The CMS GEM Project Install triple-GEM detectors (double stations) in - - PowerPoint PPT Presentation

▶
the cms gem project
SMART_READER_LITE
LIVE PREVIEW

The CMS GEM Project Install triple-GEM detectors (double stations) in - - PowerPoint PPT Presentation

Nov 16, 2022 446 likes •747 views

The CMS GEM Project Install triple-GEM detectors (double stations) in 1.5<| |<2.2 endcap region: Restore redundancy in muon system for robust tracking and triggering Improve L1 and HLT muon momentum resolution to reduce or

slide-1
SLIDE 1

1

LS2 LS3

The CMS GEM Project

GE1/1 Install triple-GEM detectors (double stations) in 1.5<|η|<2.2 endcap region: GE2/1  Restore redundancy in muon system for robust tracking and triggering  Improve L1 and HLT muon momentum resolution to reduce or maintain global muon trigger rate  Ensure ~ 100% trigger efficiency in high PU environment for RUN III

https://twiki.cern.ch/twiki/bin/view/MPGD/CmsGEMCollaboration

slide-2
SLIDE 2

Possible ME0 Being investigated

2 GMM - Archana Sharma - 3/2/2014

slide-3
SLIDE 3

3 Rate capability : 105Hz/cm2 Spatial/Time resolution: ~ 100 m / ~ 4-5 ns Efficiency > 98% Gas Mixture: Ar-CO2-CF4 (non flammable mixture)

V=const.

~400 V

Gas Electron Multiplier (GEM)

  • Combine triggering and tracking

functions

  • Enhance and optimize the readout

(η-φ) granularity by improved rate capability

  • GEM foils developed using PCB manufacturing techniques
  • Large areas ~ 1m x 2m with industrial processes (cost eff.)
  • Each foil (perforated with holes) is 50μm kapton sheet with copper

coated sides (5μm)

  • Typical hole dimensions : Diameter = 70μm, Pitch = 140μm,

50-80kV/cm

slide-4
SLIDE 4

4

View from the top of CMS down

Motivation: Exploiting GEM-CSC Bending Angle

Vadim Khotilovich (Texas A&M University) Simulation Studies – Alexei Safonov and Anna Colaleo

  • An increased lever arm of the combined

CSC+GEM system allows accurate measurement

  • f the bending angle

– Note that half of CSC-GEM chamber pairs are “close” and the other half is “far” (see the figure above)

  • Excellent discrimination power to distinguish soft

muons from hard

– Larger lever arm for “far” chambers provides even better separation

Preliminary Preliminary

slide-5
SLIDE 5

CMS GEM Collaboration RD10.01 Project Milestones (i)

OVER FOUR YEARS OF R&D

  • 2009-2010

– Small prototypes, bench tests; picked GEMs among MPGDs for further study – Established space and time resolution achievable – First Large-area GEM foils produced with Single Mask technology – First large-area GE1/1 prototype; beam test

  • 2011

– Second redesigned GE1/1 prototype (smaller gaps b/w GEMs) – “GEM Collaboration (GEMs for CMS)” constitutes itself in May CMS week (76 collab. from 15 inst. ) – Summer beam tests (including first test in CMS test magnet) – Established 100µm (300µm) res. with analog (binary) r/o chip – NS2 GEM foil assembly technique w/o spacers – Preliminary electronics design starts

5

slide-6
SLIDE 6

2012

  • Beam tests – Magnetic Field Operation and fine space and time resolution on

large size established

  • Working Groups (Physics, Trigger Simulations, Integration Services, Electronics

and DAQ, Detector HW) with weekly meetings

  • Third GE1/1 prototype designed (new GEM design “NS2”; and readout),

5 detectors produced! One more to be assembled outside of CERN

  • Started GIF long term aging test
  • Collaboration Expanded 42 Institutions, 183 collaborators EOI
  • GE1/1 - 6 Detectors produced in 2013 (Two outside CERN); 6 potential

production sites

  • Beam test at Fermilab with GE1/1 + 6 smaller detectors
  • Long term tests + Materials study Launched
  • Electronics and DAQ groups take big steps : proto FPGA /GEB/uTCA in hand
  • TDR requested by CMS management; Slice Test Approved (DESY MB 2013)
  • GE1/1 – 10 “Final” detectors launched for production: 3 Long on way
  • TIF Area being readied for “Proto-Slice Test”

2013

CMS GEM Collaboration Project Milestones (ii)

