Cacac

1
Status and Perspectives
Request CMS status in general, mainly the
tracker and calorimeter, an overview of the
physics challenges that we have to face and life
after the start of LHC ( super LHC)
T. S. Virdee CERN/Imperial College Mont St Odile,
29 March 2006
2
Outline of Talk

• Current Construction Status to the Endgame
• Assembly at point 5, Bat 904Commissioning and
  Burn-in of electronics, Trigger/DAQ
• ECAL and Tracker
• MTCC Shakedown of hardware chains - end-to-end
  
• Lowering of the Experiment and Hardware
  Commissioning
• Commissioning for Physics
• Software Readiness Reviews, MTCC preparation
• Computing (CSA06, T0/T1/T2..)
• Physics TDRs, Startup, Trigger Tables, HLT,
• 2007 FEDs ? Desktop, Cosmics data ? Desktop,
  Pilot Physics Run
• Physics
• 2008 onwards - first rediscover SM, then make
  discoveries ! Latter is what we built the
  detector for !
• Longer Term Future
• Completion of High Luminosity Detector, SLHC
  upgrades

3
Construction Progress

• Commissioning in large sub-parts (checking
  systems aspects!) is underway.
• Civil Engineering UX will be ready to receive
  CMS elements by mid-2006. Forward shielding
  blockhouses lowered. Gantry crane erected
• Magnet coil is state of the art - now cold.
  Close yoke in May, Energize in June.
• Tracker TIB, TID well advanced, TEC, TEC-,
  TOB integration all started, cabling simplified,
  TIB,TOB,TEC in Support Tube by Nov. Tracker to be
  taken to Pt 5 end-Jan07
• ECAL 75 of barrel crystals delivered, 6 out of
  36 SM integrated with electronics. Lower 30-32
  out of 36 equipped SMs in Oct/Nov 2006.
• HCAL source calibration completed of HB, HE, 1
  HF, Lower HF in July
• Muon system Over 3 out of 5 wheels worth of DTs
  installed, cabling proceeding apace, cosmics
  being taken, Most of CSCs commissioned with
  cosmics. Over half of RPCs installed.
• Trigger-DAQ L1-Trigger core being tested in EIC
  (also tests back-end electronics, burn-in power
  supplies) 1/8th DAQ at Point 5.
• CPT Submitted Physics TDR Vol1 to LHCC in Jan.
  Preparing for Cosmic Challenge and CSA06 in
  Q406 using new Framework. Submit Physics TDR Vol2
  in for June LHCC, Vol 3 (HLT and Startup) for Jan
  07 LHCC.

CMS initial detector will be ready for collisions
in 2007.
4
CMS Solenoid
Magnet reached nominal operating temperature for
the first time on 25 Feb. Cooldown took 24 days.
Energize in June. Cool-down achieved by pumping
helium gas at liquid nitrogen temperature
(-196oC) and then as liquid helium. Coil 14.5t
sc cable, 74t pure Al, 126t high strength Al
300
K
max
210
min
120
0
15/2
3/2
25/2
5
Barrel DT/RPC Muon Ch in YB0
Lower YB0 in Oct06
6
Endcaps
Lower in September
RPCs on YE2
CSCs and RPCs on YE1
7
Cabling on YB1
8
HB Readied to be Inserted into Coil
Lower HB in Oct/Nov
Barrel Yoke wheels YB2 and YB1 80 (out of
210) DT/RPC Ch. Installed 40 Ch. commissioned
9
Testing ECAL SM insertion
10
Tracker TIF Rod Insertion in TOB
TOB completion is on Critical path TOB Aug 06,
TOB - Oct 06 Move Tested Tracker to Point 5 in
Jan07
11
Tracker TIB - Layer 4 (Pisa)
TIB/TID at CERN May06 TIB/TID- at CERN Aug06
12
Tracker Endcaps
TEC at Aachen
TEC- at CERN TECs also on CP
TEC at CERN Sep 06 Accelerate ?
TEC- ready at CERN Nov 06 Accelerate ?
13
ECAL SM Electronics Integration
Lower 90 of barrel SMs in November
14
ECAL Barrel Dashboard
05
06
07
SM0
SM17
SM35
15
Electronics Integration Centre
16
Trigger Integration in Bat 904

