Muon preparation for the phase 2 tp
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Muon preparation for the Phase 2 TP. For discussion: What was shown at the upgrade plenary Weds. Discuss the outline of the muon TP section Additional thoughts. Recap of muon Phase 2 plans. Three main aspects (details in backup slides): Aging studies, replacement

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Muon preparation for the Phase 2 TP

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Muon preparation for the Phase 2 TP

For discussion:

  • What was shown at the upgrade plenary Weds.

  • Discuss the outline of the muon TP section

  • Additional thoughts


Recap of muon Phase 2 plans

  • Three main aspects (details in backup slides):

  • Aging studies, replacement

    • GIF++ tests for CSC and RPC chamber aging, DT components

    • Freon replacement for RPC gas after LS3

    • DT minicrate replacement

  • Forward muon trigger and redundancy

    • GE1/1 and GE2/1 based on improved L1 trigger, redundancy in the most intense region

    • RE3/1 and R4/1: timing for background rejection and PU mitigation

  • Forward muon tagging extension (ME0)

    • Large eta coverage (~2.1-4.0) for big acceptance, S/N boosts in modes with muon

    • Hermeticity for modes excluding muons


High Rapidity Muon (HRM) layout

  • Proposed at ECFA workshop, Oct. 2013


Organization for the muon part of TP

  • Mindful of the very compressed timescale …

    • 1 mo (mid-Jan.): Detector conceptual designs frozen for physics perf.

    • 3 mo (late-March): First draft of sections, plans to complete

    • 5-6 mo (early July): Full draft to internal readers

  • …muon IB approved yesterday a simple organizational structure just for preparing the muon part of the TP

  • A single coordinator (JH) for both main aspects:

    • Consolidation of the existing detector

    • High eta detector extensions

  • Contact persons to coalesce the various aspects of the muon TP

    • Names to be announced in ~1 week


CONSOLIDATION roadmap

CSC

  • Chamber longevity

  • Radiation tolerance

  • FE longevity / rate capability; back-end electronics

  • Workplan of tests to be performed; milestones

  • Trigger primitive generation

  • Expected performance - Pile-Up ; simulations; degradation scenarios

  • Cost of interventions

DT

Muon Upgrades TP Coordination

RPC

-- Consolidation

of existing detector

-- High eta

detector extensions


Muon Upgrades TP Coordination

HIGH ETA EXTENSIONS

-- Consolidation

of existing detector

  • What needs?

  • What constraints?

  • Integration in CMS? Si-Tracking? Calorimetry?

  • What options? Costs? Priorities?

  • Workplan; organization; schedule

-- High eta

detector extensions

Simulation, Physics, trigger

New Detectors and R&D

Electronics R&D

Integration into CMS; infrastructure

Costing


Muon Upgrades TP organization

CSC

Contact persons supervise the writing of muon TP parts, report to muon TP Coordination

DT

Muon Upgrades TP Coordination

RPC

-- Consolidation

of existing detector

Simulation, Physics, trigger

-- High eta

detector extensions

New Detectors and R&D

Electronics R&D

Integration into CMS; infrastructure

Costing


TP muon section planning

  • Modeled somewhat after the organization of the 1994 overall TP for the CMS detector

  • Integrate this with the organization chart

  • Pages:

    • Aim for nearly 60 pages on a 1st draft

    • Subsequently fit it into 30 pages as requested

      • Put much information into CMS notes that can be referenced – needs discussion


TP muon section outline (part I)

1. Introduction: main motivation and goals for upgrade, outline of the section ~2 pp

2. Phase 1 detector longevity ~10 pp:

2.1 DT (electronics), including R&D needed

2.2 CSC (chamber aging), including R&D needed

2.3 RPC (gas), including R&D needed

3. High eta detector extensions – overall design ~3 pp

3.1 Detailed motivation for new detectors (simulations, trigger)

3.2 Design considerations

3.3 Detector overview

3.4 Infrastructure requirements

4. The GEM detectors within existing coverage (GE1/1, GE2/1) ~4 pp

4.1 System overview

4.2 GEM detectors

4.3 On-chamber electronics

4.4 Electronics layout

4.5 R&D needed


TP muon section outline (part II)

