1. The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404. Report from ‘ECFA High Luminosity LHC Experiments Workshop’ and the ‘Review of the LHC and Injector complex Upgrade Plans’ [RLIUP]

2. Workshop Websites: ECFA High Luminosity LHC Experiments: ECFA High Luminosity LHC Experiments: 1.-3. October in Aix Les Bain 1.-3. October in Aix Les Bain Review of the LHC and Injector Upgrade Plans:Review of the LHC and Injector Upgrade Plans: 29.-31. October in Archamps together with the C- MAC 29.-31. October in Archamps together with the C- MAC 23 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN https://indico.cern.ch/conferenceDisplay.py?confId=260492 http://indico.cern.ch/conferenceOtherViews.py?view=standard&confId=252045

3. Motivation: Review the performance potential and expectations based on the operational experience with the LHC RunI. Review the performance potential and expectations based on the operational experience with the LHC RunI. Need for Coordinating the various upgrade plans (ATLAS, CMS, LHCb, ALICE, LHC machine and injector complex). Need for Coordinating the various upgrade plans (ATLAS, CMS, LHCb, ALICE, LHC machine and injector complex). Review the shutdown and operation plans before HL-LHC project start to maximize the LHC physics potential before HL-LHC (e.g. LINAC4 connection, ATLAS and CMS upgrade plans versus LHCb and ALICE and required LHC and injector consolidation prior to HL-LHC) Review the shutdown and operation plans before HL-LHC project start to maximize the LHC physics potential before HL-LHC (e.g. LINAC4 connection, ATLAS and CMS upgrade plans versus LHCb and ALICE and required LHC and injector consolidation prior to HL-LHC) 33 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

4. Discussion Topics: Performance summary of RunI Performance summary of RunI Questions, assumptions and comments for upgrade planning Questions, assumptions and comments for upgrade planning Current Baseline schedule Current Baseline schedule HL-LHC Performance Expectations HL-LHC Performance Expectations  Need to review future upgrade plans in view of RunI experience -how quickly can – will we reach hardware limits after LS1 [cryo limit of triplets, pile-up limit of detectors]) -how much integrated luminosity can one hope for in RunII Shutdown Requirements Shutdown Requirements  What is required for LS2? And prior to LS3?  When can we connect LINAC4?  Need to review running scenarios and configurations in view of LHC RunI experience Case studies for RLIUP workshop: Case studies for RLIUP workshop:  PIC (1ab -1 ), Upgrade Scenario 1 (2ab -1 ), Upgrade Scenario 2 (3ab -1 ) = Full HL-LHC 43 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

5. 2010: 0.04 fb -1  7 TeV CoM  Commissioning 2011: 6.1 fb -1  7 TeV CoM  Exploring the limits 2012: 23.3 fb -1  8 TeV CoM  Production Performance Summary of RunI: 53 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN 2012 Performance: 77% of design luminosity - @ 4/7 design energy - >> nominal bunch intensity - ~70% nominal emittance -    = 0.6 m (design 0.55 m) @ 4 TeV - 50ns  half nominal number of bunches and twice the nominal pile-up!

6. The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404. Huge efforts over last months to prepare for high lumi and pile-up expected in 2012:  optimized trigger and offline algorithms (tracking, calo noise treatment, physics objects)  mitigate impact of pile-up on CPU, rates, efficiency, identification, resolution  in spite of x2 larger CPU/event and event size  we do not request additional computing resources (optimized computing model, increased fraction of fast simulation, etc.) Z  μμ Z  μμ event from 2012 data with 25 reconstructed vertices 2012: ~30 events/xing at beginning of fill with tails up to ~ 40. 2011: average 12 events/xing, with tails up to ~20

7. Performance Summary of RunI: h = 9 h = 21 h = 9  10  11  12  13  14  7  21 h = 21  42  84 +4 bunches 4 bunches Nominal: Double batch injection (4+2 bunches) into PS → triple and two double splitting of 4 + 2 bunches  6 * 12 = 72 bunches per PS cycle. Batch Compression Merging Splitting Scheme: Double batch injection (4+4 bunches) into PS → bunch merging; triple and two double splittings  4 * 12 = 48 bunches per PS cycle. Bunch spacing [ns] Protons per bunch [ppb] Norm. emittance H&V [  m] Exit SPS 25 (design report)1.15 x 10 11 3.75 251.2 x 10 11 2.7 501.7 x 10 11 1.8 Huge performance potential for high brightness beams generation in the injector complex!!! 50ns operation in RunI has shown that these high brightness beams can be brought into collision in the LHC! Huge performance potential for high brightness beams generation in the injector complex!!! 50ns operation in RunI has shown that these high brightness beams can be brought into collision in the LHC! 73 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

