declared “Good” by SLAC Braze Shop Experts, but….. Small holes held braze wire Grain boundary issues? Possible fracturing? Samples being sliced & polished and sent to Physical Electronics lab for analysis Cu-Mo joints we care about 1mm expansion gap

40. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 40 / 59 More Coil Tests Planned Twist a length of actual cross-section to failure for a measure of the margin of safety and maximum torque requirements. Bend samples of actual cross-section into required configurations. Section samples to inspect for internal distortion shapes and smoothness of transitions. 4-1/2 Turns without failure

41. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 41 / 59 Full length Mandrel: In-House & Inspected –Most groove widths meet specification except for a few at each end. –Positioning of distorted areas could indicate damage was done by excessive forces imparted by hold down fixturing during machining. –Future Mandrel drawings will include a note warning about potential damage caused by excessive clamping forces. out of specification grooves

42. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 42 / 59 Up Beam Flex Mount Assembly components Geneva WheelGeneva Wheel & Actuator (Ultimately, bearings will be ceramic; these steel) SLAC Shops will fab first Universal Joint/Axle and Geneva Wheel Rotator Assembly by June 5

43. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 43 / 59 RF Contact Springs for Investigation

44. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 44 / 59 Main Steps Still Needed for Full Size Single Jaw For Thermal-Mechanical Tests After 200mm Jaw tests Completed Satisfactorily –Jaw 1/4 sections (16 needed of 24 now at SLAC) require slight modifications for braze gap requirements. –Moly shaft (at SLAC) will need to be cut in two pieces and brazed to copper hub –Drill Cu mandrel for Moly Shaft –Decide to use in-house SLAC Copper, or order our own (Finland 20 week delivery) or use CERN order of Ni-Cu alloy, anneal & wind mandrel –Winding and Braze Cycles –Drill jaw to accept resistive heater Understand (ANSYS) any change to expected performance

45. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 45 / 59 Test Lab Preparation ~Finished Clean space with gantry access Basic equipment: Granite table, racks, hand tools Power supplies to drive heaters Chiller & plumbed LCW to cool jaw 480V wiring for heater power supplies required engineering review, safety review, and multiple bids (?!) Acquire Heaters 5kW resistive heaters from OMEGA PC & Labview Rudimentary software tests only National Instruments DAQ with ADCs Data Acquisition and Control Module 32-Channel Isothermal Terminal Block 32-Channel Amplifier Thermocouples Capacitive Sensors –Vacuum or Nitrogen (?) –Safety Authorization (!!!) Adjacent 16.5 kW Chiller Heater Power Supplies staged for installation in rack

46. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 46 / 59 Steps on Path to the Two Jaw Mechanical Prototype RC1 Successful thermal performance of first full length jaw Complete the design of RC1 RF features Successful test of a working model of the Geneva wheel & universal joint Fit-up and initial tests on 1 st full length jaw Complete fabrication of second jaw (Glidcop?, Moly??) with full support assembly on the four corners Remodeling of CERN parts for interface to US parts –Models and assemblies of the various Collimator Mounting Stands are complete –An enlarged vacuum tank has been modeled and some CERN support stand modifications have been identified –No fabrication drawings have been done as yet Acquisition of Phase I support & mover assemblies –CERCA/AREVA REFUSES to supply SLAC –Recent (18 APR 07) proposal to sell SLAC a non-functional CERN TCS collimator with damaged tank & bellows:

47. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 47 / 59 PLASTIC DEFORMATION of ENTIRE JAW after a BEAM ABORT ACCIDENT? PRELIMINARY RESULT: –0.27 MJ dumped in 200 ns into ANSYS model –Quasi steady state temperature dependent stress-strain bilinear isotropic hardening –Result: plastic deformation of 208 um after cooling, sagitta ~130um –Jaw ends deflect toward beam Jaw surfaces at 90 to beam impact useable, flat within 5 um Doyle 54 um Beam side Far side Melted material removed

48. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 48 / 59 Boundary Conditions During energy deposit (0 – 200 ns). All nodes (both ends) constrained in z After energy deposit (200ns – 60 sec), z- constraints released. Original analysis used this constraint at all times.

49. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 49 / 59 Induced Activation of Secondary Phase II Collimators Issue Raised by LARPAC Reviewers 15 mSv/yr = max dose for rad worker at CERN Work in progress by Mokhov et al Have requested dose rate at ~1m

50. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 50 / 59 Inter-Lab Collaboration Good will & cooperation limited only by busy work loads –Three video meetings since October 26, 2006 –Many technical exchanges via email –CERN FLUKA team modeling Rotatable Collimator –CERN Engineering team looking at SLAC solid-model of RC and independently doing ANSYS calculations of thermal shock –CERN physicist investigating effects of Cu jaws at various settings on collimation efficiency Participating in discussion of RF shielding design –SLAC Participation in upcoming CERN Phase II brainstorming meeting –Ralph Assmann to visit SLAC in May/June 2007 Need to continue to pursue –Plan to bring a TCS assembly to SLAC –Plan to bring a spare support and mechanism to set gross x, y, u jaw angles –Plans to understand scope and time scale of beam tests

51. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 51 / 59 Phase II – TCSM FLUKA Model @ CERN Luisella Lari

52. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 52 / 59 Extract from talk by Elias Metral Adressisg RF Concerns of SLAC Collimator Design

53. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 53 / 59 Collaboration on ANSYS Calculations of SLAC Design Performance and Damage

54. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 54 / 59 Collaboration on Tracking Efficiency Studies Chiara Bracco - CERN

55. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 55 / 59 Chiara’s (Frightening) Conclusions

56. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 56 / 59 CERN Collimation Plan & Schedule 0) Assume SLAC LARP develops Rotatable Collimator 1) Develop TWO other complementary designs 2) Develop a test stand for the three designs 3) Fabricate 30 Phase II collimators of chosen design & 6 spares The target schedule for phase 2 of LHC collimation: 2005Start of phase 2 collimator R&D at SLAC (LARP) with CERN support. 2006/7Start of phase 2 collimator R&D at CERN. 2008Completion of three full phase 2 collimator prototypes at CERN and SLAC. Prototype qualification in a 450 GeV beam test stand at CERN. 2009Installation of prototypes into the LHC and tests with LHC beam at 7 TeV. Decision on phase 2 design and production. 2010Production of 36 phase 2 collimators. 2011Installation of 30 phase 2 collimators during the 2010/11 shutdown. Commissioning of the phase 2 collimation system. LHC ready for nominal and higher intensities.

57. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 57 / 59 Summary of Progress since October 2006 Meeting Design & Calculation –Mechanical design almost complete RF shielding concepts need finalization & testing –ANSYS calculations examining permanent deformation in case of accidental beam abort complete Fabrication –Fabricate and braze together a 2 nd short (20cm) copper mandrel, cooling tube and 4- quarter-round jaw pieces Vacuum Bake test complete To be sectioned & examined for braze quality –Fabricate a 3 rd mandrel with improved features & wind cooling coil Await coil braze, 8-jaw braze, vacuum test, sectioning & examination –Acquire first full length mandrel –Acquire first full length Molybdenum shaft Newest design will require it to be cut in half & brazed to a central copper hub –Moly-Copper test braze complete & subject to 4 braze cycles Visual checkout OK; await SEM analysis of Copper-Moly joint

58. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 58 / 59 LARP Collimator Delivery Schedule DoneBraze test #1 (short piece) & coil winding procedures/hardware Prep heaters, chillers, measurement sensors & fixtures, DAQ & lab Section Braze test #2 (200mm Cu) and examine –apply lessons Braze test #3 (200mm Cu) – apply lessons learned Fab/braze 930mm shaft, mandrel, coil & jaw pieces 2007-09-011 st full length jaw ready for thermal tests Fab 4 shaft supports with bearings & rotation mechanism Fab 2 nd 930mm jaw as above with final materials (Glidcop) and equip with rf features, cooling features, motors, etc. Modify 1 st jaw or fab a 3 rd jaw identical to 2 nd jaw, as above Mount 2 jaws in vacuum vessel with external alignment features 2008-04-012 full length jaws with full motion control in vacuum tank available for mechanical & vacuum tests in all orientations (“RC1”) Modify RC1 as required to meet requirements 2009-01-01Final prototype (“RC2”) fully operational with final materials, LHC control system-compatible, prototype shipped to CERN to beam test

59. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 59 / 59 Phase II Task Summary There has been continued progress in design and excellent but slow progress on the necessary small scale projects to finalize procedures. Time estimates for thermal test of first jaw and construction of first 2 jaw prototype (RC1) are expanding. In June 2006 DOE was told “Expect thermal tests and completely tested RC1 device by end of FY06 and mid-FY07, respectively” Now need to say: “Expect thermal tests and completely tested RC1 device by end of FY07 and mid-FY08, respectively” Jeff Smith (Ph.D., Cornell joins SLAC Collimation team ~July 1, 2007 Better project management needed on my part. Need to incorporate schedule in CERN White Paper plan.

60. Extra Material Follows

61. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 61 / 59 Specification Changes Relative to April 2006 Design

62. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 62 / 59 Heat deposited in major components (W/m^3) in 1 hr beam lifetime operation

63. LARP Collab. Mtg. - 18 April 2007Rotatable Collimators - T. MarkiewiczSlide n° 63 / 59 Major jaw dimensions and calculated cooling performance