Inner Triplet Review 1 H. Prin AT/MEL Activities on the triplets at CERN Reception and Acceptance Triplet String Assembly in Building 181 Handling and Transport Preparation for Installation Tests carried out in the tunnel Repairs Present Status

Inner Triplet Review 2 H. Prin AT/MEL Reception and Acceptance Acceptance tests to be performed following shipment:  Q1: Acceptance Plan for LQXA LHC-LQX-TP-0002  Q2: Acceptance Plan for LQXB LHC-LQX-TP-0001  Q3: Acceptance Plan for LQXC LHC-LQX-TP-0003  DFBX : Acceptance Plan for Inner Triplet Distribution Feedboxes LHC-DFBX-ES-0001  D1 : Acceptance Plan for Beam Separation Dipoles LBX LHC-MBX-ES-0003 Tests to be perform at CERN according to these documents  Physical inspection  Mechanical measurements  Electrical measurements Coil resistance Quench protection heater resistance Coil inductance Insulation resistance Leakage current measurements Thermometer resistance Warm-up heater resistance

Inner Triplet Review 3 H. Prin AT/MEL Reception and Acceptance Physical inspection in Building 181  Visual inspection of containers and shockwatches fasten on it  Removal of the container and inspection of the transport restraints  Transport data recorder return to sender for analysis  Removal of transport restraints and “spider” inspection

Inner Triplet Review 4 H. Prin AT/MEL Reception and Acceptance Electrical measurements in Building 181  Electrical checks and measurements Coil resistance Quench protection heater resistance Coil inductance Insulation resistance Leakage current measurements Thermometer resistance Warm-up heater resistance Continuity of leads, busses and instrumentation for the DFBX  Polarity checks using a rotating mole  Leak checks on the internal pipes of the DFBX

Inner Triplet Review 5 H. Prin AT/MEL Reception and Acceptance Geometrical measurements in Building 181  Alignment stability Cold mass length Cryostat length Cartography of the tubes at the cold mass ends Cold mass horizontal and vertical shapes Position of the cold mass within the cryostat Comparison with FNAL data OR  Fiducialisation Same as above with different measurement methods Geo Mole + AC Mole measurements to increase the accuracy on the magnetic axis determination

Inner Triplet Review 6 H. Prin AT/MEL Triplet String in Building 181 String assembled in April 2005 with the collaboration of FNAL, AT/CRI, AT/MEL, AT/VAC, TS/IC, TS/SU  Check availability of components and tooling  Assemble interconnects, check tooling and procedures  Perform instrumentation and continuity checks for the string from DFBX  Mount and check alignment equipment  Check string behaviour under insulation vacuum  Check handling equipment

Inner Triplet Review 7 H. Prin AT/MEL Triplet String in Building 181 What was learned:  Validation of most components and tooling for the interconnections  Demonstration of interconnect procedures in conditions close to the ones in the tunnel  Polarity of magnets confirmed in the string  Instrumentation and continuity from DFBX confirmed  Alignment of magnets under vacuum confirmed  Limited rigidity of the jacks and their supports Actions:  Some tools and components had to be improved  Procedures were refined  BPMS signal cables redesign due to interference with Q2 thermal shield  Thermal shield of DFBX/D1 interconnection had to be modified  A software bug corrected in survey applications

Inner Triplet Review 8 H. Prin AT/MEL Handling and Transport Mean(s)ContainerRestraintsData Recorder US to CERN Truck / Boat / (Plane) Q1/Q3Fixation on transport Frame inside a metallic container1 per side Shockwatch Acceleration Recorders Q2Fixation on transport Frame inside a wooden box1 per side D1Fixation on transport Frame inside a metallic container1 per side DFBXFixation on transport Frame inside a wooden boxSprings 181 ↔ storage ↔ Smi2 Truck Q1/Q3 1 per side Schocklogs Q21 per side D11 per side DFBXcovered truck Smi2 ↔ 181 ↔ storage Truck Q1/Q3 1 per side Schocklogs Q21 per side D11 per side DFBXcovered truck Installation Truck Q1/Q3 1 on the non IP side Schocklogs Q2 1 on the non IP side D1 1 on the non IP side DFBXcovered truck

Inner Triplet Review 9 H. Prin AT/MEL Handling and Transport radial direction (R) longitudinal direction (S) vertical direction (T) HCLQXA_001-FL HCLQXA_001-FL HCLQXA_001-FL HCLQXA_001-FL HCLQXA_001-FL HCLQXA_001-FL HCLQXA_001-FL HCLQXA_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXB_001-FL HCLQXC_001-FL HCLQXC_001-FL HCLQXC_001-FL HCLQXC_001-FL HCLQXC_001-FL HCLQXC_001-FL HCLQXC_001-FL RMS HCLQXA_001-FL HCLQXC_001-FL HCLQXC_001-FL Cold mass displacements within the cryostat during transport from the US To CERN 3 assemblies were broken during transport probably due shocks between wagons as they were shipped by train : Q3R8 cold mass has moved by ~3mm during transport to the tunnel without any shocklog alarm

