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R. Ostojic CERN, AT Department

Overview of the LHC Low-beta Triplets. R. Ostojic CERN, AT Department. LHC Insertions. Experimental insertions in points 1, 2, 5, 8 contain low-beta triplets. In total, eight triplets are installed. The LHC low- b triplet. D1. Q3. Q2. Q1. DFBX. TASB. LBX. DFBX. MQXA. MQXB. MQXB.

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R. Ostojic CERN, AT Department

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  1. Overview of the LHC Low-beta Triplets R. Ostojic CERN, AT Department

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

  3. The LHC low-b triplet D1 Q3 Q2 Q1 DFBX TASB LBX DFBX MQXA MQXB MQXB MQXA 6.37 5.5 5.5 6.37 MCSOX MCBXA MQSX MCBX MCBX Triplets were designed and built by a collaboration of five laboratories: BNL, CERN, Fermilab, KEK, LBNL. IR 1 and 5, D1 is a normal conducting dipole.

  4. Design and manufacture • Magnets • MQXA (Q1, Q3) KEK • MQXB (Q2) Fermilab • Correctors CERN • MBX (D1) BNL • Cryostats • Q1, Q2, Q3 Fermilab • D1 BNL • DFBX LBNL, Fermilab • Interconnects Design • Q1-Q2, Q2-Q3, Q3-DFBX Fermilab • D1-DFBX BNL, Fermilab Execution CERN • Jacks and tunnel installation CERN

  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. Key dates • Design and development 1998-2002 • Production 2001-05 • Delivery at CERN 2003-07 • First triplet assembly at CERN April 2005 • First triplet in tunnel (8L) Dec 2005 • Triplet in 8L under vacuum June 2006 • Pressure test of Sector 7-8 (8L) Nov 2006 • Repair of HX in all triplets Feb-May 2007 • Pressure test of triplet in 5L Mar 2007

  7. Schematics of the mechanical design Internal heat exchanger FP Cold Mass-Vacuum Vessel Fixed Point HX-Cold Mass External heat exchanger (HX) D1 Q3 Q2B Q2A Q1 DFBX MQXA MQXB MQXB MQXB MQXA LBX Fixed Point Triplet-Tunnel Floor Tie Rods Linking Vacuum Vessels Jacks (longitudinal) 38490 For details see dwg. LHCLSX__0001 and LHCLSX__0003.

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

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

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

  11. LHC low-b triplet – DFBX

  12. LHC low-b triplet – warm assembly

  13. Q1 - Q2 interconnect

  14. Q1 - Q2 interconnect

  15. Q1 - Q2 interconnect closure

  16. Q2 - Q3 interconnects – TAS B

  17. Q3 - DFBX

  18. DFBX - D1

  19. DFBX - D1

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