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F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

The Muon System of the 4 th Concept Detector. at. F. Grancagnolo, INFN - Lecce. ILC Workshop - ECFA and GDE Joint Meeting Valencia, 5-13 November 2006. F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006. 4 th Concept Detector Layout. NOVEL FEATURES:.

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F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

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  1. TheMuon Systemof the 4th Concept Detector at F. Grancagnolo, INFN - Lecce ILC Workshop - ECFA and GDE Joint Meeting Valencia, 5-13 November 2006 F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  2. 4th Concept Detector Layout NOVEL FEATURES: Triple-readout fiber calorimeter: scintillation/Cerenkov/neutron Muon dual-solenoid iron-free geometry 7.7 m 6.4 m F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  3. Dual Solenoid B-field Alexander Mikhailichenko design m - BARREL m - E CN AD P TPC F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  4. m-System basic element: drift tube • radius 2.3 cm • filled with 90% He – 10% iC4H10 @ NTP • gas gain few × 105 • total drift time 2 µs • primary ionization 13 cluster/cm ≈ 20 electrons/cm total • both ends instrumented with: • > 1.5 GHz bandwith • 8 bit fADC • > 2 Gsa/s sampling rate • free running memory • for a • fully efficient timing of primary ionization: cluster counting • accurate measurement of longitudinal position with charge division • particle identification with dNcl/dx ASIC chip under development at INFN-LE F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  5. tfirst t0 t0 Cluster Counting full vertical scale = 30 mV (amplification x10) horizontal scale = 500 ns/div sampling rate = 2.5 Gsa/s Cosmic ray triggered by scintillators telescope and read out by a digital sampling scope: 8 bit, 4 GHz, 2.5 Gsa/s Amplifier bandwith: 1.8 GHz, gain ×10 t0 = tlast-tmax bf = ∫ v(t) dt (c/2)2 = r2- bf2 Ncl = c/(lbg×sinq) Nele = Ncl× 1.6 tlii=1,Nele ;trii=1,Nele Alii=1,Nele;Arii=1,Nele Pi(cl)i=1,Nele left 5 mV 50 ns very preliminary set-up right 2 cm tube gas: 90% He + 10% iC4H10 Ncl = 13./cm Nele = 20./cm Max drift time 1.3 ms trigger 1.3 ms tfirst tlast F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  6. from KLOE sb b Cluster Counting Performances (1) Transverse spatial resolution In principle, given the time ordered sequence of the drifting clusters, each cluster contributes to the impact parameter with an independent estimate. sb = sbi/ √Ncl (saturated by other conributions, like position and sag of sense wire) In reality, multiple electron clusters and single electron diffusion tend to confuse the picture. For Ncl = 13/cm is reasonable to assume: sxy ≈ 50 mm F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  7. Cluster Counting Performances (2) Longitudinal spatial resolution Matching left and right sides gives a very precise measurement of the signals transit time on the wire(limiting factor for time-to-distance conversion) and enhances signal/bkgd. After matching, charge division can be applied to single electrons amplitudes Ali and Ari. In principle: Dz/L = 0.5% / √Nele Well below 1 mm/m of wire Estimate of dip angle Ncl = c/lbg×1./sinq For an average c and a minimum ionizing track, Ncl = 40 sq≈ 200 mrad (a few mm extrapolation from one layer to next) extremely powerful tool for 3D track finding! F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  8. Cluster Counting Performances (3) Transverse momentum resolution • Assume: • l = 1.5 m • sb = 50 mm • B = 1.5 T • n= 20 layers Dp/p = 3.0 × 10-4 p  1.6 × 10-2 (barrel) Equal contribution at p=53 GeV/c, when Dp/p= 2%, or Dp= 1.2 GeV/c In the end cap one would need the map of B-field and MC calculations. However, resolutions like: Dp/p = 1.4 × 10-3 p 1.4 × 10-2(end caps) are reachable F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  9. s(dNcl/dx)/(dNcl/dx) ≈ 3% Cluster Counting Performances (4) Particle identification It might not be necessary in the m-system. However, for a m.i.p. (a m.i.p. track in the m-system generates approximately 1200 clusters) Equivalent to: p/K separation ≿ 3s up to 25 GeV/c, ; ≿ 2s up to 55 GeV/c ; ≿ 1s up to 100 GeV/c m/p separation ~ 1s up to 5 GeV/c (CAVEAT: No data available!, Calculation based on Bethe-Block only!) Example from test beam data: p/m sepration @ 200 MeV/c G.Cataldi, F.Grancagnolo and S.Spagnolo, INFN-AE-96-07, Mar. 1996, 23p. G.Cataldi, F.Grancagnolo and S.Spagnolo, NIM A386 (1997) 458-469 F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  10. gas mixture = 95%He+5%iC4H10 Ncl = 10/cm beam test measurements p = 200 GeV/c Cluster Counting Performances (5) • at 200MeV/c • experiment: • p/m = 1.3 s • theory: trunc. mean: • p/m = 2.0 sp/m = 0.5 s F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  11. tmax s(tmax) ~ 1 ns Cluster Counting Performances (6) Drift time of last arriving electron corrected for t.o.f. and for transit time on the wire. Assumed 10 tracks with 100 hits each. From tmax one gets t0event by event, avoiding long and complicated calibration procedures. Moreover, s(t) ~ 1 ns identifies the trigger of the event F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  12. Drit tube end plug detail F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  13. Modularity ×18 1750 tubes 70 cards 650 tubes 26 cards ×18 ×36 550 tubes 22 cards F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  14. 1/3 barrel ×3 10500 tubes 420 cards F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  15. 1/3 end cap 1440 tubes 1632 channels 76 cards ×6 F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  16. End cap ×2 F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  17. Full m-system F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  18. Channel count Barrel: 31500 tubes 21000 channels 840 cards End caps: 8640 tubes 9792 channels 456 cards Total: 40140 tubes 30792 channels 1296 cards F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  19. m+m− at 3.5 GeV/c F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  20. 50 GeV jet with escaping p F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  21. 80 GeV jet with escaping particles F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  22. 80 GeV jet with escaping particles F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  23. 90% He + 10% iC4H10 91% Ar + 5% iCH4 + 4% N2 Cluster Counting cylindrical tube r = 2 cm at a gain = few × 105 time separation (MC) between closest clusters as a function of their distance from the sense wire for different track impact parameters In He In Ar • In He , provided that: • rise (and fall) time of single electron signals < 1ns • sampling frequency of electron signals > 2 Gsa/s single electron counting is possible. CAVEAT: Multiple electron clusters (30% in this He mixture) complicates the picture F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

  24. Cluster Counting Time separation (MC) between closest ionization clusters along a track as a function of their distance from the sense wire for different track impact parameters cylindrical tube r = 2 cm gain = few × 105 90% He + 10% i-C4H10 91% Ar + 5% CH4 + 4% N2 In He , provided that: rise (and fall) time of single electron signals < 1ns sampling frequency of electron signals > 2 Gsa/s single electron counting is possible. CAVEAT: Multiple electron clusters (30% in this He mixture) complicates the picture F. Grancagnolo ILC Workshop Valencia , 8 . 11 . 2006

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