5. The advanced RPC detectors within existing coverage (RE3/1, RE4/1) ~4 pp

5.1 System overview

5.2 Advanced RPC detectors

5.3 On-chamber electronics

5.4 Electronics layout

5.5 R&D needed

6. The eta extension ME0~3 pp

6.1 System overview

6.2 High granularity detectors

6.3 On-chamber electronics (if different from GE1/1 etc.)

6.4 Electronics layout

6.5 R&D needed

7. Performance estimates ~2 pp

8. Project planning (or does this belong in a later section of the TP overall?) ~2 pp

8.1 Organization

8.2 Timescale for R&D and production

8.3 Plans towards TDR

9. Cost estimate ~2 pp


Coordination

  • Physics coordination to “drive” the physics discussion for muons

  • Significant interplay with trigger upgrade section

  • Significant interplay with endcap calorimeter (geometry, infrastructure)

  • Need to coordinate with GE1/1 TDR as well as active GEM meetings (as well as muon sim, DT, CSC, RPC meetings)


Next steps

  • Fill the contact person positions (~1 week)

    • For efficiency, mostly 1 name/box… some deserving individuals will be left out 

  • Expect to use Monday 5 p.m. General Muon Meeting for

    • A) high eta extension discussions

    • B) existing detector consolidation discussions

  • Given the schedule, defining the detector parameters and right simulations is highest priority

    • ME0 is most interesting: space in Z (thickness), rapidity coverage 2.1-4.0 or ??, number of layers, granularity, polyethylene, steel shielding?

Friday 9:00 in Salle A:

a special “phase 2 ad hoc muon” meeting (apologies to Physics plenary):

https://indico.cern.ch/conferenceDisplay.py?confId=288056


Additionally

  • Would like to create “muon phase 2” email list, hypernews forum

  • Need to optimize meeting-ology

    • Try to avoid existing DT, RPC, CSC, GEM meetings

    • Combine some meetings?

    • Request meeting room space?

  • Decisions on scope and important branch points:

    • Will be discussed in muon IB, seek unanimity…

    • but upgrade management has decision power (Tiz)


Backup slides


Longevity of Phase 1 Muon systems

  • Measured rates are linearly increasing with luminosity and with a strong η dependence as expected from simulation

  • No aging effects have been observed so far

    • Test have been performed up to 0.3 C/cm - only forward CSC station will exceed this limit after 3000 fb-1 - new tests including readout will be performed at the GIF++ facility to confirm aging properties of all systems

  •  The muon systems are expected to sustain 3000 fb-1

Integrated charge collected in CSCs after 3000 fb-1

0.3 C/cm limit tested

  • Construction tests of the radiation damage to FPGAs in the DT read-out indicate that they need to be replaced for Phase 2 operation

    • The new electronics design will not limit the L1-trigger rate


DT Minicrate replacement

  • There is a host of reasons for minicrate replacement:

    • ASICs and boards will be very old

    • Radiation tolerance is questionable – needs investigation

    • Bandwidth is limited to 300-500 kHz

    • Interventions are very delicate

    • Power consumption is high

    • Performance with high background rates can be much enhanced

  • No “sound bites”, but the totality is a pretty strong case (Cristina)

First level of DT read-out and trigger


Example: L1 rate limitation 300-500 kHz

Estimated occupancy region


GE1/1: trigger motivation

  • The leading motivation is to improve muon triggering in this region

    • Rate reduction from bending angle and increased efficiency from added redundancy


Bending angle and multiple scattering

  • Practically no sensitivity away from zero in YE3 and YE4

  • ME0 (YE-1) has the best separation from zero

    • Some gain still expected from bending angle in GE2/1

  • RE3/1,4/1 no use from bending angle==> use them only for redundancy

  • ==> next slides focus on bending angle information

  • New simulation results (Krutelyov)


    ME0-ME1/1 bending for eta 2.14-2.4

    close

    far

    • “Close” chambers have worse separation, still pretty good

    • Bending angle works really well in ME0 (not as good as GE1/1 though)

    New simulation results (Krutelyov)

    Tools used: fast simulation with CSC sim hits

    — propagate CSC sim to GEM layer

    — emulate detector channel resolution

    — compute bending angle


    GE2/1-ME2/1 bending

    close

    far

    • GE2/1 can give 40% decrease in trigger rate for 2.14-2.4

    New simulation results (Krutelyov)

    Tools used: fast simulation with CSC sim hits

    — propagate CSC sim to GEM layer

    — emulate detector channel resolution

    — compute bending angle


    Trigger rate reduction: summary

    New simulation results (Krutelyov)

    ~4.5


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