8. Assumptions for HL-LHC Collision Parameters: 5% intensity loss assumed during the cycle from SPS extraction to LHC collisions 5% intensity loss assumed during the cycle from SPS extraction to LHC collisions  Average lifetime along the cycle before collision of ~22 hours  But minimum lifetime > 0.2 hours (assuming tight collimator settings) limited by power deposited on the collimators Emittance blow-up of 20% from SPS extraction to LHC collision when compatible with inevitable sources of blow-up  IBS Emittance blow-up of 20% from SPS extraction to LHC collision when compatible with inevitable sources of blow-up  IBS Margin of ~10-15 % on the average emittance blow-up on top of IBS Margin of ~10-15 % on the average emittance blow-up on top of IBS IBS calculations including injection/ramp and squeeze assuming controlled- longitudinal blow-up to keep bunch length at 10 cm up to flat-top IBS calculations including injection/ramp and squeeze assuming controlled- longitudinal blow-up to keep bunch length at 10 cm up to flat-top SPS Extraction LHC collision (min. value – IBS) LHC collision Bunch population [10 11 ]  n (H/V) [  m]  n (H/V) [  m] Bunch population [10 11 ]  n coll (H/V) [  m] Blow-up [%] BCMS1.451.45/1.451.74/1.451.381.85/1.8527 Standard1.451.85/1.852.09/1.851.382.25/2.2521 [G. Arduini comparing performance with PIC & LLRF SPS upgrade @ RLIUP workshop] 83 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

9. General Considerations & Questions: LHC machine: LHC machine: How long can the machine run without TS? (Cryogenics, maintenance…) How long can the machine run without TS? (Cryogenics, maintenance…) Review of Performance potential based on RunI experience Review of Performance potential based on RunI experience Injectors: Injectors: Linac4 connection, timing and staging of LIU upgrades Linac4 connection, timing and staging of LIU upgrades Risks of running with Linac2 until 2018/2019 Risks of running with Linac2 until 2018/2019 Experiments: Experiments: Coordinating and planning for ALL Upgrades: LS2 & LS3, EYETS? Coordinating and planning for ALL Upgrades: LS2 & LS3, EYETS? Detector performance: Detector performance:  Pileup and pileup density limitations [140 and 0.6/mm to 1.3/mm for HL-LHC]  Luminosity leveling between all experiments (5 orders of magnitude) Longer-term strategy: Longer-term strategy: Accelerator technology development time Accelerator technology development time Detector technology development time, funding profiles for the upgrades… Detector technology development time, funding profiles for the upgrades… Radiation issues and personnel protection during installation work Radiation issues and personnel protection during installation work 93 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

10. Extended Year End Technical Stop (EYETS): CMS: CMS: 4 layer pixel ready to install at end of 2016 [all preparations, including new beam pipe and cooling system installed in LS1.] 4 layer pixel ready to install at end of 2016 [all preparations, including new beam pipe and cooling system installed in LS1.] 4.5 months beam to beam (plus some contingency) 4.5 months beam to beam (plus some contingency) Other experiments Other experiments ATLAS don’t need it ATLAS don’t need it Not of any significant benefit to ALICE and LHCb but… Not of any significant benefit to ALICE and LHCb but… Cryogenics Cryogenics magnets would be kept cold below 80K during this "physics break” magnets would be kept cold below 80K during this "physics break” could imagine some training quenches in order to push towards 7 TeV. could imagine some training quenches in order to push towards 7 TeV. some opportunity for selective maintenance some opportunity for selective maintenance LIU preparation LIU preparation Could use time in Booster/PS – e.g. cable cleanup Could use time in Booster/PS – e.g. cable cleanup 103 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN [Mike Lamont @ RLIUP]

