1. LHC CMS Detector Upgrade Project P05 – Trigger Upgrade: 401.4 Wesley Smith, U. Wisconsin L2 Manager, WBS 401.4 August 26, 2013 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 1

2. LHC CMS Detector Upgrade Project 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 2 L1 Trigger Upgrades & Inputs Electromagnetic Calorimeter ECAL Electromagnetic Calorimeter ECAL Hadron Calorimeter HCAL Hadron Calorimeter HCAL Endcap Muon Detectors CSC, RPC Endcap Muon Detectors CSC, RPC Not shown (off-detector) Muon Trigger Calorimeter Trigger Not shown (off-detector) Muon Trigger Calorimeter Trigger 401.04

3. LHC CMS Detector Upgrade Project  Conceptual Design  Trigger Overview  Muon Trigger  Calorimeter Trigger  Project Organization and Management  ESH&Q  Scope  Schedule  Risk  Cost  Summary 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 3 Outline

4. LHC CMS Detector Upgrade Project Conceptual Design 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 4

5. LHC CMS Detector Upgrade Project  LHC beams cross every 25 ns with ~ 23 interactions → 0.5 MB of data, but can only store ~ 1 kHz of 0.5 MB data → Trigger  Trigger rates are driven by the increase in luminosity, the center- of-mass energy, and by higher Pile-Up (PU)  Detector readout systems limit Level-1 trigger output rate to 100 kHz, latency to 4 μsec.  Mitigate by improving e/γ isolation, τ id, μ p T resolution, μ isolation, jets with PU subtraction and L1 menu sophistication  Increase system flexibility with high bandwidth optical links and large FPGAs, and standardize on μTCA telecom standard  Build and commission upgrade in parallel with current trigger system to safeguard physics, decouple from LHC schedule  Overall design:  Two-layer calorimeter trigger with tower-level precision and PU subtraction  Integrated muon trigger combining all CSC, DT and RPCs in track-finding CD-1 Review -- P05: Trigger Upgrade 5 L1 Trigger Upgrade – overview 26 August 2013, Wesley Smith

6. LHC CMS Detector Upgrade Project  Physics priorities:  Measure all Higgs BR precisely to confirm Standard Model or not ⇒ retain or improve current trigger capability critical  Want to be able to answer question of naturalness - whether or not there is new physics stabilizing Higgs mass o SUSY remains a leading candidate, but if so, must have light stops o Also must be able to trigger on and search for all variants (e.g. RPV with all hadronic final states) to draw a firm conclusion  Studied a set of benchmark physics channels  Looked at performance of these channels in 2012 analyses with and without L1 trigger upgrade at different luminosities o Based on a simplified trigger menu with a total rate < 100 kHz  Results for luminosities up to 2.2 x 10 34 cm –2 s –1  Acceptance Improvements > x 2 in some channels for same rate  Average Improvement 40%  Results summarized in breakout sessions 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 6 Upgrade Trigger Physics Performance

7. LHC CMS Detector Upgrade Project Final Overall Upgrade Scheme CD-1 Review -- P05: Trigger Upgrade 726 August 2013, Wesley Smith LHC CMS Detector Upgrade Project ↑HCAL Upgrade↑ Trigger Upgrade ↓Trigger Upgrade↓ (Object Finding) (Cluster Finding)

8. LHC CMS Detector Upgrade Project Muon Trigger Transition 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 8  Install fully parallel and higher bandwidth optical path for CSC  New CSC Muon Port Cards mezzanine cards installed in cavern during LS1 o Operations Program  Alleviates bottleneck and send all segments from each CSC (robustness to PU and collimated signals)  Build up new Track Finder in 2015 and commission in parallel, ready by 2016 Old systemNew system

9. LHC CMS Detector Upgrade Project 401.04.03 EMU Trigger Upgrade CavernCounting Room μTCA: Advanced Mezzanine Cards from Telecommunications Computing Architecture (commercial telecommunications hardware) CD-1 Review -- P05: Trigger Upgrade 926 August 2013, Wesley Smith 401.04.03.03 MPC-EMUTF Optical Fibers* (Rice) 401.04.03.02 Muon Port Card Mezzanine* (Rice) 401.04.03.04 Endcap Muon Track-Finder (U. Florida) 401.04.03.05 EMUTF Infrastructure (U. Florida) 401.04.03.06: Muon Sorter (Rice) Trigger MotherBoard Data MotherBoard Clock&Control Sector Processors Clock & Control Muon Sorter *M&S on FY13 Ops. Prog. VME

