ME1/1 Upgrade and Installation Plans

V.Perelygin

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ME1/1 Upgrade: New electronics

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On-chamber:

•DCFEB (7 boards/ CSC)

•LVDB•LVMB•ALCT mezz

•Optical link to P.C.

Perifperal Crate:

•ODMB•TMB mezz•MPC

ME1/1a Un-ganging in the region 2.1<|η|<2.4

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66 77

LVDB

ME1/1a 3-to-1Connect. Scheme:3 strips to one CFEB channel:

With 7 DCFEBs: 1 strip → 1 channel

ME1/1 Upgrade advantages:

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1.Unambiguous trigger operation in the region 2.1<|η|<2.4 (no ghosts)

2. Electronics with higher rate capability

3. Readout robustness ( Optical readout replaces 50-pin SC cables having up to 14.5m length)

4. ME1/1a: 18% noise decrease → Spatial resolution improves from 60 µm to 52 µm

ME1/1 Upgrade: organization

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2 working groups: 1.At UXC-CSC extraction/ loading-CSC transportation-Machinery works-SC cables cutting -Optical cables routing -ME1/1 P.Panel modification

2.At the ME1/1 Assembly Room-Old electronics disassembly-New electronics implementation-Chamber tests with new FASTDAQ software

ME1/1 CSC installation

V.Perelygin CMS Upgrade Week and Workshop Nov. 08-2011

Bottom CSC installation with ~5m extension bar

6

Loading Machine

Need Crane + Cherry picker

ME1/1 Zone

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ME1/1 P.Panel

20º cable trays

To be redone for optical cables

CSC opt. P.Panel

Time estimation – UXC works

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Remove CSC from disk: 2 ÷ 3 chambers / day (~8 hours) Crane + Cherry picker 2 persons

Install CSC: ~2 chambers / day (~8 hours) Crane + Cherry picker 2 persons Board change on the installed CSC: 4-6 hours Crane + Cherry picker 2 persons

LS1 schedule - time in UXC with crane

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• Remove CSC – all 72 in one time period

• Reinstall CSC – in 2 separate time periods (36+36)

Means that we need to store all the chambers: 72+4 spares upstairs.

ME1/1 Assembly Room + Storage area

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Ar+CO2 ; LV

For the tests a new FASTDAQ software should be developed.

Assembly room: where ?

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SX5! But for ALL CSC now only 100m2 is reserved… Need to decide.

ME1/1 Upgrade cycle

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1.Extraction

2. CSC are in dosim. quarantine at UXC (?)

3.Old electronics disassembling new one installation. FASTDAQ tests w/o HV

4. Storage area: burn-in testing.Gas flow, LV=ON

5. Full FASTDAQ Tests: LV, HV. CSC passport

6. Loading

Machinery(Workshop)

Ped.noise

Landau

CFEB, LVDBGo to ME 4/2

Tests on Disks

• Installed CSC should be connected to the VME

electronics and tested with small FASTDAQ setup

(LV tests).

• In the case of board failure after installation CSC

should be extracted and board changed.

• There should be more time reserved for CSC

installation than that for extraction.

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Electronics tests at ISR and on- chamber integration

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• It is very important to know how much the boards installation and test work takes. For this we need to work with a CSC fully equipped with the new electronics.

• Now at ISR we test new LVDB with 7 CFEBs installed on spare ME1/1 CSC

• On-chamber integration (drawings in preparation):- Optical cables routing and optical P.Panel position, - New cables: LV, in ME1/1a: Strip readout and DCEB-DCFEB - Mechanical works for ME1/1a area: new screens and support details- CFEB & ALCT covers to be machined to match DCFEB geometry

• End of this year – out of ISR…. ->SX5?

Conclusion

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• The Upgrade of ME1/1 electronics is important and challenging

• The work to be done during LS1

• A lot of things not yet defined and scheduled

• On-chamber Integration work is going on

• Problem with Testing/ Assembling areas – place to be defined

Backup slides

Backup slides

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Extraction/ Installation Procedure

• Works to done beforehand (Cherry picker needed ): Sealing opening, P.Panel opening, Cables disconnection Could be done at any time before chamber extraction for a number of CSC.Preparation for 4 CSCs – one day.

• Preliminary operations (if some EMU CSC work):- HV zeroed for CSC to be extracted and other 3 CSC in the same gas chann.- Corresponding Maraton switch off → 9 ME1/1,2,3 CSC off (trigger sector)- Gas channel on the ME1/1 gas panel disconnected

• Main work (Cherry picker +Crane) needed :- preparations in UXC

(Loading machine posts installation, Cooling channel off, Gas/water pipes)- CSC extraction (loading), (2-3 CSC / 8hours).

• Subsequent works- Services back (water, gas, LV)- HV ON

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FASTDAQ tests at ISR: CSC 8B- (3 CFEBs in ME1/1a)

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Test 15 CFEB noise

Test 21 Comparator