Report from WWS and charge to the workshop

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Report from WWS and charge to the workshop

• Hitoshi Yamamoto
• 3/3/05 KEK

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ILC Parameters
(http//www.fnal.gov/directorate/icfa/LC_parameter
s.pdf)

• 1st stage
• Energy 200?500 GeV
• 500 fb-1in first 4 years 500 fb-1in next 2
  years
• 2nd stage
• Energy upgrade to 1TeV
• 1000 fb-1in 3-4 years
• Options
• g g, ge-, e-e-, Giga-Z
• To start 2015
• 2IRs (probably)

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Technology choice done (ITRP)Things are
starting to roll...

• The name is officially decided to be ILC
  (International Linear Collider)
• GDE (Global Design Effort) - the first stage of
  GDI (Global Design Initiative) - is being formed

• First ILC workshop (Nov 13-15, KEK)
• Second ILC workshop at Snowmass (Aug 2005)

LC machine efforts are being re-organized around
the cold technology
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GDE structure
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Detector Timeline by WWS
(2004) ITRP tech. recommendation 3 panels (costing, detector RD, and MDI) being set up
(2005) Accelerator CDR Detector outline document submitted to WWS (proto-CDR) spring 2006
(2007) Accelerator TDR WWS receives CDR from each detector concept team
(2008) LC site selection Collaborations form and submit LOIs for proposal to the global lab
Site selection 1yr Global lab selects experiments.
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• RD panel
• 3 members from each region, balanced over
  expertise and region. Close to final selection.
• Register the detector RDs (incl. MDI)
• Evaluate them wrt detector concepts (document it
  Aug 2005)
• Coordinate with regional review processes
• MDI panel
• Liase with machine efforts (GDE)
• Existing LCWS leadership of MDI acts as this
• (Bambade, Woods, Tauchi)
• Costing panel
• Currently not materializing yet

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Detector Outline Document

• To be completed in Spring 2006 by each detector
  concept study group, and submitted to WWS
• Contents
• Description of the concept
• Performance estimate wrt physics benchmarks
• Required RDs and their status
• Rough costing estimate
• Could be called proto-CDR
• Real detector CDR not far away (in 2 years)

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Milestones of ILC (sugimoto)
2004
2005
2006
2007
2008
2009
2010
(Construction)
GDE (Design)
Technology Choice
Acc.
CDR
TDR
Start Global Lab.
Detector Outline Documents
CDRs
LOIs
Det.
Done!
WWS
Detector RD Panel
Collaboration Forming
RD Phase
Construction
Tevatron
SLAC B
HERA
LHC
T2K
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Workshops near future

• LCWS 2005, Stanford. 3/18-23/2005
• ACFA 8, DaeGu, Korea, 7/11-14/2005
• Snowmass (ALCPGWWS), 8/14-27/2005 (2 weeks)
• Held together with the ILC workshop
• ECFA 11/2005
• LCWS 2006, India 2 or 3/2006
• (Detector concept outline)

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Detector Performance Goals

• Vertexing, b,c tags ...
• 1/5 rbeampipe,1/30 pixel size wrt LHC
• Tracking, tagged Higgs ...
• 1/6 material, 1/10 resolution wrt LHC
• Jet energy (quark recon.) W,Z separation...
• 1/2 resolution wrt LHC

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Jet(quark) reconstruction
(Important mode if no Higgs is found)

• With , Z/W?jj can
  be reconstructed and separated

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Detector Concept Studies

• SiD - America
• Silicon tracker, 5T field, small
• SiW ECAL
• 2 leaders (Jaros, Weerts) Asian, European
  contacts
• Tesla-based - Europe, now called LDC
• TPC, 4T field, medium
• SiW ECAL
• 6 contact persons being selected (2 x 3regions)
• GLD - Asia
• TPC, 3T field, large
• W/Scintillator ECAL
• 6 contact persons being selected (2 x 3regions)

