1. R. Ostojic CERN, AT Department

2. 2 LHC Insertions Experimental insertions in points 1, 2, 5, 8 contain low-beta triplets. In total, eight triplets are installed.

3. 3 The LHC low- triplet MQXAMQXBMQXAMQXB 6.375.5 6.37 MCBXAMCBXMQSX TASB MCBX Q3Q2Q1 MCSOX DFBX LBX D1 IR 1 and 5, D1 is a normal conducting dipole. DFBX Triplets were designed and built by a collaboration of five laboratories: BNL, CERN, Fermilab, KEK, LBNL.

4. 4 Design and manufacture Magnets –MQXA (Q1, Q3)KEK –MQXB (Q2)Fermilab –CorrectorsCERN –MBX (D1)BNL Cryostats –Q1, Q2, Q3Fermilab –D1BNL DFBX LBNL, Fermilab Interconnects Design –Q1-Q2, Q2-Q3, Q3-DFBXFermilab –D1-DFBXBNL, Fermilab ExecutionCERN Jacks and tunnel installation CERN

5. 5 Design specifications and documents All design specifications and solutions are documented in the functional and interface specifications. These documents were released following collaboration meetings and independent reviews, and after a formal review procedure in the CERN EDMS. (EDMS documents: LHC-LQX-ES%, LHC-DFBX-ES%, LHC-MBX-ES%). Acceptance procedures for all magnets and DFBX are defined in appropriate Acceptance Plans, also formally reviewed in CERN EDMS. (EDMS documents: LHC-LQX-TP%, LHC-DFBX-ES-0001, LHC-MBX-ES- 0003). Safety related procedures and documents were reviewed by competent bodies in participating laboratories following the Memoranda of Understanding. (http://sc-gs.web.cern.ch/sc-gs/gs_ms/TISUS/)

6. 6 Key dates Design and development1998-2002 Production2001-05 Delivery at CERN2003-07 First triplet assembly at CERNApril 2005 First triplet in tunnel (8L)Dec 2005 Triplet in 8L under vacuumJune 2006 Pressure test of Sector 7-8 (8L)Nov 2006 Repair of HX in all triplets Feb-May 2007 Pressure test of triplet in 5LMar 2007

7. 7 Schematics of the mechanical design MQXAMQXBMQXAMQXB Q3Q2AQ1 DFBX Q2B 38490 MQXB LBX D1 External heat exchanger (HX) Fixed Point HX-Cold Mass FP Cold Mass- Vacuum Vessel Fixed Point Triplet- Tunnel Floor Tie Rods Linking Vacuum Vessels Jacks (longitudinal) Internal heat exchanger For details see dwg. LHCLSX__0001 and LHCLSX__0003.

8. 8 LHC low- triplet – Q2 External heat exchanger GRP spider MQXB quadrupoles

9. 9 LHC low- triplet – Q1 MQXA quadrupole End domes and cryo- piping assembled by Fermilab

10. 10 LHC low- triplet – D1 MBX = RHIC dipole Internal heat exchanger

11. 11 LHC low- triplet – DFBX

12. 12 LHC low- triplet – warm assembly

13. 13 Q1 - Q2 interconnect

14. 14 Q1 - Q2 interconnect

15. 15 Q1 - Q2 interconnect closure

16. 16 Q2 - Q3 interconnects – TAS B

17. 17 Q3 - DFBX

18. 18 DFBX - D1

19. 19 DFBX - D1