10. LHC CMS Detector Upgrade Project 401.04.03.04: EMU Track-Finder (U. Florida) 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 10  Muon Track Finder processor: MTF7  13 needed + 4 spares + 3 test setups = 20  Optimized for maximum input from muon detectors (84 input links, 24 output links)  Dual card with large capacity for RAM (~1GB) to be used for p T assignment in track finding  Current prototype based on Virtex 6 FPGA is undergoing final tests  Virtex 7 FPGA design is ~75% done, expected late 2013 Back: Core FPGA card with P T LUT mezzanine Front: Optics card

11. LHC CMS Detector Upgrade Project Calo. Trigger Upgrade in Parallel: Split inputs from ECAL and HCAL HCAL Energy (HTR) ECAL Energy (TCC) Regional Calo Trigger Global Calo Trigger EM candidates Region energies HF Energy (μHTR) HCAL Energy (μHTR) Layer 1 Calo Trigger Layer 2 Calo Trigger Current L1 Trigger System Upgrade L1 Trigger System oSLB oRM  ECAL: optical Serial Link Board (OSLB) and optical Receiver Mezzanines (oRM) connect to Present and Upgrade Calorimeter Trigger  HCAL: optical splitters drive both HTRs and μHTRs 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 11 US UK US UK HCAL Optical Splitters Stage HCAL uHTR & assoc. Cal. Trigger Cards (Cluster Finding) (Object Finding)

12. LHC CMS Detector Upgrade Project Upgrade Calorimeter Trigger Layer 1 and 2 Hardware US: UK: 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 12 Vienna: (Cluster Finding) (Object Finding)

13. LHC CMS Detector Upgrade Project 401.04.04.02: Cal. Trig. Processor Virtex-6 Proto. Board – U. Wisconsin Back End FPGA XC6VHX250T/ XC6VHX380T Front End FPGA XC6VHX250T/ XC6VHX380T Avago AFBR- 810B Tx Module 4X Avago AFBR-820B Rx Module MMC Circuitry JTAG/USB Console Interface Mezzanine Power Modules Dual SDRAM for dedicated DAQ and TCP/IP buffering 12x Multi Gig Backplane Connections 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 13 36 total + 8 spares + 2 test setups = 46 CTP6 48 optical inputs 12 optical outputs @4.8-6.4 Gbps

14. LHC CMS Detector Upgrade Project  Upgrade is based upon common μTCA hardware platform and components (Virtex-7 FPGA, multi-gigabit optical links) also used by other CMS systems  Many handles to facilitate testing – test-pattern injection, spy-buffer readout as well as test stands  Same team built existing trigger system and wrote its software & firmware → scope, requirements, interfaces well understood  Requirements are frozen in approved Trigger TDR  System is commissioned and operated in parallel with existing trigger  Working prototypes for all major cards exist & have passed tests  Production quotes exist for all critical parts with confirmed delivery times 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 14 Technical Feasibility

15. LHC CMS Detector Upgrade Project  Standardize within US CMS Trigger Project  Use of a single FPGA type: Xilinx XC7VX690T o Also used across CMS upgrade and other CERN projects  Negotiated US price at 50% of retail through CERN and US distributor (Avnet)  Standardize across US CMS Upgrade Project  Use of a common crate/backplane infrastructure o Use same μTCA architecture as is being used by other CMS subsystems such as HCAL. o Built to similar specifications by common vendors. o Opportunities for pooling spares and cooperation on engineering. o This allows use of common components such as:  Use of standard DAQ/Trigger/Clock Interface: BU AMC13 o Common connection to CMS data acquisition, trigger timing and control systems. o Developed for HCAL project by Boston University 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 15 Value Engineering

16. LHC CMS Detector Upgrade Project Project Organization 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 16

17. LHC CMS Detector Upgrade Project 26 August 2013, Wesley Smith17 401.04 Trigger Organization Chart Muon Port Card & Sorter: L4 Manager: Paul Padley CERN Integration: L4 Manager: Pam Klabbers Muon Track-Finder: L4 Manager: Ivan Furic CD-1 Review -- P05: Trigger Upgrade

