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Phase 2 muon plans (presented at ECFA), What’s new since Upgrade Week New upgrade management (presented today

at MB) Organizing to write the muon section of the

Phase 2 TP

Muon plans for the Phase 2 TP1

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Recap: the Phase 2 muon plans

Three main aspects: 1. Aging studies, replacement

GIF++ tests for CSC and RPC chamber aging, DT components Freon replacement for RPC gas after LS3 DT minicrate replacement

2. 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

3. 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

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Proposed at ECFA workshop

High Rapidity Muon (HRM) layout

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If endcap calor not replaced, propose GE1/1 as envisioned in LS2 Endcap calor replacement: now in detailed engineering discussions

Space will likely be available for ME0 Is it the “ME0” we are used to? (eta>2.1 for muon tagging, ~6 layers) Or is it “ME0/1” and “ME0/2” where the latter covers 1.6<eta<2.4 and has more

lever arm to ME1/1 than GE1/1?

What’s new in the endcap region

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Pros: More trigger lever arm than GE1/1, could be more than 2 layers Could match precisely to eta=2.4 boundary of ME1/1 Can seek an “integrated” solution, more cost-effective?

Cons: No opportunity to install in LS2 Could suffer neutron “leakage” from higher eta or higher punch-

through from jets than GE1/1

Pros and cons of ME0/2

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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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7ME0-ME1/1 bending for eta 2.14-2.4

“Close” chambers have worse separation, still pretty good

Bending angle works well in ME0 to reduce trigger rate

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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Presented today at MB There is a muon phase 2 “box” in the

organization chart Responsible to upgrade management IMO, should also be responsible to muon IB

This is not a permanent structure, it is intended for converging on the TP plans and document (to be submitted to the RRB in Fall 2014)

Longer-term muon management structure, including the Phase 2 upgrade: Subject of discussion, SP-elect does not want to

jeopardize LS1 upgrade and subsequent commissioning

Will discuss this at the muon IB in December with the SP-elect

New upgrade management for 2014

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From MB176 https://indico.cern.ch/getFile.py/access?contribId=14&resId=0&materialId=slides&confId=282923 today:

Upgrade organization chart for 2014

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Muon responsible(s?) in the upgrade organization need to be selected, and form a sub-organization Should coordinate with muon PMs and IB

Participate in TC meetings – endcap replacement discussions Engineering studies – define muon endcap “envelope”

Internal costing review(s) Decisions on which muon items to be proposed

All will be carefully reviewed by LHCC - need excellent motivation

Drafting the TP muon section (first draft due by Mar. 31)

Much needs to be done