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For discussion:

What was shown at the upgrade plenary Weds.

Discuss the outline of the muon TP section Additional thoughts

Muon preparation for the Phase 2 TP1

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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

Recap of muon Phase 2 plans2

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Proposed at ECFA workshop, Oct. 2013

High Rapidity Muon (HRM) layout

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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

Organization for the muon part of TP

…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

4

CONSOLIDATION roadmap

• 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

Muon Upgrades TP Coordination

-- Consolidation of existing detector

-- High etadetector extensions

DT

RPC

CSC

5

HIGH ETA EXTENSIONS

• What needs? • What constraints? • Integration in CMS? Si-

Tracking? Calorimetry?• What options? Costs?

Priorities?• Workplan;

organization; schedule

Muon Upgrades TP Coordination

-- Consolidation of existing detector

-- High etadetector extensions Simulation, Physics, trigger

New Detectors and R&D

Electronics R&D

Integration into CMS; infrastructure

Costing

6

Muon Upgrades TP Coordination

-- Consolidation of existing

detector-- High etadetector extensions

DT

RPC

CSC

Simulation, Physics, trigger

New Detectors and R&D

Electronics R&D

Integration into CMS; infrastructure

Costing

Muon Upgrades TP organization

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

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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 planning8

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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 needed2.2 CSC (chamber aging), including R&D needed2.3 RPC (gas), including R&D needed

3. High eta detector extensions – overall design ~3 pp3.1 Detailed motivation for new detectors (simulations, trigger)3.2 Design considerations3.3 Detector overview3.4 Infrastructure requirements

4. The GEM detectors within existing coverage (GE1/1, GE2/1) ~4 pp4.1 System overview4.2 GEM detectors4.3 On-chamber electronics4.4 Electronics layout4.5 R&D needed

TP muon section outline (part I)9

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5. The advanced RPC detectors within existing coverage (RE3/1, RE4/1) ~4 pp5.1 System overview5.2 Advanced RPC detectors5.3 On-chamber electronics5.4 Electronics layout5.5 R&D needed

6. The eta extension ME0 ~3 pp6.1 System overview6.2 High granularity detectors6.3 On-chamber electronics (if different from GE1/1 etc.)6.4 Electronics layout6.5 R&D needed

7. Performance estimates ~2 pp8. Project planning (or does this belong in a later section of the TP

overall?) ~2 pp8.1 Organization8.2 Timescale for R&D and production8.3 Plans towards TDR

9. Cost estimate ~2 pp

TP muon section outline (part II) 10

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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)

Coordination11

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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?

Next steps12

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

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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)

Additionally13

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Backup slides14

15Longevity of Phase 1 Muon systems

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

o 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

o 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

0.3 C/cm limit tested

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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)

DT Minicrate replacement16

First level of DT read-out and trigger

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Example: L1 rate limitation 300-500 kHz

Estimated occupancy region

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18

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

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19Bending 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)

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20ME0-ME1/1 bending for eta 2.14-2.4

“Close” chambers have worse separation, still pretty good

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

close

far

Tools used: fast simulation with CSC sim hits

— propagate CSC sim to GEM layer

— emulate detector channel resolution

— compute bending angle

New simulation results (Krutelyov)

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21

GE2/1-ME2/1 bending

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

close

far

Tools used: fast simulation with CSC sim hits

— propagate CSC sim to GEM layer

— emulate detector channel resolution

— compute bending angle

New simulation results (Krutelyov)

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22Trigger rate reduction: summary

~4.5

New simulation results (Krutelyov)

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