11. Baseline Schedule: Standard Operation Year PhaseDays Christmas technical stop including HWC – beam to beam91 (13 weeks) Commissioning with beam (double coming out of a LS)21 Machine development22 Scrubbing7 (to 14) Technical stops15 (3 x 1 week) Technical stop recovery6 Proton physics including intensity ramp-up160 Ion run set-up4 Ion physics run24 Contingency7 (or 0) Total365 113 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN [Mike Lamont @ RLIUP]

12. The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404. Baseline schedule and Performance: 123 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN Splice Consolidation & Energy Increase LIU (PSB, L4 and SPS), collimation and Experiment upgrades HL-LHC Installation

13. Reference Schedule after LS3: 133 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN [Malika Meddahi @ Preparation of RLIUP]

14. Main points from ECFA workshop: Request for a minimum goal of 3000 fb -1 Request for a minimum goal of 3000 fb -1 The HL-LHC is a Higgs factory (measure self-coupling at the 10% level) The HL-LHC is a Higgs factory (measure self-coupling at the 10% level) Major upgrades for LHCb and ALICE planed in LS2 Major upgrades for LHCb and ALICE planed in LS2 New concept of Pileup density limit and luminous region control for the General Purpose experiments!  HL-LHC performance limit!?! New concept of Pileup density limit and luminous region control for the General Purpose experiments!  HL-LHC performance limit!?! Interest - no complaint - if LS2 gets delayed by one year Interest - no complaint - if LS2 gets delayed by one year TAS and TAN upgrades required for HL-LHC  interplay with experimental beam pipes TAS and TAN upgrades required for HL-LHC  interplay with experimental beam pipes LS2 should last 18 month LS2 should last 18 month LS3 should last 2-3 years LS3 should last 2-3 years Ion operation is a vital part of the HL-LHC program Ion operation is a vital part of the HL-LHC program Wishes for special operation modes before HL-LHC: Wishes for special operation modes before HL-LHC:  e.g. Proton-Proton operation at lower center-of-mass energy 143 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

15. LS2 Requests from Experiments: ALICE ALICE Major upgrade of ALICE detector, for installation in 2018/19 Major upgrade of ALICE detector, for installation in 2018/19 “we assume LS2 is 18 months” “we assume LS2 is 18 months” “would not violently object if LS2 shifts to 2019” – would provide important contingency “would not violently object if LS2 shifts to 2019” – would provide important contingency LHCb LHCb Requires 18 months Requires 18 months A later start of LS2 at end 2018 would be advantageous for LHCb A later start of LS2 at end 2018 would be advantageous for LHCb Further delay of the start of LS2 beyond 2018 would be disfavoured Further delay of the start of LS2 beyond 2018 would be disfavoured ATLAS ATLAS Assumes baseline (LS2 14 months and starting in 2018) Assumes baseline (LS2 14 months and starting in 2018) CMS CMS LS2: Assumes 14 to 18 months LS2: Assumes 14 to 18 months Prefers LS2 starting end 2018  preparatory work for LS3 (e.g. TAS) [Worry about radiation levels forcing potential constraints/cool-down time etc. ] & Prefers LS2 starting end 2018  preparatory work for LS3 (e.g. TAS) [Worry about radiation levels forcing potential constraints/cool-down time etc. ] & “to collect sufficient data… LS2 must not start before summer 2018” “to collect sufficient data… LS2 must not start before summer 2018” [Mike Lamont @ RLIUP] 153 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

16. Case Studies for RLIUP: Performance Improving Consolidation (PIC) only Performance Improving Consolidation (PIC) only  can one reach 1000fb -1 with 10 years of operation? Upgrade Scenario 1 (PIC plus selected upgrade options) Upgrade Scenario 1 (PIC plus selected upgrade options)  can one reach 2000fb -1 with 10 years of operation? Upgrade Scenario 2 (PIC plus all upgrade options) Upgrade Scenario 2 (PIC plus all upgrade options)  can one reach more than 3000fb -1 with 10 years of operation? 163 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

