tpc r&d for an ilc detector beijing tracking review
DESCRIPTION
TPC R&D for an ILC Detector Beijing Tracking Review. OUTLINE of TALK Overview LCTPC LCTPC Design Issues Performance Endplate Electronics Fieldcage Chamber gas Space charge Non-uniform fields Calibration Backgrounds R&D effort: introduction R&D topics: Dan Peterson - PowerPoint PPT PresentationTRANSCRIPT
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5 February 20075 February 2007 Ron Settles MPI-Munich/Desy Ron Settles MPI-Munich/Desy Beijing BILCW07 Tracking Review LC Beijing BILCW07 Tracking Review LCTPC Design, R&D Issues TPC Design, R&D Issues
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TPC R&D for an ILC TPC R&D for an ILC DetectorDetector
Beijing Tracking ReviewBeijing Tracking Review
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OUTLINE of TALKOUTLINE of TALK
1.1. Overview LCTPC Overview LCTPC 2.2. LCTPC Design Issues LCTPC Design Issues
• PerformancePerformance• EndplateEndplate• ElectronicsElectronics• FieldcageFieldcage• Chamber gasChamber gas• Space chargeSpace charge• Non-uniform fieldsNon-uniform fields• CalibrationCalibration• BackgroundsBackgrounds
3.3. R&D effort: introductionR&D effort: introduction• R&D topics: Dan PetersonR&D topics: Dan Peterson Madhu DixitMadhu Dixit Jan TimmermansJan Timmermans• Next R&D steps: Takeshi MatsudaNext R&D steps: Takeshi Matsuda
4.4. LCTPC CollaborationLCTPC Collaboration
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HISTORY
1992: First discussions on detectors in Garmisch-Partenkirschen (LC92). Silicon? Gas?1996-1997: TESLA Conceptual Design Report. Large wire TPC, 0.7Mchan.1/2001: TESLA Technical Design Report. Micropattern (GEM, Micromegas) as a baseline, 1.5Mchan.5/2001: Kick-off of Detector R&D11/2001: DESY PRC proposal. for TPC R&D(European & North American teams)2002: UCLC/LCRD proposals2004: After ITRP, WWS R&D panelEurope Chris Damerell (Rutherford Lab. UK) Jean-Claude Brient (Ecole Polytechnique, France) Wolfgang Lohmann (DESY-Zeuthen, Germany)
Asia HongJoo Kim (Korean National U.) Tohru Takeshita (Shinsu U., Japan) Yasuhiro Sugimoto (KEK, Japan)
North America Dean Karlen (U Victoria, CAN) Ray Frey (U. of Oregon, USA) Harry Weerts (Fermilab, USA)
GOALGOAL
To design and build an To design and build an ultra-high performance ultra-high performance
Time Projection Time Projection ChamberChamber
……as central tracker for as central tracker for the ILC detector,the ILC detector,
where excellent vertex, where excellent vertex, momentum andmomentum and
jet-energy precision jet-energy precision are requiredare required
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44GLD
LDC (old)
HCalECal
TPC
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LC-TPC Motivation/Goals …to be tested@the R&D where possible…
• continuous 3-D tracking, easy pattern recognition throughout large volume, well suited for large magnetic field
• ~99% tracking efficiency in presence of backgrounds
• time stamping to 2 ns together with inner silicon
• minimum of X_0 inside Ecal (<3% barrel, <30% endcaps)
• σ_pt ~ 100μm (rφ) and ~ 500μm (rz) @ 4T
• 2-track resolution <2mm (rφ) and <5-10mm (rz)
• dE/dx resolution <5% -> e/pi separation, for example
• easily maintainable if designed properly, in case of beam accidents, for example
• design for full precision/efficiency at 20 x estimated backgrounds
LC-TPC Motivation/Goals …to be tested@the R&D where possible…
• continuous 3-D tracking, easy pattern recognition throughout large volume, well suited for large magnetic field
• ~99% tracking efficiency in presence of backgrounds
• time stamping to 2 ns together with inner silicon
• minimum of X_0 inside Ecal (<3% barrel, <30% endcaps)
• σ_pt ~ 100μm (rφ) and ~ 500μm (rz) @ 4T
• 2-track resolution <2mm (rφ) and <5-10mm (rz)
• dE/dx resolution <5% -> e/pi separation, for example
• easily maintainable if designed properly, in case of beam accidents, for example
• design for full precision/efficiency at 20 x estimated backgrounds
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LCTPC/LP Groups (03Dec06) LCTPC/LP Groups (03Dec06) AmericasCarleton MontrealVictoriaCornellIndianaLBNL
Louisiana TechPurdue (observer)
EuropeEuropeLAL OrsayLAL Orsay IPN OrsayIPN Orsay
CEA SaclayCEA SaclayAachenAachenBonnBonnDESYDESY
