ILC Detector

June 7, 2006 SLAC DOE Review 1

ILC Detector

ILCILC DetectorDetectorSilicon Detector Detector for for ILC

SLAC DOE Program Review June 7, 2006 John Jaros


Why ILC Detector R&D?Why now?

• ILC detector requirements exceed the state of the art, and the ILC environment necessitates major advances in detector technology. Advances take time.

• GDE Timeline has ILC machine TDR by 2009. Detectors are way behind. Need to catch up.

• US dangerously lags Europe in ILC detector R&D and physics studies, risking a 2nd class role in ILC experiments. Time to fix.

• EPP2010 Action Item 2: Achieving Readiness for the ILC

“The United States should launch a major program of R&D, design, industrialization, and financing studies of the ILC accelerator and detectors. “

They mean Now.


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ILC Detector Requirements for Calorimetry

Higgs MassMeasurement

•Good ResolutionGood Resolution Lowers Errors/ Lowers Errors/ Boosts EffectiveBoosts Effective Luminosity Luminosity•Extends PhysicsExtends Physics Reach (e.g. Reach (e.g. HHHHHH))

Goal is 30%/ √E. State of the art was 60%/Goal is 30%/ √E. State of the art was 60%/√E at LEP√E at LEP


VXD Must Handle ILC Pair BackgroundPerformance Goal = 5 10/psin3/2 [m]>>State of the art.

• Environmental Challenge: Reading out a pixel VXD fast enough to avoid being swamped by pairs background from 3000 bunch crossings. No proof of principle exists.

Precision Measurement of Higgs BranchingFractions •Fundamental test Fundamental test of Higgs Couplings of Higgs Couplings to Fermion Mass & to Fermion Mass & Gauge Bosons Gauge Bosons•Distinguishes SM,Distinguishes SM, MSSM, 2HD,… MSSM, 2HD,…

International Linear Collider

Timeline 2005 2006 2007 2008 2009 2010

Global Design Effort Project

Baseline configuration

Reference Design

ILC R&D Program

Technical Design

Expression of Interest to Host

International Mgmt

Detector Outline Documents/ ~Costs Needed

Detector Designs/Proofs of Principle/Costs NeededDetector Designs/Proofs of Principle/Costs Needed

……pushes detector development hardpushes detector development hard

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US Lags in Detector R&DReport from the WWS R&D (Damerell) Panel

Resources: manpower by region Resources: equipment funds by region

Caveat: From a survey of existing projects only! Caveat: From a survey of existing projects only!


SLAC’s Role in ILC Detector Development • Coordinates the SiD Design Study with Fermilab, BNL, Argonne, many US Universities, and international partners from KEK, Tokyo, Annecy, and Oxford

•Designs and studies the Machine- Detector interface and IP Instrumentation

•Provides Computing-Simulation- Analysis infrastructure for the US ILC Detector Effort

•Pursues detector R&D, especially Si/W Calorimetry, Readout electronics, and Si Tracking

•Optimizes and Benchmarks SiD performance

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Silicon Detector Design Study

Design an ILC detector, aggressive in performance, constrained in costIdentify and develop needed detector R&DEngage an international community of physicists interested in the ILC

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SiD DESIGN STUDY COORDINATORSJ.Jaros, H.Weerts, H.Aihara & J.Karyotakis

SILICON TRACKERM.DemarteauR.Partridge

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EXECUTIVE COMMITTEEH.Aihara, J.Brau, M.Breidenbach, J.Jaros,

J.Karyotakis, H.Weerts & A.White

SOLENOIDFLUX RETR.Smith

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VERY FORWARDB. Morse

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SIMULATIONN.Graf

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MDIP.BurrowsT.Tauchi

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VERTEXINGSu Dong

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CALORIMETERSR.Frey

J.Repond

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MUONH.BandH.E.Fisk

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BENCHMARKINGT.Barklow

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COSTM.Breidenbach

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R& D COORDINATORA. White

ADVISORY COMMITTEEAll names on this chart

SLAC ParticipantsSLAC Participants

International ParticipantsInternational Participants Initiated at Victoria ALCPG 04


• Jet energy resolution goal is 30%/E. Choose a dense, highly segmented, SiW Ecal and Hcal.

• High magnetic field limits radius and cost of calorimeters and solenoid and maintains BR2. B = 5 Tesla

• Si strip tracker for excellent momentum resolution and robust performance pt/pt

2 ≤ 5 x 10-5 GeV-1

• VX Tracker at minimum possible radius with max Ω = 5 10/psin3/2 m

• Instrumented flux return for muon identification

SiD Design Rationale


SiD Starting Point• 5 layer pixel VXT • 5 layer Si tracker with

endcaps• Si/W Ecal and Hcal inside

the coil• 5T Solenoid• Instrumented flux return for

muon detection

Compact: 12m x 12m x 12 m

SiD is moving beyond the starting point, with subsystem SiD is moving beyond the starting point, with subsystem designs, full G4 subsystem descriptions, pattern recognition designs, full G4 subsystem descriptions, pattern recognition and PFA code development, and benchmarking studies.and PFA code development, and benchmarking studies.


