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Chamonix Summary of Session 6 on the HL-LHC upgrade

Chamonix Summary of Session 6 on the HL-LHC upgrade. Organized by O . Brüning and Paolo Ferracin together with all the speakers. Summary of Session 6 on the HL-LHC. Session Overview:.

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Chamonix Summary of Session 6 on the HL-LHC upgrade

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  1. Chamonix Summary of Session 6 on the HL-LHC upgrade Organized by O. Brüningand Paolo Ferracin together with all the speakers Summary of Session 6 on the HL-LHC

  2. Session Overview: • The Session featured 6 presentations with 20min presentation and 10 min of discussion for each presentation: • HL-LHC Parameter and Lay-out Baseline  Paolo Fessia • HL-LHC Magnet Roadmap  EzioTodesco • HL-LHC RF Roadmap  Rama Calaga • HL-LHC alternative scenarios, parameters and lay-out  Rogelio Tomas • Collimation and MP Roadmap  Stefano Redaelli • Down Selection Criteria and MDs Prior to LS3  GianluigiArduini Summary of Session 6 on the HL-LHC

  3. Cryoplant IP 1,5 P I C BIS CB Magnet system MQXFA MQXFB, MBXF, MBRD, MQYY, Q5 1.9, Q6 1.9 MCBXFB, MCBXFA, MQSXF, MCTXF, MCTSXF, MCDXF, MCDSXF, MCOXF, MCOSXF, MCSXF,MCSSXF, MCBRD, MCBYY Warm compressor and other surface eq. Cryo line Alignment IP 1,5 DS Collimation pp (TBC RUN II) QPS2 Interaction Region and MS DS Collimation pp (TBC RUN II) DS Collimation for ion IP 1,5 IP 2 IP 7 SC link/powering IP 7 IP 1,5 SC link/ Powering arc EE TAXS, TAXN DF(X-M) + SC Link DSH (X-M) DFH(X-M) + Power converters Collimation(TCTPM, TCL, TCLM, TCTP) Rad-hard electronics for BLM and BPM Beam vacuum RF system Loads, circulators, RF power, LLRF, HVPS, central LLRR Beam diagnostic BPMSQW, BMPSQ, BPMSQT, BMLC Crab Cavity cryomodules CC diagnostic and protection Cryo-bypass+TCLD Cryo-bypass+TCLD Cryo-bypass+TCLD H.F. dipoles H.F. dipoles DFHA + Power converters H.F. dipoles DFA+ SC Link DSHA Talk 1: Paolo Fessia Hor. SC L. DSH + DFA Power converters New DSLM for Q6 Summary of Session 6 on the HL-LHC

  4. CS Baseline collection completedeach system/equipment with Conceptual Spec, presently 90 document recorded Talk 1: Paolo Fessia Summary of Session 6 on the HL-LHC Courtesy of I. Bejar Alonso, S. Chemli

  5. LAY OUT • Last bits being frozen (correctors for D2 Q4) 2008 2022 Talk 2: EzioTodesco Summary of Session 6 on the HL-LHC

  6. CONTENTS: HL-LHC IR MAGNETS Separationdipole D1 (KEK) Triplet QXF (LARP and CERN) Skew corrector (INFN) Orbit corrector (CIEMAT) Talk 2: EzioTodesco Corrector sextupole (INFN) Corrector octupole (INFN) Recombinationdipole D2 (INFN design) Q4 (CEA) Corrector dodecapole (INFN) Cross-sections in scale Corrector decapole (INFN) Summary of Session 6 on the HL-LHC

  7. 11 TESLA: IDEA Talk 2: EzioTodesco • Idea: replace a 8.3 T Nb-Ti dipole with 11 T Nb3Sn dipole • This leaves enough space for a 0.8 m long room temperature collimator • One dipolereplaced by two 5.5-m-long dipoles plus r.t. collimator • 4 unitsneeded for IP2 in LS2 – first Nb3Sn seeing a beam! • 8 unitsneeded for IP7 in LS3 • Up to 16 more unitscouldbeneeded at IP5 and IP1 in LS3 [Baseline program of WP5 for Col Upgrade] Summary of Session 6 on the HL-LHC

  8. [Studies for ‘Option 0’ of Crab Kissing scheme ongoing] • Required for longit. • bunch shaping Talk 3: Rama Calaga Summary of Session 6 on the HL-LHC

  9. Talk 4: Rogelio Tomas Summary of Session 6 on the HL-LHC

  10. Talk 4: Rogelio Tomas Summary of Session 6 on the HL-LHC

  11. MoGraphite DS Collimators E-lens & altern Talk 5: Stefano Redaelli Summary of Session 6 on the HL-LHC

  12. Talk 5: Stefano Redaelli Summary of Session 6 on the HL-LHC

  13. Nominal Scenario: Areas for MD studies during RunII • Collide & Squeeze • Dynamic Aperture • Flat Optics Talk 6: GianluigiArduini • Some of the challenges: • Low b* optics with well behaved chromatic properties • Electron cloud effects with 25 ns beams • Large crossing angle and Crab Crossing to minimize the geometric reduction factor and pile-up density (SPS tests) • b* levelling • Large beam-beam tune spreads • Beam Halo Measurement and Control particularly to cope with possible crab cavities failure scenarios. • Stability and Minimization of impedance Summary of Session 6 on the HL-LHC

  14. Main Points from the Q&A sessions: It is important to quantify the required availability and efficiency for reaching HL-LHC performance and to check these for all LHC systems (high reliability machine!) Stochastic Cooling (for Ion operation) is not in the HL-LHC Baseline Need for prioritization of MS upgrades not yet in the baseline (e.g. new Q5 in IR1 & 5) and identification of resulting performance limitations. Need for clarification of ‘ultimate’ HL-LHC performance. Issue of small series production and risk mitigation (multiple producers). Need for clarification of spare RF components for new HL-LHC equipment. Interplay of 200MHz LH RF system and 400MHz Crab-Cavities (non-linearity). Are there plans for testing Crab Cavities in the LHC after the SPS tests and before HL-LHC?  Have been looked at at IP4 but would have impact on schedule! Preferred luminosity levelling method  dynamic low-beta and NOT Crab cavities Summary of Session 6 on the HL-LHC

  15. Summary of Session 6 on the HL-LHC

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