U HamburgU HamburgFreiburgFreiburg
MPI-MunichMPI-MunichTU Munich TU Munich (observer)(observer)
RostockRostockSiegenSiegenNIKHEFNIKHEF
NovosibirskNovosibirskLundLundCERNCERN
AsiaAsiaTsinghuaTsinghua
CDC:CDC:HiroshimaHiroshima
KEKKEKKinki UKinki USaga Saga
KogakuinKogakuinTokyo UA&TTokyo UA&T
U TokyoU TokyoU TsukubaU Tsukuba
Minadano SU-IITMinadano SU-IIT Other groups
MITMITMIT (LCRD)MIT (LCRD)Temple/Wayne State (UCLC)Temple/Wayne State (UCLC)YaleYaleKarlsruheKarlsruheUMM KrakowUMM KrakowBucharest Bucharest
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-5
Large Detector Concept example
3x10-5
.30Particle Flow
Particle flow
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Physics determines Physics determines detector designdetector design
momentum: d(1/p) ~ 10-4/GeV(TPC only)
~ 0.4x10-4/GeV(w/vertex) (1/10xLEP)
e+e-ZHllX σdominated by beam-
beam, effects, backgrounds. Better momentum resolution not needed?
tracking efficiency: ~99% (overall) excellent and robust tracking efficiency by
combining vertex detector and TPC, each with excellent tracking efficiency
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Step through the design issues
described in the written report
Step through the design issues
described in the written report
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Performance, Resolution Performance, Resolution
w/ MPGD!
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Examples of Prototype TPCsExamples of Prototype TPCs
Carleton, Aachen, Cornell/Purdue,Desy(n.s.) for B=0or1T studies
Saclay, Victoria, Desy (fit in 2-5T magnets)
Karlsruhe, MPI/Asia, Aachen built test TPCs for magnets (not shown), other groups built small special-study chambers
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ElectronicsElectronics
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Fieldcage, Chamber gasFieldcage, Chamber gas
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Ion build-upIon build-up
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Ion backdrift, gatingIon backdrift, gating
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Field non-uniformityField non-uniformity
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Field non-uniformityField non-uniformity
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CalibrationCalibration
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RobustnessRobustness
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Jet Physics … it is easier to find Jet Physics … it is easier to find one in eone in e++ee--
Jet event in eecollision STAR Au+Au collision
Jim Thomas, Star TPC review Oct.2006
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R&D efforts
• gain experience with MPGD-TPCs, compare with wires
• study charge transfer properties, minimize ion feedback
• measure performance with different B fields and gases
• find ways to achieve the desired precision
• investigate Si-readout techniques
• start electronics design for > 1 million pads
• study design of thin field cage
• study design thin endplate: mechanics, electronics, cooling
• devise methods for robust performance in high backgrounds
• pursue software and simulation developments
R&D efforts
• gain experience with MPGD-TPCs, compare with wires
• study charge transfer properties, minimize ion feedback
• measure performance with different B fields and gases
• find ways to achieve the desired precision
• investigate Si-readout techniques
• start electronics design for > 1 million pads
• study design of thin field cage
• study design thin endplate: mechanics, electronics, cooling
• devise methods for robust performance in high backgrounds
• pursue software and simulation developments
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R&D PlanningR&D Planning• 1) Demonstration phase
– Continue work with small prototypes on mapping out parameter space, understanding resolution, etc, to prove feasibility of an MPGD TPC. For CMOS-based pixel TPC ideas this will include proof-of-principle tests.
• 2) Consolidation phase– Build and operate the Large Prototype (LP), Ø ~ 90cm,
drift ~ 60cm, with EUDET infrastructure as basis, to test manufacturing techniques for MPGD endplates, fieldcage and electronics. LP design is starting building and testing will take another ~ 3-4 years.