• Large scale successful integration tests in
  central racks using common TTC infrastructure
  involving trigger primitives, regional global
  processing
• Calorimeter Trigger
• Muon Trigger
• Global Trigger

17
CMS Master Schedule
Magnet closed May 06 Magnet
test/cosmic challenge May-Aug 06 EB
installation Aug 06 SX5 USC ready for
crates April-May 06 UXC cable chains
installed April 06-Jun 06 HF lowering
July 06 YE/YB cable chains cabled June
06 YE3 lowering start Aug 06 UXC ready for
crates Jul 06 First connection to USC
Aug-Sep 06 YB0 lowering start Oct 06 EB-
installation Oct 06 SX5 May07 UXC Tracker
installation Jan-Feb 07 ECAL/Tracker
cabling complete Apr-May 07 Heavy lowering
complete Feb-Mar 07 Initial CMS ready to
close 30 Jul 07 No Contingency Study
options to recover 2 months during YB0 cabling,
tracker insertion and beam pipe installation (EE
and pixels installed in 2008).
18
Commissioning For Physics

• 2006 year of installation and commissioning
  for computing, software and analysis procedures
• Cosmic Challenge in May/June
• Install new software computing for CSA06
• Integrated test (without online)
• Software Computing Commissioning
• phase 1 CSA2006
• phase 2 HLT work by end 2006
• Physics Commissioning
• phase 1 move to new SC start in April/May
• phase 2 Volume III
• phase 3 end-to-end tests in 2007
• Data from P5 to desktop (FEDs, cosmics,

19
Physics TDR Vol. III

• High-Level trigger
• Software (both the algorithms and steering)
• Timing (broken by trigger type also for
  ensemble)
• Trigger tables for
• Pilot run (43x43 1029-1031)
• Startup (936x936 75 ns 1032)
• 1033 (25 ns operation)
• Primary datasets
• Definitions
• Size estimates
• First definition of online streams
• Rest of Vol III
• Startup procedures, etc

20
Preparing for Physics
Startup - Pilot Physics Run cosmics, beam halo,
single beam-gas, pp collisions debug detector,
synchronization, calibration, alignment, s/w
checkout, reconstruction, work out object
reconstruction efficiencies from data, min
bias, jets, b production etc. 2008
re-discover SM ( b, W/Z, jets, ?, top, .) and
understand performance of CMS (W/Z production
predicted to few ), omnipresent backgrounds for
a large number of searches - need to be
understood in all detail Discover new physics
SUSY, BSM (look for new heavy objects) End-2008
Heavy Ion run Communication and collaboration
Organise the community at home Identify
small number of physics subjects or themes, each
with enough people to be competitive, incl young
RAs, students Identify their leaders, fold them
into CMS International (coordinated efforts)
21
Cross-Sections and Rates
Relative Rate MinBias
1 Jet (ETgt25 GeV) 10-2 b bar
10-3 ? Jet (ETgt20 GeV)
10-5 Jet (ETgt140 GeV) 10-6 W ? l?
10-8 Z ? l l
10-9 t tbar ? l? 10-10
22
Machine Startup I
23
Consequences for Startup

• Relative Rate
• MinBias 1
• Jet (ETgt25 GeV) 10-2
• b bar 10-3
• Jet (ETgt20 GeV) 10-5
• Jet (ETgt140 GeV) 10-6
• W ? l? 10-8
• Z ? l l 10-9
• t tbar ? l? 10-10

24
Machine Startup II
25
Machine Startup III
26
Creating Infrastructure for CMS Nerve Centre

• Build a Remote Control Room for CMS on Meyrin
  Site (CCAR)
• The lack of infrastructure at P5 (people)
• In the beginning, this will be the Remote
  Monitoring Room for CMS
• Initially Data Quality Monitoring High-Level
  Trigger
• Should/will run Offline shifts
• These will be really necessary to ensure
• That the data are processed correctly
• Short turn-around time in identifying problems
• That the actual Tier-0 production line is always
  full
• To monitor and follow up in general what the
  GRID is doing for CMS
• Tier-1 centers data distribution
• Above all, to operate the CAF
• Single most important element in the chain from
  P5 to the Tier0 output