6

2014

slide-7
SLIDE 7

CMS Project Achievements Together RD51 and CERN Surface Treatment Workshop

7

  • Detector efficiencies above 98%
  • Spatial resolution of about 290μm with VFAT2 (digital)

and <110μm APV (analog) readout chip

  • Time resolution of 4ns
  • Operation of GEMs in magnetic field
  • Validation of single-mask technology
  • Production of large area GEM foils
  • New self-stretching technique for GEM assembly
slide-8
SLIDE 8

Full-size GE1/1 Detectors Developments in Time

8

2010 Generation I

The first 1m-class detector ever built but still with spacer ribs and only 8 sectors

  • total. Ref.: 2010 IEEE

(also RD51-Note- 2010-005)

2011 2012 2013 Generation II

First large detector with 24 readout sectors (3x8) and 3/1/2/1 gaps but still with spacers and all glued. Ref.: 2011 IEEE. Also RD51-Note-2011- 013.

Generation III

The first self- stretched sans- spacer detector, but with the outer frame still glued to the

  • drift. Ref.: 2012 IEEE

N14-137.

Generation IV

The current generation that we have built two

  • f at CERN so far,

with four more to come from the different sites. No more gluing whatsoever. Several papers MPGD 2013 / IEEE

2013/14 Generation V

The upcoming detector version that we will install. One long and one short version. Optimized final dimensions for

  • max. acceptance

and final eta segmentation. 10 Detectors Launched for 2014

Luigi Benussi and Marcus Hohlman

slide-9
SLIDE 9

SINGLE MASK RUN = 175 HV = 4.50 kV I = 738.90 uA Thr = 40 Vu

η = 99.5%

Position = P1 Gas: Ar/CO2 (70:30)

RUN = 37 – 181 Thr = 40 Vu Lat = 14 Position = P1

CMS/GE11_efficiency_p1_09012011 CMS/GE11_SpRes_p1_09012011

Excellent performance observed:

  • ≥ 98% efficiency
  • 230 µm resolution

(  pitch/12 for binary electronics)

  • uniform performance in different sectors

9

Track residuals Efficiency

ge11_residuals

1st Generation I - GE1/1 Detector

slide-10
SLIDE 10
  • Successful data taking with analog APV chip and Scalable Readout System in addition to

TURBO/VFAT2 DAQ system

  • Measured resolution σx<103μm in section with smallest pitch

μ-/π - beams Δxhit measurement : Tracker GEM vs. CMS full-size GE1/1

10 <cluster size> = 3.4 <cluster size> = 2.6

Strip cluster size

2nd GE1/1 Detector (2011)

slide-11
SLIDE 11

GEM Foil Stretching (III)

Current state-of-the-art: Self-stretching assembly without spacers (CERN) Readout PCB GEMs Drift electrode Tightening the horizontal screws tensions the GEMs Detector base pcb Allows re-

  • pening of

assembled detector for repairs if needed

  • nly glue joint in assembly

2012

slide-12
SLIDE 12

12

GEM foil in inner frame assembly GEM foil with inner & outer frame

Inside of readout board with O-ring seal -sector with 384 radial readout strips

Base pcb with drift electrode No spacers in active volume

Generation IV - GE1/1 Detectors (2012)

slide-13
SLIDE 13

CMS GEM Aging Tests at CERN GIF

  • J. Merlin
  • J. Merlin
slide-14
SLIDE 14

DAQ and Electronics

14

Global Requirements on electronics: provide necessary input from all GEM detectors to Muon Triggering and Tracking

  • GEM detectors:

 Design optimized for gas detectors, in particular GEMs

  • Triggering:

 Provide “Fast OR” trigger information with granularity of 2 or more channels to send locally to CSC Trigger Mother Board  Timing resolution <8ns

  • Tracking:

 Provide full granularity tracking data on receipt of a LV1A  Be compatible with CMS trigger upgrade possibilities:

  • LV1A latency < 20μs
  • LV1A rate < 1MHz

Paul Aspell & Gilles de Lentdecker

slide-15
SLIDE 15

DAQ and Electronics

15

FPGA/ GBTs VFAT3/GdSP DC/DC converters Power Supplies LV HV Optical links @ 3.2Gbps mTCA crates

Ser/Des

Trigger DAQ DCS TTC

On Detector

GLIB GEM_PCB AMC13

Off Detector

Links to CSCs

GBT protocol Or 8b/10b encoding ?