17. Main points from RLIUP: Very high brightness performance in LHC limited by IBS. Very high brightness performance in LHC limited by IBS. Experiments are NOT interested in an extended EYEST [> 9 month] with LINAC4 connection between LS1 and LS2. Experiments are NOT interested in an extended EYEST [> 9 month] with LINAC4 connection between LS1 and LS2. Concept of Pileup density limitation and luminous region control is a key ingredient defining the running scenarios and optimum upgrade options for the General Purpose experiments in HL-LHC. Concept of Pileup density limitation and luminous region control is a key ingredient defining the running scenarios and optimum upgrade options for the General Purpose experiments in HL-LHC. Experiments would not complain if LS2 delays by 1 year Experiments would not complain if LS2 delays by 1 year LS2 should last 18 month LS2 should last 18 month LS3 should last 2-3 years LS3 should last 2-3 years 173 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

18. Main points from RLIUP: US1 (2000fb -1 ) can be reached with full LIU upgrade + PIC (new triplet and collimation upgrade) in the LHC! US1 (2000fb -1 ) can be reached with full LIU upgrade + PIC (new triplet and collimation upgrade) in the LHC! Upgrade costs are small compared to LHC operation cost  upgrade for maximum performance as fast as possible! Upgrade costs are small compared to LHC operation cost  upgrade for maximum performance as fast as possible! US2 goal is challenging with pile-up density limit! US2 goal is challenging with pile-up density limit! Machine reliability is critical for success of HL-LHC! Machine reliability is critical for success of HL-LHC! Remote handling requirements for TS after LS3! Remote handling requirements for TS after LS3! New RF options: 200 MHz, 800MHz (for IBS, Crab Kissing scheme, e-cloud, and luminous region control) New RF options: 200 MHz, 800MHz (for IBS, Crab Kissing scheme, e-cloud, and luminous region control) New e-cloud backup scheme: 8b4e with 25ns New e-cloud backup scheme: 8b4e with 25ns 183 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

19. Challenge of Reaching US2 Goals: [RLIUP Session 2 Summary by Gianluigi Arduini]  An exponential fill length distribution is used for the performance figures quoted in the next slides. 20112012  Fill lengths in 2011 and 2012  exponentials. o ~30% of the fills are dumped by OP. J. Wenninger 193 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

20. HL experiments accept 140 events/crossing, with 1.3 mm -1 density HL experiments accept 140 events/crossing, with 1.3 mm -1 density (performance limit with impact on efficiency) Long fills (>6 h) and high Long fills (>6 h) and high pile-up (>140) are key ingredients for US2 integrated luminosity target. Main challenges besides e-cloud: effective leveling method and good reliability. Main challenges besides e-cloud: effective leveling method and good reliability. [R. De Maria] US2 Challenge of Reaching US2 Goals: 203 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

21. LS2 Requests from Injectors: Approx. months Linac4Linac4 connection to the PSB takes place during LS2 PSBTotal of 16 months for PSB works including 1.5 months of cool-down and 4 months of beam commissioning Cabling activity in the PSB defines the critical path! 17.5 PSPS upgrade is determined mainly by magnet program (replacement of the PFWs) – about 1 year – plus 1 month cool-down 17.5 + 1 SPS12 months for the 200 MHz upgrade 12 months for aC coating of main bending magnets (tbc) Injection upgrade 18.5 + 2 Full Injector Upgrade 20.5 to pilot Some co-commissioning injectors/LHC might be necessary 213 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

22. Experiments Perspective for Ions: Pb-Pb Performance wishes: Pb-Pb Performance wishes: 3nbarn -1 by LS3 in ATLAS. All experiments like to collect at least 1nbarn -1 during RunII. 3nbarn -1 by LS3 in ATLAS. All experiments like to collect at least 1nbarn -1 during RunII. 10nbarn -1 for ALICE after upgrade during LS2. 10nbarn -1 for ALICE after upgrade during LS2. LHCb: p-Pb NOT at the end of ion program of RunII  compatibility with ALICE plan? LHCb: p-Pb NOT at the end of ion program of RunII  compatibility with ALICE plan? ALICE requires leveling during Pb-Pb and p-Pb (while ATLAS and CMS do not) ALICE requires leveling during Pb-Pb and p-Pb (while ATLAS and CMS do not)  Physics and Machine coordination!!!  Physics and Machine coordination!!! The Pb-Pb runs in 2015 and 2016 can NOT be grouped (trigger configurations)  No to an extended ion run as part of LS1.5 and the LINAC4 connection! The Pb-Pb runs in 2015 and 2016 can NOT be grouped (trigger configurations)  No to an extended ion run as part of LS1.5 and the LINAC4 connection! LHCb would like 10 times more integrated luminosity with p-Pb as compared to Run1. LHCb would like 10 times more integrated luminosity with p-Pb as compared to Run1. ALICE polarity reversals on regular basis. ALICE polarity reversals on regular basis. Performance wishes after LS2: Performance wishes after LS2: Different beam species: Pb-Pb, p-Pb, Ar-Ar, p-Ar Different beam species: Pb-Pb, p-Pb, Ar-Ar, p-Ar 10 fold increase in beam performance expected from ALICE  collimation upgrade and vacuum conditions? Requires SPS and LINAC3 upgrades and increase in LEIR intensity! 10 fold increase in beam performance expected from ALICE  collimation upgrade and vacuum conditions? Requires SPS and LINAC3 upgrades and increase in LEIR intensity! 223 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

