ILC Detectors and their R

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• ILC Detectors and their RD
• GDE meeting Frascati

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Introduction

• Progress in various technologies and the ILC
  environment (low radiation doses, duty cycle, no
  hardware trigger) allows to conceive a quasi
  perfect and cost effective detector
• This goal however requires a WW dedicated and
  coordinated RD effort to identify priorities and
  to avoid duplications (the RD panel)
• For some important physics goals, improved
  performances translate into substantial gains in
  luminosity which amply justify this effort

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ACFA Study
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ECFA ILC Meeting in Vienna
ZHH
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(No Transcript)
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Energy reconstruction PFLOW

• Method already used at LEP/SLD which needs to be
  improved
• Combines tracking calorimetry
• Key issues
• - geometry (R and L) and magnetic field
• - tracking efficiency (pattern)
• - density granularity for the calorimeters
• Calorimetry/tracking resolutions are not critical
  since with ideal PFLOW resolution would be
  DE/E20/vE
• -gt degradation is due to confusion

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Where are we ?
Mark Thomson ECFA meeting in Vienna
35.80.3
Some Caveats Perfect tracking Z at rest
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HOW DOES PFLOW COMPARES TO STANDARD CALORIMETRY ?
complete law ?EJ a?vEJ ? b?EJ c
J.C. Brient Gandia
a b c (GeV)
ALEPH method QPFLOW 0.59 0 0.6
ATLAS 0.6 0.03 0
H1 0.5 0.05 0
PFLOW-ILC 0.3 0 0.5
AND the Angular Dependence !!
NIM A360 (1994),480
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Progress on ECAL

• Requirements for W-Si Calorimeter
• Large dynamic range (15 bits)
• Auto-trigger on MIP
• Low noise ltlt 1 MIP 40, 000 e-
• Hermeticity no room for electronics !
• Electronics inside the detector (ADC)
• ? miniaturisation
• ?Ultra-low power ltlt mW/ch
• Readout of more than 30 Million channels

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Tracking

• On top of efficiency one needs momentum accuracy
  to observe inclusively ZH (Z into leptons)
• This can be obtained with Si or SiTPC
• Note that TPC resolution with RO µmegas and
  GEM is improved / LEP and SLD

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results resolution vs Z
V. Lepeltier
Ar/iC4H1095/05_at_1T
s(mm)
Carleton Ottawa TPC p beam E80V/cm
preliminary
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Can we still improve ?

• There is continuous progress on µelectronics
• One can conceive much higher granularities
• using RO technologies used for pixels
• Examples ECAL and TPC
• Are they possible, are they useful ?

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K. Moenig
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Digital TPC
InGrid
J. Timmermans
Integrate GEM/Micromegas and pixel sensor
By wafer post processing
Hex / Pillars
4 wafer
19 different fields of 15 mm Ø 2 bonding pads /
fields
Hidden pillars No dead area
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Digital TPC
M. Hauschild
dE/dx _at_ 2.5 ???

• ...at the ILC...
• 100 GeV muon, B 4 T, TESLA-TDR gas, 100 cm drift

identical events same generated primary
clusters/electrons
Freiburg triple-GEM set-up
NIKHEF MicroMegas set-up
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Not discussed (and equally important)

• µvertex with very challenging issues for
• the minimum radius of the beam pipe and
• the occupancy of the 1st layer (MDI issue)
• Si layers with the hot debate on the actual
  material
• The forward region with the crossing angle
• issues
• LEP accuracy issues

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The Detector Concept Document

• In parallel to the RD activity we need to
  develop a global view of an ILC detector
• This is indispensable
• - To determine the geometry of a detector
• based on the physics performances requested
• - To understand the interface with the
  machine parameters
• - To evaluate the cost of an ILC detector
• This is been done by 3 (1) international
• groups will deliver outline documents at
  LCW06

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The 3 concepts

• Reasonably diversified approaches

GLD
SiD
LDC
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Some issues after Vienna

• Improve the software tools to evaluate detector
  performances
• -gt Few software workshops planned
• Improve our connection with machine
• experts (LEP, backgrounds, Xssing angle
• issues) MDI panel
• -gt Hope that the ECFA meeting in Oct-Nov
• 2006 will coincide with a GDE meeting

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Conclusions

• Very active ongoing effort on detectors and their
  RD (gt200 people in Vienna)
• Very substantial effort on RD ( with still
  unbalanced financing between regions)
• Crucial impact of the detector on the overall ILC
  performance (integrated luminosity figures)
• We think that connection Detector/Machine is
  essential