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Issues for the LC-TPC design and their feedback to the R&D program

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Presentation on theme: "Issues for the LC-TPC design and their feedback to the R&D program"— Presentation transcript:

1 Issues for the LC-TPC 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

2 International Linear Collider (ILC)
could look something like 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

3 A TPC for a Linear Collider Detector
LDC/GLD/4th Concepts or A TPC for a Linear Collider Detector 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

4 …Higgs E.g.precision measurements of the
Goal: to build a high-performance TPC as central tracker for an ILC detector Expt (GeV) Decay Channel (GeV/c2) ln(1+s/b) 115 GeV/c2 1 ALEPH 206.7 4-jet 114.3 1.73 2 112.9 1.21 3 206.5 110.0 0.64 4 L3 206.4 E-miss 115.0 0.53 5 OPAL 206.6 110.7 6 Delphi 0.49 7 205.0 Lept 118.1 0.47 8 208.1 Tau 115.4 0.41 9 114.5 0.40 10 205.4 112.6 E.g.precision measurements of the …Higgs 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

5 Large Detector Concept example
Particle Flow .30 (N.B. below are TDR dimensions, which have changed for latest LDC iteration) -5 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

6 LDC GLD HCal ECal 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July 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-gZHgll X goal: dMmm <0.1x GZ  dMH dominated by beamstrahlung tracking efficiency: 98% (overall) excellent and robust tracking efficiency by combining vertex detector and TPC, each with excellent tracking efficiency 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

8 American Large Detector Simulations
e+e- -> ZH -> 4 jets 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) 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

9 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

10 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

11 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

12 LCTPC resolution in the DODs
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

13 LC TPC Endcaps 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

14 GLD GLD 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

15 LDC Arrangements of detectors on the active area of the end cap (2/2)
Trapezoidal shapes assembled in iris shape LDC 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning Page 2

16 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning Page 3

17 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

18 LC TPC Chamber gas (a) gas choice
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

19 LC TPC Chamber gas (b) Ion buildup
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

20 LC TPC Chamber gas (c) ion backdrift/gating
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

21 LC TPC Electronics 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

22 LC TPC Fieldcage 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

23 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? 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

24 LC TPC Non-uniform fields
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

25 LC TPC Backgrounds 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

26 LC TPC Calibration/alignment
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

27 R&D Planning 1) Demonstration phase 2) Consolidation phase
Continue work with small prototypes on mapping out parameter space, understanding resolution, etc, to prove feasibility of an MPGD TPC. For CMOS-based pisel TPC ideas this will include proof-of-principle tests. 2) Consolidation phase Build and operate the LP, large prototype, (Ø ≥ 75cm, drift ≥ 100cm), 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 After phase 2, the decision as to which endplate technology to use for the LC TPC would be taken and final design started. 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

28 LCTPC/LP Groups (18 July 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 Saclay Aachen Bonn DESY U Hamburg Freiburg Karlsruhe MPI-Munich Rostock Siegen NIKHEF UMM Krakow Bucharest Novosibirsk PNPI StPetersburg Lund CERN Other groups interested? More formal collaboration now being organized… 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

29 What have we been doing in Phase 1 ?
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

30 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 S1 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning S2

31 Pixel TPC Development Freiburg Nikhef 09/11/2018
Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

32 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

33 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

34 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

35 The Eudet infrastructure gives us a starting basis for the LP work
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., Aleph) The Eudet infrastructure gives us a starting basis for the LP work The general LC TPC R&D issues in addition to the LP R&D which will be planned in conjunction with it 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

36 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. 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

37 Work Packages for the LCTPC/LP 0) Workpackage: TPC R&D program To be defined by the LCTPC collaboration 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

38 …e.g., Takeshi Matsuda et al discussing at bi-weekly meetings…
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

39 Work Packages for the LCTPC/LP 1) Workpackage MECHANICS Groups 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 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

40 Work Packages for the LCTPC/LP 2) Workpackage ELECTRONICS Groups expressing interest to date(others?) a)"Standard" RO/DAQ for LP: Aachen, Desy/HH, Cern, Lund, Rostock, Montreal, Tsinghua, contribution from Eudet b) CMOS RO electronics: Freiburg, Cern, Nikhef, Saclay, contribution from Eudet c) Electr.,powerswitching,cooling Aachen, Desy/HH, Cern, Lund, for LC TPC: Rostock, Montreal, St.Petersburg, Tsinghua, contribution from Eudet Leif Joennson Leif Joennson + ? Harry van der Graaf Luciano Musa 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

41 Work Packages for the LCTPC/LP 3) Workpackage SOFTWARE Groups expressing interest to date(others?) a) LP SW+simul./reconstr.framework: Desy/HH,Cern,Freiburg, Carleton, Victoria, +contribution from Eudet b) TPC simulation, backgrounds Aachen, Carleton, Cornell, Desy/HH, Kek/XCDC, St.Petersburg,Victoria c) Full detector simulation Desy/HH, Kek/XCDC, LBNL Peter Wienemann Peter Wienemann Stefan Roth Keisuke Fujii 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

42 Work Packages for the LCTPC/LP 4) Workpackage CALIBRATION Groups expressing interest to date(others?) a) Fieldmap Cern, contribution from Eudet b) Alignment Kek/XCDC c) Distortion correction Victoria d) Rad.hardness of material St.Petersburg e) Gas/HV/Infrastructure Desy, Victoria, contribution from Eudet Dean Karlen Lucie Linssen Takeshi Matsuda Dean Karlen Anatoliy Krivchitch Desy Postdoc 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

43 Here are some ideas for the evolution up to the Design Phase 3
(under discussion with the collab.) : SP (small prototype) tests, LP1 –> two endplates: Gem+pixel, Microm.+pixel : LP2 -> real LCTPC prototype endplate: Gem or Mm + carbon-fibre sandwich, gating grid, sector/panel shape, LCTPC electronics, gas, etc 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

44 TPC R&D breakdown (prel.)
Gem, Micromegas, Pixel Large, small, odd-shaped panels Fieldcage Sandwich structure SP/LP2 Gating/max. space charge SP/LP2 Point/2-track resolution Momentum meas. in inhomog. B-field dE/dx measurement Gas studies SP Pad shapes SimulationLP1,LP2 Jet environment Beams 1-6 GeV/c electrons 1-20 GeV/c hadrons (+dE/dx) 100 GeV hadrons (+jets) 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

45 TPC milestones 2006-2010 Continue LCTPC R&D via small-prototypes
and LP tests Decide on all parameters Final design of the LCTPC Four years construction Commission/Install TPC in the LC Detector 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

46 No conclusions… Backup slides…
09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

47 LC-TPC Motivation/Goals
…to be LP where possible… continuous 3-D tracking, easy pattern recognition throughout large volume, well suited for large magnetic field ~98-99% tracking efficiency in presence of backgrounds time stamping to 2 ns together with inner silicon layer minimum of X_0 inside Ecal (<3% barrel, <30% endcaps) σ_pt ~ 100μm (rφ) and ~ 500μm 3or4T for right gas if diffusion limited 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 30 x estimated backgrounds 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

48 Two other LC-TPC features will be compensated by good design…
~ 50 μs drift time integrates over 150 BX  design for very large granularity: ~ 2 – 20 x 109 voxels (two orders of magnitude more if CMOS pixel version) ~ end caps with large density of electronics (several million pads) are a fair amount of material  design for smallest amount: ~ 30%X0 or less is feasible design for full precision/efficiency at 30 x estimated backgrounds 09/11/2018 Ron Settles MPI-Munich/DESY Vancouver WS July LCTPC Design Issues: R&D Planning

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