27
Creating Infrastructure for CMS Nerve Centre

• (CCAR)
• In this case, this facility would be the CMS
  Operations Center/Room
• Like a portal to all things CMS
• The Trigger
• The Data
• The Grid
• Huge component the human aspect communication
• This will be the ideal place to cluster the CMS
  effort
• Really advantageous to have the experiment
  screens, and people monitoring the data-taking in
  the same area with the people processing the
  data/obtaining the calibration constants
• In association with a well equipped CAF enable a
  powerful analysis capability

28
CMS Computing Model
Nominal Size Tier-1 Tier-2 CPU
(kSI2000) 2500 900 Disk (TB) 1200 200 Tape
(TB) 2800 0
White Paper for May LHCC
29
SLHC Inner Tracking Pixels

• Pixels to much larger radius
• Technology and Pixel size vary with radius
• Not too large an extrapolation in sensor
  technology
• Cost/Geometry optimization
• BUT RD required for pixels lt 15 cm

Physics Potential and Experimental Challenges of
the LHC Luminosity Upgrade, Eds. F. Gianotti,
M.Mangano, T. S. Virdee, EPJ C39(2004)293
30
SLHC Level-1 Trigger

• RD Opportunities
• The Trigger/DAQ system of CMS will require an
  upgrade to cope with the higher occupancies and
  data rates at SLHC
• Will need an improved muon and calorimeter
  Level-1 trigger system
• A key issue - can we include some tracking in
  the Level 1 Trigger ?
• Change qualitatively and quantitatively physics
  retained
• There may not be enough rejection power using the
  muon and calorimeter triggers to handle the
  higher luminosity conditions at SLHC
• Using the studies for HLT applications gives an
  idea of what could be gained using elements of
  the tracker in the Level 1

31
Tracking Trigger

• Why not use the inner tracking devices in the
  trigger?
• Number of hits in tracking devices on each
  trigger is enormous
• Impossible to get all the data out in order to
  form a trigger inside
• How to correlate information internally in order
  to form segments?
• Possible topic for future RD
• Stacked pixels which can measure Pt of track
  segments locally
• Two layers about 1mm apart that could communicate

32
Upgrade Strategy

• Within 5 years of LHC start
• New layers within the volume of the current Pixel
  tracker which incorporate some tracking
  information for Level 1 Trigger
• Upgrade to full new tracker system by SLHC (8-10
  years from LHC Startup)
• Systems design right from the start (detectors,
  f.e., hybrids, optical links, power distribution,
  cooling, support structures,
• Includes full upgrade of trigger system

33
Discovery Physics
34
CMS Master Schedule
Magnet closed May 06 Magnet
test/cosmic challenge May-Aug 06 EB
installation Aug 06 SX5 USC ready for
crates April-May 06 UXC cable chains
installed April 06-Jun 06 HF lowering
July 06 YE/YB cable chains cabled June
06 YE3 lowering start Aug 06 UXC ready for
crates Jul 06 First connection to USC
Aug-Sep 06 YB0 lowering start Oct 06 EB-
installation Oct 06 SX5 May07 UXC Tracker
installation Jan-Feb 07 ECAL/Tracker
cabling complete Apr-May 07 Heavy lowering
complete Feb-Mar 07 Initial CMS ready to
close 30 Jul 07 No Contingency Study
options to recover 2 months during YB0 cabling,
tracker insertion and beam pipe installation. (EE
and pixels installed in 2008).
35
Conclusions

• CMS Construction is making good progress
• Towards MTCC, lowering and hardware commissioning
  in UXC, USC
• Commissioning for Physics
• Putting in place final software Software
  Readiness Reviews, CSA06 (T0/T1/T2..)
• Physics TDRs, Startup
• Exercise more and more complete systems (
  increased payloads)
• In 2007 FEDs ? Desktop, Cosmics data ? Desktop,
  Pilot Physics Run
• Physics
• 2008 onwards - first rediscover SM, then make
  discoveries ! Latter is what we built the
  detector for !
• Longer Term Future
• Completion of High Luminosity Detector, SLHC
  upgrades
• Initial CMS should be ready for collisions in
  2007
• Future will Surely be Exciting