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LCTPC Design Issues and R&D Planning: Endcap Feedback

Explore issues in the LCTPC design and R&D plans, detailing phases of work with prototypes and large detectors. Learn about the framework, prototype examples, and facilities used in research and development.

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LCTPC Design Issues and R&D Planning: Endcap Feedback

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  1. Issues for the LCTPC design and their feedback to the endcap and 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 Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  2. could look something like International Linear Collider (ILC) Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  3. LDC/GLD/4th Concepts or A TPC for a Linear Collider Detector Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  4. Goal: to build a high-performance TPC as central tracker for an ILC detector E.g.precision measurements of the …Higgs Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  5. Large Detector Concept example 3x10-5 Particle Flow .30 (N.B. below are TDR dimensions, which have changed for latest LDC iteration) -5 Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  6. LDC GLD HCal ECal TPC Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  7. Physics determines detector design • momentum: d(1/p) ~ 10-4/GeV(TPC only) ~ 0.6x10-4/GeV(w/vertex) (1/10xLEP) e+e-gZHgllX goal: dMmm <0.1x GZ  dMHdominated by beamstrahlung • 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 Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  8. Geant4 Detector Simulation Provides detector hits LCD Analysis Modules: Hit smearing TPC Pattern recognition Calorimeter clustering Event display ... LCIO JAS histograms AIDA tuples e+e- -> ZH Detector: ldmar01 Hits: TPC (cyan), Inner trackers (cyan) EM Cal (blue) Tracks (red) Clusters (green) American Large Detector Simulations e+e- -> ZH -> 4 jets Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  9. Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  10. 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 LP, large prototype, (Ø ≥ 75cm, drift ~ 80cm), 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 Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  11. LCTPC/LP Groups (27 August 06) Americas Carleton Montreal Victoria Cornell Indiana LBNL MIT Purdue Yale Asia Tsinghua CDC: Hiroshima KEK Kinki U Saga Kogakuin Tokyo UA&T U Tokyo U Tsukuba Minadano SU-IIT Europe LAL Orsay IPN Orsay CEA Saclay Aachen Bonn DESY UHamburg Freiburg Karlsruhe MPI-Munich Rostock Siegen NIKHEF UMM Krakow Bucharest Novosibirsk PNPI StPetersburg Lund CERN …Other groups interested? Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  12. What have we been doing in Phase 1 ? Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  13. 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 Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning S2

  14. Pixel TPC Development Freiburg Nikhef Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  15. 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 Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  16. Facilities Saclay 2T magnet, cosmics Desy 5T magnet, cosmics, laser Cern test-beam (not shown) Kek 1.2T, 4GeV hadr.test-beam Desy 1T, 6GeV e- test-beam Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  17. 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 • Design work starting for the Large Prototype Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  18. Phase 2 • Basic Idea: LP should be a prototype for the LC TPC design and test as many of the issues as possible (like, e.g., TPC90 @ Aleph). This will take at least 2 iterations. • The Eudet infrastructure gives us a starting basis for the LP work • The general LCTPC/LP R&D issues and been divided up into workpackages (WP) more later… Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  19. Future meetings -There are bi-weekly workpackage (WP) phonemeetings, #1-#8 up to now -Paris Endcap meeting organized by Paul/Akira (12-15 September 2006): announcements already sent to the LCTPC groups, see http://www-dapnia.cea.fr/Spp/Meetings/EndPlate/ including phonemeeting #9 -Eudet annual meeting MPI-Munich (18-20 October 2006) with website: http://www.eudet.org/AnnualMeeting2006/AnnualMeeting2006.html -European LC workshop Valencia (6-10 November 2006), see http://ific.uv.es/~ilc/ECFA-GDE2006/ -Asian LC workshop Beijing (4-7 February 2007) Website: http://bilcw07.ihep.ac.cn/ Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  20. Excerpts from DODs for GLD and LDC used here as examples DESIGN ISSUES for the LCTPC • Performance • Endplate • Electronics • Chamber gas • Fieldcage • Effect of non-uniform field • Calibration and alignment • Backgrounds and robustness Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  21. Performance • Momentum precision needed for overall tracking? • Momentum precision needed for the TPC? • Good dE/dx resolution, Vº detection • 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 Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  22. LCTPC resolution in the DODs Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  23. ACFA8--July2005 Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  24. Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  25. Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  26. Performance • Momentum precision needed for the TPC • What is the best we can do? Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  27. Keisuke Fujii, PRC report Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  28. Ar3%CF4 Makoto Kobayashi/Keisuke Fujii/Takeshi Matsuda, WP mtg#2 Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  29. LC TPC Endcaps Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  30. GLD GLD Akira Sugiyama Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  31. Arrangements of detectors on the active area of the end cap (2/2) Trapezoidal shapes assembled in iris shape LDC RS/Joel Pouthas/Philippe Rosier Annotations: Px is the type number of PADS boards or frames 12 sectors (30° each) as super modules are defined On each, 7 modules are fixed The sizes of detectors are varying from 180 to 420 mm P2 P3 P4 P1 P2 P3 P4 By rotation of 15° around the axe, these frames are the same These arrangement seems to be the best as only 4 different PADS are necessary Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning Page 2

  32. Principle for a Super Module equipped with detector 1 Carbon wheel with frames 20x100 mm Detector 1 made of 8 mm of epoxy or sandwich Frame of the super module made of 10 mm epoxy reinforced with 15x40 mm carbon bar Deformation limit acceptability to define Here is 20 µm / mbar of pressure Complete wheel with 12 super modules Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning Page 3

  33. Aleph endplate Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  34. Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  35. Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  36. Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  37. 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 Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  38. Design • Gas-amplification technology  input from R&D projects • Chamber gas candidates: crucial decision! • Electronics design: LP WP • Zeroth-order “conventional-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 Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  39. LC TPC Chamber gas(a) gas choice Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  40. LC TPC Chamber gas(b) Ion buildup Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  41. LC TPC Chamber gas(c) ion backdrift/gating Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  42. LC TPC Electronics Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  43. LC TPC Fieldcage Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  44. 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 bad backgrounds? Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  45. LC TPC Non-uniform fields Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  46. LC TPC Calibration/alignment Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  47. LC TPC Backgrounds Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  48. 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. The idea was that this will provide a basis for the LC TPC groups to help get funding for the LP and other LC TPC work. Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  49. Work Packages for the LCTPC/LP0) Workpackage:TPC R&D program/performance goalsTo be worked out by the LCTPC collaboration Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

  50. Work Packages for the LCTPC/LP1) WorkpackageMECHANICSGroups expressing interest to date(others?)a) LP design (incl. endplate structure) Cornell, Desy, IPNOrsay, MPI, +contribution from Eudet b) Fieldcage, laser, gas Aachen, Desy, St.Petersburg, +contribution from Eudet c) GEM panels for endplate Aachen, Carleton, Cornell, Desy/HH, Karlsruhe, Kek/XCDC, Novosibirsk, Victoria d) Micromegas panels for endplate Carleton, Cornell, Kek/XCDC, Saclay/Orsay e) Pixel panels for endplate Cern,Freiburg,Nikhef,Saclay,Kek/XCDC, +contribution from Eudet f) Resistive foil for endplate Carleton, Kek/XCDC, Saclay/Orsay convener in white color Ron Settles Dan Peterson Ties Behnke Akira Sugiyama Paul Colas Jan Timmermans Madhu Dixit Ron Settles MPI-Munich/DESY Paris endcap WS 2006 -- LCTPC Design Issues: R&D Planning

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