Silicon Detector Outline DocumentCaptures Current SiD Status See http://www-sid.slac.stanford.edu/


SiD DOD Authors from Asia, Europe, US SiD DOD Authors from Asia, Europe, US


Expert Group at SLAC/BNL/Oxford crosses machine/detector boundary SiD ILC Takashi Maruyama Ray Arnold Ken Moffeit Lew Keller Mike Woods Tom Markiewicz Phil Burrows (Oxford) Andrei Seryi + Brett Parker (BNL) + others

Principal Accomplishments• Evaluate Detector backgrounds for new ILC parameters• Design IRs for 2, 14, 20 mr crossing angles • Design/test beam energy spectrometers (with U Oregon and Notre Dame)• Investigate EMI (electro-magnetic interference) and beam rf effects• Design beamlines to accommodate polarimetry, energy spectrometers

ILC Machine-Detector Interface GroupILC Machine-Detector Interface Group

SiD IR Hall LayoutSiD IR Hall Layout Crossing Angle DesignsCrossing Angle Designs Final SC Quads (BNL)Final SC Quads (BNL)


See Mike Wood’s TalkSee Mike Wood’s Talkin Breakout Sessionin Breakout Session

Mike Woods’ Talk in Mike Woods’ Talk in Breakout Session Breakout Session

ILC-ESA Beam Tests April 24 – May 8, 2006

~40 participants from 15 institutions in the UK, U.S., Germany and Japan: Birmingham, Cambridge, Daresbury, DESY, Fermilab, KEK, Lancaster, LLNL, Notre Dame, Oxford, Royal Holloway, SLAC, UC Berkeley, UC London, U. of Oregon

1. Energy spectrometer prototypes • T-474 BPM spectrometer: M. Hildreth (Notre Dame), S. Boogert (Royal Holloway and KEK) are co-PIs • T-475 Synch Stripe spect.: Eric Torrence (U. Oregon) is PI

2. Collimator wakefield studies • T-480: S. Molloy (SLAC), N. Watson (Birmingham U.) co-PIs

3. Linac BPM prototype • BPM triplet – C. Adolphsen, G. Bowden, Z. Li

4. Bunch Length diagnostics for ESA and LCLS • S. Walston (LLNL) and J. Frisch, D. McCormick, M. Ross (SLAC)

5. EMI Studies • G. Bower (SLAC) + US-Japan collaboration with Y. Sugimoto (KEK)

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Detector Simulation/Reconstruction Group

• Supports SiD, ALCPG, and international simulation effort. Tutorials, Workshops, Snowmass Resource CD

• Provides physics simulation and data samples for physics analysis e.g. 1 ab-1 sample of all SM Processes at 500 GeV http://www.lcsim.org/datasets/ftp.html

• Provides full detector simulation in Geant4. Runtime detector description in XML, making it easy to study design variations.

• Provides Java-based reconstruction & analysis framework• Developing Tracking and Calorimeter reconstruction code

SLAC Sim/Recon Group Ron Cassel Norman Graf* Tony Johnson Jeremy McCormick

http://www.lcsim.org/datasets/ftp.html

http://www.lcsim.org/datasets/ftp.html


Calorimetry drives the SiD Design, and Particle Flow drives the Calorimetry

1Measure the energy of every particle, not the energy deposited in

calorimeter modules.

High transverse and longitudinal segmentation is needed to distinguish

individual particles.


Starting Detector Comparisons with PFAsStarting Detector Comparisons with PFAs

SiD SS/RPC - 5 T field SiD SS/RPC - 4 T field

3.63 GeV 89.3 GeV 63%-> 38%/sqrt(E)

3.78 GeV 89.2 GeV 54%-> 40%/sqrt(E)

-> Somewhat worse performance in smaller field

Vary B-field


SiD Detector R&D at SLACSLAC Participants Collaborators

T. Barklow W. Cooper (FNAL) M. Breidenbach M. Demarteau (FNAL) D. Freytag R. Frey (Oregon) R. Herbst V. Radeka (BNL) J. Jaros N. Sinev (Oregon) D. Su D. Strom (Oregon) T. Nelson +Annecy and UC Davis

Major Activities are closely integrated with FNAL, BNL, Oregon, Annecy

• Front-end electronics design for Si/W ECAL• Ecal mechanical design• Tracker mechanical design• Si sensor development for tracker• Pattern Recognition Code and Detector Simulation for Tracker• VXD Concept, Simulation, and Performance• Physics Analysis and Detector Benchmarking • Costing Tools