18. LHC CMS Detector Upgrade Project  W.S. (U. Wisconsin)  CMS Trigger Project Manager 1994-2007,  Trigger Coordinator 2007 – 2012  US CMS L2 Trigger Project Manager 1998 – present  Darin Acosta (U. Florida)  CMS Trigger Project Manager 2012-13  EMU Track-Finder, US CMS Trigger, 1998- present  Sridhara Dasu (U. Wisconsin)  US CMS L3 Manager for Calorimeter Trigger, 1998 – present  Author of original and upgrade cal. trig. Algorithms 1994 – present  Pam Klabbers (U. Wisconsin)  CMS Regional Calorimeter Trigger Operations Manager (more than a decade on RCT project)  CMS Deputy Trigger Technical Coordinator  Ivan Furic (U. Florida)  CMS CSC muon trigger maintenance and operations 2010-11  CMS CSCTF Upgrade leader  Paul Padley (Rice U.)  US CMS EMU Project Manager 2006-2012  EMU Port Card, Clock Card, Sorter, 1998 – present 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 18 Trigger Mgm’t CMS Experience Over 75 years of combined CMS Trigger Management Experience!

19. LHC CMS Detector Upgrade Project  Tom Gorski (U. Wisconsin) – Calorimeter Trigger  Over a decade of engineering on the CMS Calorimeter Trigger  Alex Madorsky (U. Florida) – Muon Track-Finder  Over a decade of engineering on CMS Trigger, EMU, CSCTF  Mike Matveev (Rice U.) – Muon Port Cards and Sorter  Over a decade of engineering on CMS Trigger, EMU, Port Cards, Sorter  Mathias Blake (U. Wisconsin) – Cal. Trig. Firmware  New to project  5 years Applications Engineer at Xilinx, 2 years FPGA Engineer at DRS Technologies, 3 years FPGA Design Engineer at Dolby Labs 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 19 CMS Trig. Engineering Exp. Over 40 years of engineering experience, 30 on CMS Trigger

20. LHC CMS Detector Upgrade Project ESH&Q 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 20

21. LHC CMS Detector Upgrade Project  Safety: follows procedures in CMS-doc-11587, FESHM  L2 Manager (W.S.) responsible for applying ISM to trigger upgrade. o Under direction of US CMS Project Management.  Modules similar to others built before, of small size and no high voltage  Quality Assurance: follows procedures in CMS-doc-11584  Regularly evaluate achievement relative to performance requirements and appropriately validate or update performance requirements and expectations to ensure quality.  QA: Equipment inspections and verifications; Software code inspections, verifications, and validations; Design reviews; Baseline change reviews; Work planning; and Self-assessments.  All modules have hardware identifiers which are tracked in a database logging QA data through all phases of construction, installation, operation and repair.  Graded Approach:  Apply appropriate level of analysis, controls, and documentation commensurate with the potential to have an environmental, safety, health, radiological, or quality impact.  Four ESH&Q Risk levels are defined and documented in CMS-doc-11584. 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 21 Trigger ESH&Q

22. LHC CMS Detector Upgrade Project Project Scope 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 22

23. LHC CMS Detector Upgrade Project  Threshold:  Demonstration of 98% agreement between the installed upgrade trigger electronics at CERN and software emulation of this electronics through test pattern injection based on data taken after LS1, followed by demonstration of reduction of calorimeter and endcap muon trigger rates for electrons, photons, muons and taus with respect to the present system by a factor of two for a reduction of less than 15% in efficiency using the trigger emulator run on data taken after LS1. Incorporation of unganged ME1/1a data into the endcap muon trigger logic.  Objective:  Demonstration of 99.5% agreement between the installed upgrade trigger electronics at CERN and software emulation of this electronics through test pattern injection based on data taken after LS1 followed by demonstration of reduction of calorimeter and endcap muon trigger rates for electrons, photons, muons and taus with respect to the present system by a factor of two for a reduction of less than 10% in efficiency using the trigger emulator run on data taken after LS1. Calorimeter Trigger electron and photon position resolution improved. Incorporation of unganged ME1/1a data into the endcap muon trigger logic. 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 23 Key Performance Parameters

24. LHC CMS Detector Upgrade Project  None  Since both muon and calorimeter triggers have full self-test capabilities, both threshold and objective KPP are satisfied w/o requiring connected inputs or outputs.  Trigger electronics can store up sequences of test patterns and inject them into the front end of the trigger electronics at speed  Trigger electronics can receive its output, process and record this at speed for subsequent readout by DAQ. 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 24 External Dependencies

25. LHC CMS Detector Upgrade Project Schedule 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 25

26. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade 26 Schedule/Milestones 26 August 2013, Wesley Smith  Targeting completion of L2 milestones 6 months earlier 401.04: 7 L2 Milestones, 8 L3 Milestones, 20 L4 Milestones L2 Milestones:

27. LHC CMS Detector Upgrade Project  Critical path follows second phase of module production driven by start at CD3  > 2 years float to project completion 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 27 Schedule – Critical Path

