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TPC R&D for an ILC Detector Status January 2007

TPC R&D for an ILC Detector Status January 2007. OUTLINE Overview LCTPC LCTPC Collaboration R&D efforts, status, next steps. HISTORY 1992: First discussions on detectors in Garmisch-Partenkirschen (LC92). Silicon? Gas? 1996-1997: TESLA Conceptual Design Report. Large wire TPC, 0.7Mchan .

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TPC R&D for an ILC Detector Status January 2007

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  1. TPC R&D for an ILC DetectorStatus January 2007 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  2. OUTLINE • Overview LCTPC • LCTPC Collaboration • R&D efforts, status, next steps Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  3. 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&D 11/2001:DESY PRC proposal. for TPC R&D (European & North American teams) 2002:UCLC/LCRD proposals 2004: After ITRP, WWS R&D panel Europe 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) GOAL To design and build an ultra-high performance Time Projection Chamber …as central tracker for the ILC detector, where excellent vertex, momentum and jet-energy precision are required Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  4. LDC (old) HCal ECal TPC GLD Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  5. LDC/GLD=ILD Concept or A TPC for a Linear Collider Detector Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  6. 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 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  7. Physics determines detector design • momentum: d(1/p) ~ 10-4/GeV(TPC only) ~ 0.3x10-4/GeV(w/vertex) (1/10xLEP) e+e-gZHgllX  dσHdominated 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 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  8. Overview of LCTPC design issues • Performance • Endplate • Electronics • Fieldcage • Chamber gas • Space charge • Non-uniform fields • Calibration • Backgrounds • …and R&D to address these issues, see report to the BILCW07 tracking review (Beijing Feb.2007): • LC Note LC-DET-2002-008 at • http://flcweb01.desy.de/lcnotes Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  9. Large Detector Concept example 3x10-5 Particle Flow .30 Particle flow -5 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  10. Performance,Resolution@Beijing Review w/ MPGD! Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  11. Astushi Yamaguchi, Keisuke Fujii @ ACFA 8 (Jupiter framework) B=3T, σ~120μm Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  12. Jet Physics … it is easier to find one in e+e- Jet event in e+e-collision STAR Au+Au collision Jim Thomas, Star TPC review Oct.2006 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  13. Detector goals are changing a bit… Now 2x10-5/(GeV/c) Now 0.25GeV/E @ Zpeak Particle Flow Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  14. 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… Beijing Tracking Review Feb.2007 10 examples, year 1992 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  15. R&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. Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  16. 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 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  17. LCTPC R&D Groups Americas Carleton Montreal Victoria Cornell Indiana LBNL Louisiana Tech Asia Tsinghua CDC: Hiroshima KEK Kinki U Saga Kogakuin Tokyo UA&T U Tokyo U Tsukuba Minadano SU-IIT Europe Brussels LAL Orsay IPN Orsay CEA Saclay Aachen Bonn DESY U Hamburg Freiburg Karlsruhe MPI-Munich Rostock Siegen NIKHEF Novosibirsk Lund CERN Observer groups Iowa State MIT Purdue Yale TU Munich UMM Krakow Bucharest Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  18. LCTPC Collaboration - MOA Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  19. LCTPC MOA Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  20. LCTPC Collaboration CB Members Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  21. LCTPC Collaboration CB Members Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  22. Regional Coordinators Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  23. TB Members - Workpackages Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  24. TB Members - Workpackages Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  25. Open to new groups Signatures being collected Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  26. What have we been doing in Phase 1 ? TPC School talks by Luciano, Keisuke, Takeshi, Yulan, Paul, Huan, Ralf, me… Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  27. S1 Gas-Amplification Systems: Wires & MPGDs 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 P~140 μm D~60 μm S1/S2 ~ Eamplif / Edrift Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School S2

  28. Examples 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 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  29. Facilities Saclay 2T magnet, cosmics Desy 5T magnet, cosmics, laser Cern test-beam (not shown) EUDET Kek 1.2T, 4GeV hadr.test-beam Desy 1T, 6GeV e- test-beam Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  30. Phase 1 R&D MWPC ruled out Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  31. Phase 1 R&D Standard Micromegas ruled out Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  32. Phase 1 R&D GEM feasible Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  33. Phase 1 R&D Micromegas (and GEM) with resisitive anode feasible Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  34. Phase 1 R&D Pixel “proof of principle” Pixel + Micromegas Pixel + GEM Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  35. 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 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  36. What will we be doing in Phase 2 ? From Beijing Tracking Review Feb.2007 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  37. 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 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  38. Backgrounds/alignment/distortion-correction • 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 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  39. Workpackage 1: Mechanics@LP1 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  40. Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  41. Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  42. Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  43. Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  44. Workpackage 2: Electronics From Beijing Tracking Review Feb.2007 Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  45. Workpackage 3: Software, Simulation Simulation: Tracking efficiency 99.5% at 1% occupancy Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  46. Simulation: Background ~ 0.1% occupancy Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  47. Simulation Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  48. Performance • Momentum precision for the TPC  What is the best we can do? Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  49. Keisuke Fujii Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

  50. Ron Settles MPI-Munich/Desy CCAST-Tsinghua TPC School

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