• 3) Design phase– During phase 2, the decision as to which endplate
technology to use for the LC TPC would be taken and final design started.
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What have we been doing in Phase 1 ?
What have we been doing in Phase 1 ?
Talks by
• Dan Peterson – MWPC, GEM, software
• Madhu Dixit – Micromegas, charge-dispersion anode foil, standard electronics
• Jan Timmermans – CMOS pixel work
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Examples of Prototype TPCsExamples of Prototype TPCs
Carleton, Aachen, Cornell/Purdue,Desy(n.s.) for B=0or1T studies
Saclay, Victoria, Desy (fit in 2-5T magnets)
Karlsruhe, MPI/Asia, Aachen built test TPCs for magnets (not shown), other groups built small special-study chambers
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FacilitiesFacilities Saclay 2T magnet, cosmics
Kek 1.2T, 4GeV
hadr.test-b
eam Desy 1T, 6GeV e- test-beam
Desy 5T
magnet,
cosmics, laser
Cern test-beam (not
shown)
EUDET
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TPC R&D summary to date
• Now > 4 years of MPGD experience gathered • Gas properties rather well understood• Limit of resolution understood• Resistive foil charge-spreading demonstrated• CMOS RO demonstrated• Work starting for the Large Prototype
TPC R&D summary to date
• Now > 4 years of MPGD experience gathered • Gas properties rather well understood• Limit of resolution understood• Resistive foil charge-spreading demonstrated• CMOS RO demonstrated• Work starting for the Large Prototype
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PerformancePerformance
Momentum precision needed for overall tracking?
– Momentum precision needed for the TPC? dE/dx resolution, Vº detection goals– Requirements for
• 2-track resolution (in rφ and z)? • track-gamma separation (in rφ and z)?
– Tolerance on the maximum endplate thickness?
– Tracking configuration• Calorimeter diameter • TPC • Other tracking detectors
– TPC OD/ID/length
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Physics determines Physics determines detector designdetector design
Overall momentum resolution: d(1/p) ~ ?????
e+e-ZHllX couplings. What else?
Concepts redoing study at s
= 230 GeV (for 120 GeV Higgs)…
STILL an ISSUE!
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B=3T,
σ~120μm
Astushi Yamaguchi, Keisuke Fujii @ ACFA 8 (Jupiter framework)
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PerformancePerformance
• Momentum precision for the TPC What is the best we can do? next talks
• dE/dx? A (very) few examples…
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10 examples, year 1992
Aleph ~ similar list… also: π/e separation for Ecal jet i.d. was extremely important
This dE/dx tool used effectively for S/N ehancement in >hundred papers for all of Lep1/Lep2 running for Opal and Aleph…
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What will we be doing in Phase 2 ?
What will we be doing in Phase 2 ?
Talk by
• Takeshi Matsuda – LP, SP, simulation
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Design Design
– Gas-amplification technology input from R&D projects
– Chamber gas candidates: crucial decision! – Electronics design: LP WP
• Standard-RO design • Is there an optimum pad size for momentum,
dE/dx resolution and electronics packaging? • Silicon RO: proof-of-principle
– Endplate design LP WP• Mechanics • Minimize thickness• Cooling
– Field cage design LP WP
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GLD
GLDAkira Sugiyama
GLDAkira Sugiyama
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Backgrounds/alignment/distortion-Backgrounds/alignment/distortion-
correctioncorrection
– Revisit expected backgrounds– Maximum positive-ion buildup tolerable– Maximum occupancy tolerable– Effect of positive-ion backdrift: gating plane
– Tools for correcting inhomogeneous B-field or space charge effects in heavy
backgrounds
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LCTPC Collaboration
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see Takeshi’s talk
LCTPC Collaboration
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EuropeLCTPC Collaboration
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LCTPC Collaboration
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TPC milestonesTPC milestones
2006-2010 Continue LCTPC R&D via small-prototypes
and LP tests
2010 Decide on all parameters
2011 Final design of the LCTPC
2016 Four years construction
2017 Commission/Install TPC in the LC Detector
2006-2010 Continue LCTPC R&D via small-prototypes
and LP tests
2010 Decide on all parameters
2011 Final design of the LCTPC
2016 Four years construction
2017 Commission/Install TPC in the LC Detector
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No conclusions…No conclusions…No conclusions…No conclusions…
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Keisuke Fujii