Inner Triplet Review 10 H. Prin AT/MEL Preparation for Installation Mechanical preparation to put the different interfaces in conformity  Thermal shield modification of the D1  Flange replacement to remove NCs (D1 and DFBX) Preparation in Smi2  Cold bore cleaning  Beam screen insertion  Pick up connection  Cold warm transition assembly  Thermal shield closing  MLI insulation  O-Ring seals installation  Vacuum vessel closing  Bearing pieces fixation Preparation of the DFBX in 181  Electrical instrumentation preparation  Frames assembly and instrumentation box  Warm gas recovery line assembly and vacuum test  Control valves installation on each line  Differential pressure valves installation

Inner Triplet Review 11 H. Prin AT/MEL Tests carried out in the tunnel Vacuum tests in L8 (22 Sept. 06) and R8 (17 Nov. 06)  Monitoring the various displacement of the assemblies and supporting system under insulation vacuum Result: OK  Go ahead with the pressure test

Inner Triplet Review 12 H. Prin AT/MEL Tests carried out in the tunnel Pressure test in L8  Guarantee the inner triplet piping mechanical stability under He pressure at warm Result: Test interrupted at 12 bars by X line buckling Cause of rupture : brazed joints anneals the extremities of the tubes  All the exchanger tubes in Q1, Q2, Q3 have to be replaced  Pressure test L5 after repair to qualify X line replacement and the complete design Design Pressure Test Pressure LD1/LD221 bars26bars CY/XB5bars6bars

Inner Triplet Review 13 H. Prin AT/MEL Tests carried out in the tunnel Pressure test in L5 (27 march 2007)  Guarantee the inner triplet piping mechanical stability under pressure  Validate the new X line along the triplet (copper corrugated tube + interconnections)  Monitor the H pieces displacement under pressure Result: Test interrupted at 20 bars when the support system broke and M1 bellows ruptured Cause of rupture: axial movement of Q1 cold mass towards the IP  The heat exchanger circuit remained leak tight even after the cold masses displacement  X line replacement on the other triplets continue as planed  The cold mass support system of all Q1 and Q3 has to be reinforced

Inner Triplet Review 14 H. Prin AT/MEL Repairs “Spiders” replacement on the 3 assemblies that were broken during shipment to CERN Removal from the vacuum vessel MLI and thermal shield removal “Spider” exchange (3/4) or repair (1/4) Cold mass recryostating Leak test of pipes that were cut to remove the spiders

Inner Triplet Review 15 H. Prin AT/MEL Repairs X tube removal and installation of new tubes Removal of the heat exchanger tube  Removing the vacuum vessel dome in front of Q1  Cutting fix point between L and X lines on Q1 and Q3  L line extremities cutting  Extracting the copper corrugated tube Installation of the new heat exchanger tube  Replacement of L line flanges and M4 line bellow  Insertion of the new copper corrugated tube  Welding fix points at the extremities Interconnection of the X, L and M4 circuits (see C. Garion’s presentation)  Installation of the “H” pieces  Welding X line  Leak test of the exchanger circuit from the Q1 to Q3  Welding M4 and L lines  Leak test on the cold mass circuit

Inner Triplet Review 16 H. Prin AT/MEL Present Status R1L2R2L5R5L8R8 6(/8) triplets were installed in the tunnel 21(/28) cryomagnets and 6 (/8) DFBX were installed 5(/8) triplets were interconnected (at least the bus bars connections) 2(/8)triplets were pressure tested in the tunnel 15(/24) new exchanger tubes were produced 10(/24) exchanger tubes were exchanged 3 cryomagnets and one DFBX have to come out of the tunnel 1 cryomagnet have to be replaced by its spare and has to be de-cryostated to exchange the supports

Inner Triplet Review 17 H. Prin AT/MEL Standard actions summary and information

Inner Triplet Review 18 H. Prin AT/MEL Additional tests on the spiders  i max sample 1 = MPa  i max sample 2 = MPa The tests were initially intended to merely assess a possible prematurate breakdown occurring at limited flexural strain at break. For this reason and due to the limited size of the available material, two non normalised specimens have been machined radially for flexural testing. Three-point loading test, load applied at midspan, direction of force normal to the plane of the running of the fibers. Results (values are qualitative due to non-standard sample geometry and set-up): Average flexural stress at break = 316 MPa Average flexural strain at break = 3.3 % Average modulus of elasticity in flexure = 12.7 GPa

Inner Triplet Review 19 H. Prin AT/MEL Additional tests on the spiders F Q3 supporting system rigidity = 0.49mm/ton

Inner Triplet Review 20 H. Prin AT/MEL Additional tests on the spiders Q2 supporting system rigidity = 0.43mm/ton

Inner Triplet Review 21 H. Prin AT/MEL Additional tests on the spiders Q1 supporting system rigidity = 0.66mm/ton