27/11/2006 27/11/2006 Ron Settles MPI-Munich Ron Settles MPI-Munich Tsinghua Nov 2006 -- LCTPC Des Tsinghua Nov 2006 -- LCTPC Des ign Issues: R&D Planning ign Issues: R&D Planning 1 Issues for the LCTPC Issues for the LCTPC design and their feedback design and their feedback to the R&D program to the R&D program OUTLINE of TALK OUTLINE of TALK • Overview Overview • LCTPC Design Issues in the DODs LCTPC Design Issues in the DODs • Next steps: Next steps: • More work with Small Prototypes More work with Small Prototypes (SP) (SP) • Build the Large Prototype (LP) Build the Large Prototype (LP) • LCTPC LCTPC R&D plans R&D plans
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Issues for the LCTPC design and their feedback to the R&D program
Issues for the LCTPC design and their feedback to the R&D program. OUTLINE of TALK Overview LCTPC Design Issues in the DODs Next steps: More work with Small Prototypes (SP) Build the Large Prototype (LP) LCTPC R&D plans. LDC/GLD/4th Concepts or A TPC for a Linear Collider Detector. - PowerPoint PPT Presentation
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27/11/200627/11/2006 Ron Settles MPI-Munich TsinghuRon Settles MPI-Munich Tsinghua Nov 2006 -- LCTPC Design Issues: R&D Pa Nov 2006 -- LCTPC Design Issues: R&D Planninglanning
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Issues for the LCTPC Issues for the LCTPC design and their feedback design and their feedback
to the R&D programto the R&D program
OUTLINE of TALKOUTLINE of TALK
•Overview Overview •LCTPC Design Issues in the DODsLCTPC Design Issues in the DODs•Next steps:Next steps:
•More work with Small Prototypes (SP) More work with Small Prototypes (SP) •Build the Large Prototype (LP) Build the Large Prototype (LP)
•LCTPC LCTPC R&D plans R&D plans
OUTLINE of TALKOUTLINE of TALK
•Overview Overview •LCTPC Design Issues in the DODsLCTPC Design Issues in the DODs•Next steps:Next steps:
•More work with Small Prototypes (SP) More work with Small Prototypes (SP) •Build the Large Prototype (LP) Build the Large Prototype (LP)
•LCTPC LCTPC R&D plans R&D plans
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LDC/GLD/4th Conceptsor
A TPC for a Linear Collider Detector
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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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e.g.with precision measurements of theHiggs
e.g.with precision measurements of theHiggs
cmE recHM Expt (GeV) Decay
Channel (GeV/c2) ln(1+s/b)
115 GeV/c2
1 ALEPH 206.7 4-jet 114.3 1.73
2 ALEPH 206.7 4-jet 112.9 1.21
3 ALEPH 206.5 4-jet 110.0 0.64
4 L3 206.4 E-miss 115.0 0.53
5 OPAL 206.6 4-jet 110.7 0.53
6 Delphi 206.7 4-jet 114.3 0.49
7 ALEPH 205.0 Lept 118.1 0.47
8 ALEPH 208.1 Tau 115.4 0.41
9 ALEPH 206.5 4-jet 114.5 0.40
10 OPAL 205.4 4-jet 112.6 0.40
Goal: to revisit the Higgs…Goal: to revisit the Higgs…
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-5
Large Detector Concept example
3x10-5
.30Particle Flow
(N.B. below are TDR dimensions, which have changed for latest LDC iteration)
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66GLD
LDC
HCalECal
TPC
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dominated by beamstrahlungdominated by beamstrahlung
tracking efficiency: 99% (overalltracking efficiency: 99% (overall) ) excellent and robust tracking efficiency by excellent and robust tracking efficiency by
combining vertex detector and TPC, each combining vertex detector and TPC, each with excellent tracking efficiencywith excellent tracking efficiency
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Redo study at Redo study at s = 220 GeVs = 220 GeV and using vertex and using vertex
constraint!constraint!
BIG IS
SUE!
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LCTPC/LP Groups (19Sept06)LCTPC/LP Groups (19Sept06) AmericasAmericasCarleton Carleton MontrealMontrealVictoriaVictoriaCornellCornellIndianaIndianaLBNLLBNL
Purdue (observer) Purdue (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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R&D PlanningR&D Planning1) Demonstration phase1) Demonstration phase– Continue work with small prototypes on mapping out Continue work with small prototypes on mapping out
parameter space, understanding resolution, etc, to prove parameter space, understanding resolution, etc, to prove feasibility of an MPGD TPC. For CMOS-based pixel TPC feasibility of an MPGD TPC. For CMOS-based pixel TPC ideas this will include proof-of-principle tests.ideas this will include proof-of-principle tests.