23. Ion beam Performance and machine upgrade plans: Performance summary of RunI: Performance summary of RunI: 2 bunches, 200ns spacing in PS  24 bunches in SPS  360 bunches in LHC 2 bunches, 200ns spacing in PS  24 bunches in SPS  360 bunches in LHC Upgrade Plans: Upgrade Plans: Increasing the bunch intensity is not a viable option (IBS and luminosity burn off) Increasing the bunch intensity is not a viable option (IBS and luminosity burn off) 100ns batch compression in the SPS (already envisaged for RunII in the PS but without the SPS injection upgrade  432 bunches for RunII). 100ns batch compression in the SPS (already envisaged for RunII in the PS but without the SPS injection upgrade  432 bunches for RunII). Increasing the number of injections would increase the injection time and thus the emittance growth  keep the number of PS injections into the SPS at 12  requires SPS injection system upgrade (recuperated equipment from PSB energy upgrade, not requiring new kicker magnets)  624 bunches in the LHC @ collision Increasing the number of injections would increase the injection time and thus the emittance growth  keep the number of PS injections into the SPS at 12  requires SPS injection system upgrade (recuperated equipment from PSB energy upgrade, not requiring new kicker magnets)  624 bunches in the LHC @ collision Requires higher bunch intensities in LEIR (already above design and currently limited)  further studies required Requires higher bunch intensities in LEIR (already above design and currently limited)  further studies required Slip stacking in the SPS to be re-evaluated  smaller bunch spacing (e.g. 50ns?) Slip stacking in the SPS to be re-evaluated  smaller bunch spacing (e.g. 50ns?) LINAC3 pulsing @ 10Hz (source already pulsing @ 10Hz) LINAC3 pulsing @ 10Hz (source already pulsing @ 10Hz) Wish for a dedicated source test stand for future source developments Wish for a dedicated source test stand for future source developments 233 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

24. Main points from RLIUP: Recommendation for full LIU upgrade including PSB 2 GeV Energy upgrade  required for margins and confidence to produce US1 and US2 parameters! Recommendation for full LIU upgrade including PSB 2 GeV Energy upgrade  required for margins and confidence to produce US1 and US2 parameters! With all upgrade ingredients endorsed, one needs a resource loaded schedule to identify what upgrades can actually be implemented during which shutdown With all upgrade ingredients endorsed, one needs a resource loaded schedule to identify what upgrades can actually be implemented during which shutdown Recommendation for full HL-LHC upgrade with development of novel schemes that can alleviate limitations (pile-up density and e-cloud) and-or improve performance: New SC RF (200MHz, 800MHz, Crab Cavities); LRBB wire; Stochastic Cooling Recommendation for full HL-LHC upgrade with development of novel schemes that can alleviate limitations (pile-up density and e-cloud) and-or improve performance: New SC RF (200MHz, 800MHz, Crab Cavities); LRBB wire; Stochastic Cooling Recommendation to evaluate means for maximizing the machine availability during HL-LHC Recommendation to evaluate means for maximizing the machine availability during HL-LHC 243 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

25. 25 HL-LHC goal could be reached by end 2035 L. Rossi @Kick-off Meeting 11 Nov 2013 M. Lamont, 7th HL-LHC Coordination Group, Jul.2013

26. Slipped baseline+12 Schedule: Mike Lamont @ RLIUP 263 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN  HL start in 2025; HL goal could be reached by end 2037

28. Backup Transparencies: -e-cloud and 8b4e backup -e-cloud and 8b4e backup -scrubbing fills -scrubbing fills 283 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