28. LHC CMS Detector Upgrade Project Risk Analysis 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 28

29. LHC CMS Detector Upgrade Project  16 risks:15 are threats and 1 opportunity:  https://cms-docdb.cern.ch/cgi-bin/DocDB/ShowDocument?docid=11707 https://cms-docdb.cern.ch/cgi-bin/DocDB/ShowDocument?docid=11707 Lucas Taylor, 26-27 August 2013 CD-1 DOE Review -- Risk Management 29 401.04 Trigger Risk Register Example risks

30. LHC CMS Detector Upgrade Project  Senior Engineer becomes unavailable (Low Risk)  Hire new engineer, subcontract to consulting firm, use FNAL engineer  Funding is delayed (Low Risk)  Commission with prototypes and/or fewer production boards  Software or Firmware does not meet requirements (Low Risk)  Hire extra expert effort to recover schedule and help personnel  Boards are delayed (design, manufacture or testing) (Low Risk)  Hire extra effort to speed up testing schedule  Vendor non-performance (Low Risk)  Acquire spending authority to use alternative vendors (while original funds are being unencumbered).  Input or output electronics (non-trigger) delayed (Low Risk)  Built in capabilities of trigger electronics provide signals for their own inputs & outputs  Overall Risk Mitigation Strategy:  Continue to provide fully operational current trigger system in parallel with upgrade commissioning  Partial operation of the upgrade systems provide tangible benefits from 2015 onwards 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 30 Overall Trigger Risks & Mitigation

31. LHC CMS Detector Upgrade Project Cost 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 31

32. LHC CMS Detector Upgrade Project  C&S understood since prototypes for all major cards have been built and have passed tests  Have vendor quotes for all parts  C&S based on experience of the same team that built and wrote software and firmware for existing trigger system  Hardware is based upon common μTCA hardware platform also used by HCAL and other CMS systems  Same team wrote software and firmware for existing trigger system → scope and requirements well understood  Requirements are frozen in approved Trigger TDR  Schedule is robust because it always provides a working trigger at each stage with parallel operation of old and new trigger systems, commissioning and testing of new system during data-taking (with data) and evolution to final system while providing immediate availability of improved trigger in 2015 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 32 Quality of Estimate

33. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade Base Cost = AY $K (No Contingency) 3326 August 2013, Wesley Smith Using the Slide TemplateBase Cost by WBS

34. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade 3426 August 2013, Wesley Smith Using the Slide TemplateM&S and Labor Base Costs M & SUniv. LaborTotal Base Cost 401.04.02 Trigger Management2250 401.04.03 MUON Trigger9271,5122,439 401.04.04 Calorimeter Trigger1,2571,1062,363 Grand Total 2,4092,6185,027 Base Cost & Estimate Uncertainty in AY K$No FNAL Labor in Trigger Project

35. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade 3526 August 2013, Wesley Smith Using the Slide TemplateLabor Resources by Fiscal Year

36. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade 3626 August 2013, Wesley Smith Using the Slide TemplateLabor Resources by Type

37. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade 37 Base Cost = AY $K (No Contingency) 26 August 2013, Wesley Smith Using the Slide TemplateCost Profile by Fiscal Year

38. LHC CMS Detector Upgrade Project 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 38 Trigger Design Maturity/Contingency M&S: 2.4 M$ (48% of total cost) Labor: 2.6 M$ (52% of total cost) Fraction of the cost of the project divided by cost estimate type

39. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade Base Cost & Estimate Uncertainty in AY K$ 3926 August 2013, Wesley Smith Using the Slide Template Base Cost & Estimate Uncertainty 0 0 M & SUniv. Labor Total Estimate Uncertainty Base Cost Estimate Uncertainty Base Cost Estimate Uncertainty $ % on base cost Total Estimate 401.04.02 Trigger Management2252900 13%254 401.04.03 MUON Trigger9274161,5126051,02142%3,460 401.04.04 Calorimeter Trigger1,2572501,10644269329%3,056 Grand Total2,4096962,6181,0471,74335%6,770 No FNAL Labor in Trigger Project

40. LHC CMS Detector Upgrade Project Summary 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 40

41. LHC CMS Detector Upgrade Project  Trigger Upgrades meet technical performance requirements  Scope and Specifications of Trigger Upgrade are sufficiently well-defined in TDR and CDR to support the C&S estimates  Risk managed by parallel operation of old and new trigger systems, commissioning and testing of new system during data- taking (with data)  Upgrade based upon common μTCA hardware platform and components used by other CMS systems  ES&H, QA plans, C&S based on experience with working prototypes  Management and Engineering teams are experienced with sufficient design skills, having designed and built original CMS trigger.  Trigger Upgrade not on CMS Project Critical Path  Ready for CD-1 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 41 Conclusions