2) Consolidation phase2) Consolidation phase– Build and operate the Large Prototype (LP), Ø ~ 80cm, Build and operate the Large Prototype (LP), Ø ~ 80cm,
drift ~ 60cm, with EUDET infrastructure as basis, to test drift ~ 60cm, with EUDET infrastructure as basis, to test manufacturing techniques for MPGD endplates, fieldcage manufacturing techniques for MPGD endplates, fieldcage and electronics. LP design is starting and electronics. LP design is starting building and building and testing will take another ~ 3-4 years.testing will take another ~ 3-4 years.
3) Design phase3) Design phase– During phase 2, the decision as to which endplate During phase 2, the decision as to which endplate
technology to use for the LC TPC would be taken and final technology to use for the LC TPC would be taken and final design started.design started.
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What have we been doing in Phase 1 ?
What have we been doing in Phase 1 ?
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GEM: Two copper foils separated by kapton, multiplication takes place in holes, uses 2 or 3 stages
Micromegas: micromesh sustained by 50μm pillars, multiplication between anode and mesh, one stage
S1
S1/S2 ~ Eamplif / Edrift
P~140 μm
D~60 μm
S2
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Pixel TPC Pixel TPC DevelopmeDevelopme
ntnt
NikhefFreiburg
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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 being 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 being understood• Resistive foil charge-spreading demonstrated• CMOS RO demonstrated• Work starting for the Large Prototype
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Phase 2• Basic Idea: LP should be a prototype LP should be a prototype for the LC TPC design and test as many for the LC TPC design and test as many of the issues as possible (like, e.g., of the issues as possible (like, e.g., TPC90 @ Aleph). This will take at least 2 TPC90 @ Aleph). This will take at least 2 iterations, we call them LP1 and LP2.iterations, we call them LP1 and LP2.
• The Eudet infrastructure gives us a The Eudet infrastructure gives us a starting basis for the LP workstarting basis for the LP work
• The general LCTPC/LP R&D issues and The general LCTPC/LP R&D issues and been divided up into workpackages (WP) been divided up into workpackages (WP) more later…more later…
Phase 2• Basic Idea: LP should be a prototype LP should be a prototype for the LC TPC design and test as many for the LC TPC design and test as many of the issues as possible (like, e.g., of the issues as possible (like, e.g., TPC90 @ Aleph). This will take at least 2 TPC90 @ Aleph). This will take at least 2 iterations, we call them LP1 and LP2.iterations, we call them LP1 and LP2.
• The Eudet infrastructure gives us a The Eudet infrastructure gives us a starting basis for the LP workstarting basis for the LP work
• The general LCTPC/LP R&D issues and The general LCTPC/LP R&D issues and been divided up into workpackages (WP) been divided up into workpackages (WP) more later…more later…
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PerformancePerformance
– Momentum precision needed for overall Momentum precision needed for overall tracking? tracking?
– Momentum precision needed for the TPC? Momentum precision needed for the TPC? – Good dE/dx resolution, Vº detectionGood dE/dx resolution, Vº detection– Requirements forRequirements for
2-track resolution (in r2-track resolution (in rφφ and z)? and z)? track-gamma separation (in rtrack-gamma separation (in rφφ and z)? and z)?
– Tolerance on the maximum endplate Tolerance on the maximum endplate thickness? thickness?
– Tracking configurationTracking configurationCalorimeter diameter Calorimeter diameter TPC TPC Other tracking detectors Other tracking detectors
– TPC OD/ID/length TPC OD/ID/length
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LCTPC resolution in the DODsLCTPC resolution in the DODsLCTPC resolution in the DODsLCTPC resolution in the DODs
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ACFA8--July2005
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PerformancePerformance
– Momentum precision needed for Momentum precision needed for the TPCthe TPC
– What is the best we can do?What is the best we can do?
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Keisuke Fujii, PRC report
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GLD
GLDAkira Sugiyama
GLDAkira Sugiyama
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Arrangements of detectors on the active area of the end cap (2/2)Trapezoidal shapes assembled in iris shape
Annotations: Px is the type number of PADS boards or frames
Page 2
By rotation of 15° around the axe, these frames are the same
P1
12 sectors (30° each) as super modules are defined
On each, 7 modules are fixedThe sizes of detectors are varying from 180 to 420 mm
P2 P3 P4
P2
P3
P4
These arrangement seems to be the best as only 4 different PADS are necessary
LDCRS/Joel Pouthas/Philippe Rosier
LDCRS/Joel Pouthas/Philippe Rosier
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Aleph endplateAleph endplate
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Some features• Zigzag structure prevented loss of tracks > θ~22°• Sectors mounted from inside using a “handling tool” to minimize the dead space between sectors. This straight-forward operation which was performed at least 30 times during the lifetime of Aleph. • Alu sandwich structure stiff, lightweight to
- contain 7mb overpressure- provide forced-air thermal insulation between electronics and TPC volume
• Water cooling of 1kW electronics/side in addition- 22K channels per side
• Combination water/air cooling blocked all heat to TPC• Overall thickness ~ 25%Xo (average) w/o cables• Bending of endplate
- 20 micrometers due to 7mb overpressure- 5 micrometers due to wire tension
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Design Design
– Gas-amplification technology Gas-amplification technology input from input from R&D projects R&D projects
– Chamber gas candidates: crucial decision! Chamber gas candidates: crucial decision! – Electronics design: Electronics design: LP WPLP WP
Zeroth-order “conventional-RO” design Zeroth-order “conventional-RO” design Is there an optimum pad size for momentum, Is there an optimum pad size for momentum, dE/dx resolution and electronics packaging? dE/dx resolution and electronics packaging? Silicon RO: proof-of-principle Silicon RO: proof-of-principle
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This is for infrastructure for detector R&D, but not yet the R&D itself, to which all of the TPC R&D groups will have to
contribute if the LP is going to be successful.
This will provide a basis for the LC TPC groups to help get funding for the LP and other LC TPC work.
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Work Packages for the LCTPC/LPWork Packages for the LCTPC/LP 0) Workpackage:0) Workpackage: TPC R&D program/performance goalsTPC R&D program/performance goals
To be worked out by the LCTPC collaborationTo be worked out by the LCTPC collaboration
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Work Packages for the LCTPC/LPWork Packages for the LCTPC/LP 1) Workpackage1) Workpackage MECHANICSMECHANICS
Groups expressing interest to date(others?)Groups expressing interest to date(others?)
a) LP design (incl. endplate structure) Cornell, Desy, IPNOrsay, MPI,a) LP design (incl. endplate structure) Cornell, Desy, IPNOrsay, MPI, +contribution from Eudet +contribution from Eudet
b) Fieldcage, laser, gas Aachen, Desy, St.Petersburg, b) Fieldcage, laser, gas Aachen, Desy, St.Petersburg,
+contribution from Eudet +contribution from Eudet c) GEM panels for endplate Aachen, Carleton, Cornell, c) GEM panels for endplate Aachen, Carleton, Cornell,
b) CMOS RO electronics: Freiburg, Cern, Nikhef, Saclay, b) CMOS RO electronics: Freiburg, Cern, Nikhef, Saclay, +contribution from Eudet +contribution from Eudet
c) Electr.,powerswitching,cooling Aachen, Desy/HH, Cern, Lund, c) Electr.,powerswitching,cooling Aachen, Desy/HH, Cern, Lund, for LC TPC: Rostock, Montreal, St.Petersburg, for LC TPC: Rostock, Montreal, St.Petersburg,
Tsinghua,Tsinghua, +contribution from Eudet +contribution from Eudet
Leif Joennson
Leif Joennson + ?
Harry van der Graaf
Luciano Musa
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Work Packages for the LCTPC/LPWork Packages for the LCTPC/LP
3) Workpackage3) Workpackage SOFTWARESOFTWARE
Groups expressing interest to Groups expressing interest to date(others?)date(others?)
a) LP SW+simul./reconstr.framework: Desy/HH,Cern,Freiburg, Carleton, a) LP SW+simul./reconstr.framework: Desy/HH,Cern,Freiburg, Carleton, Victoria, +contribution from Victoria, +contribution from
Eudet Eudet
b) TPC simulation, backgrounds Aachen, Carleton, Cornell, b) TPC simulation, backgrounds Aachen, Carleton, Cornell, Desy/HH,Desy/HH,