29. Operation Cycle: LHC Operation Cycle @ 7Tev: Matteo Solfaroli@ Evian 2012 70min 50min 31min 26min Squeeze Total Minimum Turnaround Time: 176min or 3 hours Turnaround Time

30. HL-LHC Performance Estimates Parameternominal 25ns50ns N1.15E+112.2E+113.5E+11 nbnb 2808 1404 beam current [A]0.581.120.89 x-ing angle [  rad] 300590 beam separation [  ] 1012.511.4  * [m] 0.550.15  n [  m] 3.752.53.0  L [eVs] 2.512.5 energy spread1.20E-04 bunch length [m]7.50E-02 IBS horizontal [h]80 -> 10620.020.7 IBS longitudinal [h]61 -> 6015.813.2 Piwinski parameter0.683.12.9 geom. reduction0.830.310.33 beam-beam / IP3.10E-033.9E-035.0E-03 Peak Luminosity1 10 34 7.4 10 34 8.5 10 34 Virtual Luminosity1.2 10 34 21 10 34 26 10 34 (Leveled to 5 10 34 cm -2 s -1 and 2.5 10 34 cm -2 s -1 ) ‘Stretched’ Baseline Parameters following 2 nd HL-LHC-LIU: 6.2 10 14 and 4.9 10 14 p/beam  sufficient room for leveling (with Crab Cavities) Virtual luminosity (25ns) of L = 7.4 / 0.35 10 34 cm -2 s -1 = 21 10 34 cm -2 s -1 (‘k’ = 5) Virtual luminosity (50ns) of L = 8.5 / 0.33 10 34 cm -2 s -1 = 26 10 34 cm -2 s -1 (‘k’ = 10) 303 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

31. Max. luminosity in one fill237 pb -1 Max. luminosity delivered in 7 days1350 pb -1 Longest time in stable beams (2012)22.8 hours Longest time in stable beams for 7 days91.8 hours (55%) 77% of design luminosity: - @ 4/7 design energy - >> nominal bunch intensity - ~70% nominal emittance -    = 0.6 m (design 0.55 m) @ 4 TeV - 50ns  half nominal number of bunches and twice the nominal pile-up! Impressive performance after only 3 years of operation and at E = 4 TeV! Peak Performance Summary: 313 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

32. 32 E-cloud G. Rumolo, G. Iadarola Arc dipole, 2808b, 1 beamArc quadrupole, 2808b, 1 beam SEY=1.4 SEY=1.3 US1, US2 PIC E-cloud solution currently betting on: Scrubbing for dipoles for suppression of electron cloud Expected to be difficult to eliminate the electron cloud in the quadrupole Effects on on beam only at injection (optimize injection duration) 29-31. October; Review of the LHC and Injector Upgrade Plans; Archamps

33. The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404. Available cooling * [W] Max Meas 3429 [W] Scaling factor (N bun = 2700) Scaling factor (E=7 TeV + nominal filling) US1, US2 [W] (SEY like 2012) US1, US2 [W] (dipoles fully scrubbed) Arc half-cell25545x3.4 0.81x3.5(0.0) + 0.19x0.15 438 (x 1.72) 4.4 (x 0.02) SAM 11612x3.4x0.15 6.12 (x 0.38) 6.12 (x 0.38) SAM 22417x3.4x0.15 8.67 (x 0.36) 8.67 (x 0.36) D3IP4244x3.4x3.5(0.0) 47.6 (x 1.98) – Semi-SAM4018x3.4 0.3x3.5(0.0) + 0.7x0.15 70.69 (x 1.77) 6.43 (x 0.16) * From L. Tavian, Evian Workshop 2012 If dipoles not fully scrubbed (but maybe just enough to cope with heat load), the higher intensity bunches of US1 and US2 could still suffer more from the interaction with the electron cloud 33 29-31. October; Review of the LHC and Injector Upgrade Plans; Archamps G. Rumolo

34. 343 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

35. 353 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN

36. Baseline Schedule until LS3: LS1 RUN 2 RUN 3 LS2 LS3 363 rd Joint HiLumi LHC-LARP Annual Meeting, Daresbury 11-15 November 2013 Oliver Brüning CERN [Mike Lamont @ RLIUP] Reference Schedule before LS3: