SLAC Detector R

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SLAC Detector RD Program
Progress and Plans for
Detector Systems
J. Jaros
DOE Review of HEP Laboratory Detector RD
July 9, 2009

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Detector Systems for Future HEP Experiments

• A Simulation and Reconstruction Toolkit
  Maintaining and building a versatile computing
  infrastructure to simulate experimental
  designs and evaluate performance
• Algorithms and Hardware for Particle Flow
  Calorimetry Developing Particle Flow
  Algorithms Developing PFA calorimeters
  Pushing the limits of precision in a PFA
  compatible tracker
• The Machine Detector Interface and Detector
  Integration Creating proof of principle
  designs for the interface between machine
  and detector Developing integrated designs,
  identifying key system RD needs
• Test Beams Support Necessary Machine and Detector
  RD Providing unique test beam capabilities
  for MDI and Beam Instrumentation studies with
  the full primary electron beam Establishing
  electron and hadron beams for detector RD with
  small spot sizes, exceptional electron
  purity, and sub-nanosecond timing properties

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SLACs Simulation/Reconstruction
ToolkitSim/Recon in sufficient detail for
realistic performance evaluation and real
algorithm development

• SLIC provides full detector simulation in Geant4
  - runtime detector description in XML -
  stdhep input - standard LCIO output
• org.lcsim reconstruction/analysis suite - XML
  detector geometry description - LCIO input and
  output - Java-based reconstruction analysis
  framework - AIDA histogramming and fitting -
  WIRED 3-D event display
• SLAC Sim/Recon is playing a critical role in new
  detector development - Linear Collider
  Detector Studies 100 M event MC samples
  for physics benchmarking and detector
  performance studies. Critical for the LC
  detector LoIs. - Atlas Upgrade Design
  studies - GLAST/Fermi beam tests - CLIC
  detector studies
• SLAC group encourages world-wide use of these
  tools, conducts tutorials, and helps establish
  international standards

Perfect for System Development easy to
define detectors easy to use works
on multiple OS
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Maintaining and Building SLAC Sim/Recon

• Planned upgrades - Expand user support and
  document new tool releases - Expand AIDA
  analysis support develop interoperability
  with ROOT - Improve LCIO (LC standardized IO)
  - Develop Standardized Detector Geometry
  descriptions - Add editing tools as JAS
  plugins - Improve plotting capability - Adapt
  code for parallel execution on multi-core CPUs
  (easy in Java!)
• Manpower needed 3 FTEs

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Particle Flow Calorimetry

• PFA Calorimetry promises superb jet energy
  resolution
• Tracker measures charged energy
• Calorimeters measure neutral energy
  afterexcluding energy from charged tracks
• High segmentation required!
• Assessing PFAs requires realistic
• calorimeter and tracker designs, full
• GEANT4 simulation optimized
• Particle Flow Algorithms
• PFA Plans
• Understand limitations and improve resolution
• Extend high energy performance
• Study jet energy resolution vs detector R, Z, B
• Package in modular, understandable code

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PFAs work in simulation
Results from Iowa/SLAC PFA approach LC goal of
?E/E 3-4Reconstruct W, Z, and top with
resolutions natural widths
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PFAs are needed for detector optimization
PFA response strongly influences choice of basic
detector parameters Radius, Length, B Field,
Depth and Segmentation of Hadronic Calorimeters
e.g., Jet energy Resolution (?E/E?/?E(GeV)) vs
Detector Length
M.
M. StanitzkiRAL
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Developing A Particle Flow EM CalorimeterSegmenta
tion, Segmentation, Segmentation
Kapton Cables (with UC Davis)
Pixel Sensor with KPiX (with U Oregon)
Mechanical Design (SLAC/Oregon/UC Davis)
1 mm readout gap ? 13 mm effective Moliere
radius. Very compact showers
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Plans for Ecal Development

• Bump-bond KPiX to Sensor
• Complete Readout chain with Kapton Cables
• Prototype and beam test 30-sensor tower
• Design and prototype full mechanical prototype to
  addressmechanical stability, alignment, thermal,
  and readout issues

Cutaway view of one(of twelve) Ecal
modules,showing readout cable
Heat removed at edges
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KPiX Readout for Hadronic Calorimeters
GEM Concept
30x 30 cm2 GEM Prototype
1cmx1cm cells

• Plans (with UT Arlington)
• Commission pad board and routing for KPiX readout
• Beam test GEM prototype
• Design 1m x 1m pad and routing for KPiX Readout
• Adapt designs to RPC readout

GEM
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Low Mass Si Tracker is part of the PFA
SystemHigh efficiency and good transparency
critical Physics also demands high precision

• Sensor Modules tile trackercylinders and endcaps
• Kapton cables route signalsand power
• Material lt1/6 LHC trackersPrecision gt3X LHC
  trackers

CF Rohrcell Cylinders
Sensor Module
Nested Endcaps
Design FNAL/SLAC
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Double Metal Sensor and ReadoutKPiX, double
metal sensor design, and power pulsingradically
reduce tracker material

• Readout chip is bump bonded directly to the
  strip sensor

Hamamatsu Prototypes under test

• All traces are routed to KPIX chips on the
  sensor with a second metal layer

• Power, ground, clock, and data signals are
  brought to the sensor on a kapton cable

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Full tracking simulation is needed to assess
performance and optimize design

• Realistic detector modeling and digitization
  Planar polyhedra geometryaccurate detail
  Virtual segmentation for cylindrical description
  Complete simulation of charge deposition in
  vertex pixels and strips Charge depositions
  are clustered to make tracker hits
• Dedicated track finding algorithms Seed-based
  Stand-Alone Tracking Vertex seeded tracking
  Calorimeter seeded tracking

efficiency vs pt
?p/p vs p
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Plans for Low-Mass Tracking

• Sensor Development - Develop and test double
  metal sensors - Bump-bond KPiX to sensors and
  beam test - Test sensors and readout at 5T
• Develop low-mass, low-impulse power delivery
  system
• Mechanics/alignment - Develop sensor modules
  - Evaluate, mitigate vibrations induced by power
  pulsing
• Simulation - Implement full geometry/full
  digitization - Evaluate tracker Upgrade
  options for ATLAS - Optimize LC tracker design

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Machine Detector Interfaces

• Vibrations and alignment - Future colliders
  will have transverse beam sizes
  approaching nanometer scales. - Final lenses
  must stay aligned at this level - Last quad is
  supported by the detector - May require optical
  interferometry linking both ends of
  detector - Beam-based feedback does final
  alignment
• Detector Motion Systems - Allow access to
  service inner detector - Move detector on and
  off beamline Push pull ? move whole
  detector with minimal disconnection of
  utilities position detector to ? 1 mm.

Final Quad in Detector
Cryo Systems for Push Pull
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Detector Integration
Technical Design adds real world constraints,
demonstrates engineeringfeasibility, provides
realism in simulations, and points toward needed
RD
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MDI and Detector Integration Plans

• MDI - Develop quantitative analytical and FEA
  models of vibration transfer functions to
  final lens - Measure vibrations in existing
  structures - Develop models for lens support
  and alignment - Evaluate schemes for push-pull
  (platforms vs rollers) - Develop radiation
  shielding plans, accounting for cable and
  utility paths to inner detectors.
• Detector Integration - Develop support
  techniques for inner detectors that preserve
  alignment, minimize wasted space, and
  facilitate assembly - Develop cable and
  utility paths that support self shielding -
  Develop alignment strategies, e.g. geodetic grids
  of FSIs.

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End Station Test Beam (ESTB) Proposal Provides
Test Beams for MDI and Detector RD

• Linear Collider MDI and Beam Instrumentation
  studies need high energy primary electron beams
  - Energy Spectrometer Development - Wakefield
  studies - LC Forward Cal and Pairs monitor
  tests
• Full beam calibrations of Part Astro Detectors
  - Anita and FLASH used SLAC primary beam for
  calibrations - Next? Aegis?
• More Secondary Beams are useful for detector RD,
  and essential for calibrating and testing full
  prototypes and production modules - LHC
  Upgrade - Super B - LC Detector

Unique at ESTB
Unique at ESTB
Unique Features at ESTB ultra-clean
electrons mm spot sizes sub-nanosecond
trigger timing
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ESA Test Beam Provides Electrons/Hadronsup to
13.6 GeV, from single particles to full beam
intensity
Kick 13.6 GeV LCLS beam to ESA 5 Hz, 2 x 109
e-/ pulse primary beam Clean secondary
electrons/positrons plt13.6 GeV, 0.1/pulse to 2
x 109 e-/pulse Secondary hadrons 1 ? / pulse lt
12 GeV/c
Secondary Particle Yields


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Staged Proposal

• Stage I Primary and secondary electrons -
  Construct kicker magnets and vacuum chamber for
  BSY - Update PPS System and install new beam
  dump for ESA - Update MPS and Controls as
  needed - Schedule Ideally install early 2010,
  maybe 2011
• Stage II secondary hadrons - Add Be target,
  beam dump, analyzing magnet, and quads -
  Schedule Ideally, install A-line items early
  2010 during LCLS down ESA items can be
  installed later, dont interfere with LCLS

Hadron Production
Modify LCLS Kicker Magnets for BSY
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Test Beam Plans

• ESTB Proposal July 2009
• Design and Construction FY10
• CostsStage I PPS
  1.5M (fully loaded)Stage II
  0.7M Operations
  0.4M/yearThis is small
  investment puts an existing high energy electron
  accelerator to work for HEP.
• Beams 2011
  

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Detector Systems Conclusions

• Sim/Recon Toolkit supports SiD, Atlas Upgrade,
  GLAST/Fermi and more Plans Expand support to
  make useful to CLIC, Super B, SiD
• Particle Flow Calorimetry Development integrates
  algorithm development, calorimeter RD, and
  tracker RD Plans Perfect algorithms, test
  Ecal, develop Hcal readout, test tracker
  sensor and alignment/stability schemes for
  tracker
• Machine Detector Interface and Detector
  Integration Plans Establish vibration
  standards for final quads, converge on push-
  pull scheme, complete detector
  integration with realistic
  subsystem designs
• Test Beam at SLAC Plans Provide test beam
  capability with ESTB Proposal

SLAC DOE HEP Review July 7-9, 2008
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Major Milestones

• Task
  Date Expected
• Sim/Recon LCIO v2 implementation integrated into
  org.lcsim
  Q4 2010
• Test many-core implementation
  of org.lcsim
  Q2 2011
• PFA Extend PFA performance to 3 TeV
  
  Q2 2011
• Develop PFA parameterizations
  of resolution vs minimum R and Z,
  absorber depth, pixel size, absorber material,
  and detector technology Q4 2011
• PFA Ecal Electromagnetic calorimeter beam test
  
  Q2 2011
• Complete electromagnetic
  calorimeter construction prototype
  Q3 2010
• PFA Track Evaluate noise performance of double
  metal silicon sensors bump-bonded to
  KPiX
  Q3
  2010
• Evaluate sensor/readout
  performance in high magnetic fields
  Q4 2010
• Evaluate effects of power
  pulsing in high magnetic fields
  Q2 2011
• MDI Complete vibration analysis for
  platforms and lens support
  Q4 2010
• Push-pull strategy decision
  
  Q4 2011
• Test Beam Implement SLAC test beam facility
  
  Q4 2010