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• Overall jet energy resolution
• sjet2 sch2 sg2 snh2 sconfusion2
  sthreashold2
• Fine-grain ECAL and HCAL (digital?)
• Increase ECAL radius (Rin) to separate clusters
• Charged track separation ? B Rin2
• Neutral separation ? Rin

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GLD is smaller than CMS
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Basic parameters
SiD TESLA GLD
ECAL Rin (m) 1.27 1.68 2.1
ECAL BRin2 8.1 11.3 13.2
ECAL Type W/Si W/Si W/Scint
ECAL Rmeff (mm) 18 24.4 16.2
ECAL BRin2/Rmeff 448 462 817
ECAL X0 21 24 27
EH CAL l 5.5 5.2 6.0
EH CAL t (m) 1.18 1.3 1.4
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Issues

• Prove the concept with full simulation of actual
  jet reconstruction.
• Make the concept viable for LOI/Proposal
• Moderate B field ? larger rbeampipe
• Vertex resolution good enough?
• Cost of ECAL ?
• Use scintillator (SiPM readout)
• Will such TPC work?
• Endcap detector (large-scale GEM / MicroMEGAS)
• Long drift distance (diffusion?).
• Solution for vertexing still doest not exist.
• Large detector ? support design.

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Current GLD Detector Efforts

• Simulation
• KEK, Tohoku, Shinshu, Kobe
• Calorimeters
• Tsukuba, Shinshu, Kobe, Niigata
• TPC
• Saga, KEK, Tokyo NoKo, Kogakuin, Kinki etc.
• Vertexing
• KEK, Niigata, Tohoku
• DAQ
• Tsukuba, KEK
• Support
• KEK

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Full Simulator (GEANT4)

• Installation of GLD into a full simulator
  JUPITER is under way.
• Still early stage (tracking, clustering, etc.
  etc.)
• Critical for establishing the detector concept.

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ECAL
?Smaller tiles Sampling optimization SiPM
readout ! Shower max layer Scintillator strip
ECAL
Pb/Scint 4mm/1mm 4cmx4cm tile (5X5 tiles)x24
layers Fiber readout
Beamtest results ?(E) 16.3/vE?3.6
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SiPM

• (42mm)2 cell
• Limitted Geiger mode
• 1mm2 face
• Vbias50 V
• 5 Tesla field OK
• QE0.3
• Fast s50 ps
• Cheap (1/piece?)
• Noisy
• Quality control

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TPC Beamtest in B Field
Europe/Asia TPC collaboration (MPI, DESY, IPN
Orsay Asian institutions)

• JACCEE SC Solenoid
• 11.2 Tesla
• Lage volume
• MPI TPC
• Study Diffusions etc.

Long drift is probably OK(?)
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GEM Test
Pad response function (CERN GEM)
CERN GEM Biconial hole
xpad-xtrack
Fuchigami GEM needs to be tested. MicroMEGAS?
Fuchigami GEM Straight hole (Chemical etching)
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Vertexing Detector

• The long train (1ms) of cold machine
• large occupancy - need to readout within a train.
• Various options pursued worldwide (CPCCD, FAPS,
  ISIS...)
• Fine-Pixel CCD (FPCCD) proposed by Sugimoto.
• 5x5 ?m2 (usually 20x20 ?m2)
• Fully depleted to suppress diffusion ? same
  occupancy as before/reading for whole train.
• Read out in train gap (no need to readout during
  train).
• Needs an industrial partner. Multi-cell hits by
  bkg?

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Summary and charges

• After ILC technology decision, concrete detector
  design efforts are now starting worldwide - 3
  main concepts.
• We are pushing detector RD efforts
• around GLD which is to be a global effort,
• with/within horizontal international
  collaborations
• TPC collaboration (LCTPC), Calorimeter (CALICE),
  etc.
• Items particularly critical for GLD (Among many
  critical items)
• Low-cost and high performance ECAL
• Proof of concept by realistic simulations
• Jet energy resolution
• Vertex resolution
• ILC accelerator design needs inputs from
  physics/detector studies
• IR, crossing angle, options, physics benchmarks
  ...