42. LHC CMS Detector Upgrade Project Additional Slides 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 42

43. LHC CMS Detector Upgrade Project L1 Upgrade TDR  Final presentation to LHCC was Tuesday June 11th  Public version of the TDR here: https://cds.cern.ch/record/1 556311  Approved! 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 43

44. LHC CMS Detector Upgrade Project Process (x2 improvement highlighted) 1.1 x 10 34 cm –2 s –1 2.2 x 10 34 cm –2 s –1 CurrentUpgradeCurrentUpgrade W(e ),H(bb) 57.7%87.0%37.5%71.5% W(  ),H(bb) 95.9%100%69.6%97.9% VBF H(  ) 42.6%51.3%19.4%48.4% VBF H(  ) 24.4%44.3%14.0%39.0% VBF H(  ) 17.2%53.7%14.9%50.1% H(WW(ee )) 91.4%97.8%74.2%95.3% H(WW(  )) 99.9% 89.3%99.9% H(WW(e  )) 97.6%99.4%86.9%99.3% H(WW(  e )) 99.6%99.5%90.7%99.7% Stop  bW   e, jets (600 – 450 GeV) 55.8%68.2%50.3%64.8% Stop  bW    jets  600 – 450 GeV  78.1%81.6%76.4%84.5% RPV Stop  jets (200 GeV)70.1%99.9%43.6%99.9% RPV Stop  jets (300 GeV)93.7%99.9%79.7%99.9% Wesley Smith, 26 August 2013 CD-1 Review -- B04-1: Trigger Upgrade Overview 44 Physics Performance Summary (detail in breakout session talks) Average Improvement: 17% (Low Lumi) & 40% (High Lumi)

45. LHC CMS Detector Upgrade Project  CTP7 M&S: no HB/HE Backend until 2016  Delay purchase of 34 CTP7 cards until FY15  Use 12 CTP7 Cards w/prototypes as additional spares and for test setups.  EMU CSCTF M&S: one endcap in 2015 and other in 2016  Commission and test one endcap thoroughly so 2 nd can be integrated quickly  Delay spares and use prototypes for spares, test setups  Compatible with Global Muon Trigger using different Endcap inputs  Stages and Content: 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 45 Trigger Staging

46. LHC CMS Detector Upgrade Project  Consideration of alternative designs has been performed within constraints of upgrading trigger system in a running experiment and operating both present and upgraded trigger system in parallel to ensure an understood and functional trigger system at any point during data-taking.  Provide incorporation of alternative designs and architectures in design itself so that as physics priorities and beam conditions evolve, algorithms and trigger methodology can evolve as well.  Moving towards providing all available detector information at input of trigger logic so that trigger decision is not impacted by upstream selection of information.  Enables changes in trigger design to have as wide a range of options as possible. 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 46 Alternatives

47. LHC CMS Detector Upgrade Project CD-1 Review -- P05: Trigger Upgrade 47 Schedule/Milestones – Level 3 26 August 2013, Wesley Smith  Targeting completion of milestones 3 months earlier

48. LHC CMS Detector Upgrade Project Schedule/Milestones – Level 4 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 48

49. LHC CMS Detector Upgrade Project Response to Recommendations from Previous Reviews 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 49

50. LHC CMS Detector Upgrade Project  Develop a plan prior to the CD-1 review for procurement of components that need to be installed prior to the end of LS1.  Components are Muon Port Card Mezzanines and MPC- EMUTF Optical Fibers that must be installed in collision hall during LS1.  Components moved to the Operations Program budget since are improvements needed when CMS starts up at end of LS1.  Incorporate the missing information identified within comment section into the CDR prior to the CD-1 review.  This has been done and the CDR has been revised 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 50 Response to Recommendations from May Review

51. LHC CMS Detector Upgrade Project  Prior to the upcoming CD-1 review, initiate discussions on obtaining CD-3a approval for production of components needed for the initial steps in the proposed staged installation plan. These components will be essential for maintaining current trigger performance, especially if the accelerator is unable to operate with 25 ns bunch spacing.  CD-3a has been discussed with the DOE, and the Project will not seek a CD-3a approval prior to the DOE CD-1 Review. 26 August 2013, Wesley Smith CD-1 Review -- P05: Trigger Upgrade 51 Response to Recommendations from July Review