SiD ECAL overview

CAD overview

R 1.27 m

• 20 layers x 2.5 mm thick W

10 layers x 5 mm thick W

• ~ 1mm Si detector gaps

• Preserve Tungsten RM eff= 12mm

• Highly segmented Si pads 12 mm2


Conceptual design• Very aggressive mechanical and electronics integration is needed to preserve the

Moliere radius

FEA analysis is in progress

• W plates joined by ‘rods’

• Wafers ‘on’ W

• ReadOut chips on wafers

W plate ~ 200 Kg

Module ~7000 Kg

SLAC/ AnnecySLAC/ Annecy


Wafers and R/O• Single MIP tagging (S/N ~7)

• Dynamic range 0.1 – 2500 MIPs

• Bump bonded to the detector

• Low power <40 mW per wafer with power pulsing, passive cooling

• 4 deep buffer for bunch train

SLAC/BNL/Oregon/DavisSLAC/BNL/Oregon/Davis


KPiX SiD Readout Chip

2x16 Calorimetry

2 x 16 Si Strip

One cell. Dual range, time measuring, 13 bit, quad buffered

Prototype: 2x32 cells: full: 32x32

2 x 32 Prototype #2 now being tested at SLAC. #3 is on the way. Full chip in the fall.

Use for ecal and µstrips; adapt for hcal.

See Marty’s talkSee Marty’s talkin Breakoutin Breakout


SiD Integrated Tracking

• Silicon Tracker is fast (1 BX only)

• Silicon is robust(No HV trips)

• Tracking System VXD Si Main Tracker Ecal

Pixel Vertex Tracker VXT

SLAC Conceptual Designand Simulation

• 5 layer |cos| < 0.976

• Pattern Recognition ~100%

FNAL Mech DesignFNAL Mech Design


Promising VXT Technology

““Chronopix” being developed by Oregon/Yale/Sarnoff

•Store hit times in Macro Pixelduring bunch train, readout after

•Scrap Macro/micro. Miniaturize Macro instead.

•MacroPixel design complete; prototype detector design next.

Good opportunity for SLAC involvement


Si Tracker @ SLACStand Alone Barrel Tracking Sensor Module Design

Microstrip Detector DesignMicrostrip Detector Designand Integration with KPiXand Integration with KPiX

Tracking Efficiency vs Pt (GeV/c)Tracking Efficiency vs Pt (GeV/c)

See talk by Tim NelsonSee talk by Tim Nelson in Breakout Session in Breakout Session

What are the tradeoffs between detector performance and physics performance? What detector performance is really needed?

Processes under study by T. Barklow• Jet Resolution

Higgs Mass Error vs Ejet

Higgs Self Coupling Error vs Ejet

• Tracker Momentum Resolution Higgs Mass Error vs pt/pt

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Ecm Accuracy vs pt/pt2

SUSY Mass Error vs pt/pt2

• Detector Calibration Runs Run at the Z or will radiative Z’s do?

These studies benchmark SiD performance. Eventually they will be utilized to compare and optimize SiD Design variations.

Detector Performance Requirements


What’s Next for SiD@SLAC...?

….ambitious plans!

• Ecal KPiX, New Si Sensors, Prototype, Beam Test, Mechanical design

• Main Tracker Tracker Si Sensor, Prototype Sensor Modules, Beam test

• Vertex Tracker Evaluate Performance, Mechanical Design (with FNAL), Develop Sensor

• Reconstruction Code Perfect PFA, Tracking Pat Rec

• Benchmarking/Analysis/Design Optimization Detector Performance Requirements, New Physics Analyses, Global Optimization, Subsystem Optimization.

Expanding Effort on SiDPresent program is not adequately staffed or funded to realize our ambitiousplans, meet the GDE timeline, or secure a leading role for the US community.

Initial startup of SLAC/Atlas effort presents challenges for SiD effort.

• New SiD Personnel are needed for design and optimizationMechanical engineer, mechanical technician, computer support, postdoctoral researchers, simulation physicist, visitors

• New SiD Si Lab Space is needed & tentatively identified KPiX development, Sensor development

• Additional SiD M&S is needed to support proof of principle R&D.

SLAC is a natural site to lead ILC detector development with our user community.

We have much of the needed engineering, construction facilities, computing and simulation infrastructure, and test beams, and can serve as a center for design and analysis activity.


Backup Slides


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ILC Detector Requirement for Tracking

Higgs Tag and Recoil Mass Measurement

•Boost EffectiveBoost Effective Luminosity Luminosity• Improve TagImprove Tag

Goal: pt/pt2 ≤ 5 x 10-5 GeV-1 10X LEP, and 3X CMS10X LEP, and 3X CMS


Accounting for Costs

BR^2 Fixed, Vary R_Trkr

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Cost by subsystem

Cost minimum vs. tracker

radiusMarty’s Excel Spreadsheet allows study of costs vs detector parameters, includes fixed costs. Need for detector optimization.

ILC Detector

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