2 Bidir. optical link @ 3.2 Gbps

  • P. Aspell & G. de Lentdecker
slide-16
SLIDE 16

VFAT3

16

  • VFAT3 chosen for the 2016 Slice Test and GE1/1 full installation during LS2
  • VFAT3 analog discriminator will use CFD or TOT to correct time walk
  • VFAT3 STT version (Separate

Tracking & Triggering)

  • GEM OptoHybrid contains FPGA

performing “concentrator” and driving optical link @ 3.2Gbps; FPGA programming via the GBT

  • P. Aspell
slide-17
SLIDE 17

Trial Installation in CMS - 2013

17

Andrey Marinov and Antonio Conde Garcia

slide-18
SLIDE 18

09/02/2014

  • A. Marinov

18

GE1/1 Super-Chamber cable path GE1/1 Super-Chambers slot We have ~ 20 mm clearance in height

slide-19
SLIDE 19

GE1/1 Slice Test in 2016: YE-1

19

GE1/1-Slice TEST SLOTS 1-2; 35-36 Gas Racks

slide-20
SLIDE 20

Integration Tests at TIF: GEB & Hybrids

  • Measurement setup is functional at

TIF. – Able to readout hybrids using TURBO readout system – Waiting for Optohybrid V1

joonas.petteri.talvitie@cern.ch

slide-21
SLIDE 21

GE1/1 Mockups at TIF

21

Barthel Phillips : Aachen 2013

slide-22
SLIDE 22

Overlapping

22

slide-23
SLIDE 23

Readiness for Slice Test : Integration

23

Installation at P5 will take place after middle of March

Validation of the mechanics. Validation of the services paths Commissioning of the gas lines with Ar.

The “Installation” in TIF is done on the

  • ptical table.

Alignment trials are foreseen, Zoltan and team involved Will be used for the new GEB and Strips boards development in order to validate the mechanics

slide-24
SLIDE 24

Cosmic stand and DAQ

24 uTCA Crate in Lab GLIB AMC13

Ongoing Work Cu Box test stand for Chamber QC xDAQ Developments started Cosmic stand mechanics preparation Gas system is ready, Additional bottles have been ordered, including big CF4 cylinder Team being developed Clear plan needed from this workshop: Andrey Marinov Sasha Zakharov Jared Sturdy Brian Dorney + 2 Students (Phd/Technical) Welcome to participate !

slide-25
SLIDE 25

GE1/1 Slice Test Schedule

25

2014/15 YETS 2015/16 2016/17 2017/18 2018/19 Production and QC of detectors First prototype

  • f VFAT3

Slice installation Slice and trigger commissioning Full-production of chambers and electronics started Full installation

  • f GE1/1 with

final electronics QC of Production GE1/1 chambers with final electronics

slide-26
SLIDE 26

Status of GE1/1 Project

  • Write the TDR (for the first station GE1/1) – small delay
  • Align TDR schedule with TP i.e. circulate in CMS May/June Submit to LHCC

Sep/Oct.

  • Slice test 2016-2017 (VFAT3 final version to be used); 3/10 final chambers

launched

  • Trial installation of full size dummy chambers imminent
  • Gas Installation will be ready in June 2014
  • GEM Collaboration participation in Muon TP

– GE2/1 Geometry possibility of covering upto  = 2.4 – ME0 Geometry 6-8 Layers of Muon tagging/triggering detectors being investigated for TP

slide-27
SLIDE 27

TDR Timeline

  • TDR evolution (to be fine-tuned …):

 Version 1.00: definition of chapters and subsections (Table of Content)

  • Dec. 25, 2013

 Version 2.00: full draft, all chapters complete (as far as possible) mid March, 2014, next GEM workshop ?  Version 3.00: full draft including comments from GEM editorial group, for circulation to GEM Collaboration April, 2014  Version 4.00: full draft to internal CMS readers June, 2014  Version 5.00: full draft to CMS Collaboration July, 2014

27

Responsible: Michael Tytgat & Archana Sharma

slide-28
SLIDE 28

Slice Test Chapter

  • Agreed to add additional chapter/appendix on Slice Test
  • Chapter editors: Andrey Marinov & MT
  • Input for subsections ?
  • Introduction
  • Motivation & specific goals
  • Chamber description & location
  • FE electronics & DAQ
  • Online monitoring tools
  • ??

28

Responsible: Michael Tytgat & Andrey Marinov

slide-29
SLIDE 29

Summary and Outlook

  • Work for GE1/1 Project is on track
  • GE2/1 and ME0 well into simulations
  • GE1/1 Slice Test Chambers and Electronics integration foreseen at TIF

– good prep but lots to do

  • Imminent Goals

– Slice Test Services to be completed during LS1 – Slice Test Chambers, electronics, DAQ f/w and s/w: Prototype operational – Team and responsibilities for Slice Test and LS2

29