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The Start point to discuss possible variants of a future Detector Set Up.

The Start point to discuss possible variants of a future Detector Set Up. N.Smirnov, Physics Department, Yale University. ( many thanks for preliminary discussions to R.Bellwied, A.Deshpande, J.Harris, B.Surrow, T.Ullrich, H.Wieman, J.Vavra, C.Woody )

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The Start point to discuss possible variants of a future Detector Set Up.

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  1. The Start point to discuss possible variants of a future Detector Set Up. N.Smirnov, Physics Department, Yale University ( many thanks for preliminary discussions to R.Bellwied, A.Deshpande, J.Harris, B.Surrow, T.Ullrich, H.Wieman, J.Vavra, C.Woody ) March 15-17, 2004, EIC workshop, JLab.

  2. There is a sense to discuss three detector set-up variants. • A la ALEPH, DELPHI, H1, …(variant A) R of Magnet ~2.5 m ( 1.5 T ) EMC – inside of Magnet Return yoke – H. Cal. • A la ZEUS, …. (variant Z ) R of Magnet ~1.0 m ( 2. – 3. T ) EMC – outside of Magnet Return yoke – Hadr. Cal. • A la CLEO, …. ( variant C ) R of Magnet ~1.5 m ( 1.5 T ) EMC – inside of Magnet Return yoke – muon Detector

  3. Detector Set Up (variant A). { SLD Magnet, HC, MD, LArC, …} EMC; Crystals + Fe(Pb)/Sc (accordion type) or Liquid Argon (6x6 mrad towers) HC, “catcher” & Muon Detector. 15 planes, (5. cm Fe, streamer tubes, 0.3 x 4 cm resolution) Gas RICH SC Magnet Coil, 1.5 T ToF, ALICE/STAR clone R = 2.8 m DX dZ = 3.0 m EEMC, Fe/Sc Tracking: Si Vertex Detector, miniTPC ~35 pad rows, Pad Detectors in Barrel and End Caps (micro-pattern technology). Si + Pad Detectors in Forward AG ChD

  4. Simulation conditions • one pion / event • minimum 6 hits / track • - more-less “realistic” detector • response (100% hit efficiency) Pt, Gev/c Pz, Gev/c |η| All momentum;P < 10. GeV/c N of hits/track VS |η|

  5. Detector setup, Variant A Pt reconstruction performance. dPt/Pt, % dPt/Pt, % |η| = {0.05 –3.5} Pt = {0.1 – 3.5} GeV/c |η| 1 2 3 1 2 3 45 20 10 3 , Θ, deg Pt, GeV/c All momentum;P < 10. GeV/c

  6. Momentum reconstruction performance (high Pt) dPt/Pt, % dPt/Pt, % 0.8<IηI < 1.6 IηI < 0.8 10 10 All Tracking Det Pad Det. only 1 1 5. 10. 20. 30. 5. 10. 20. 30. Pt, GeV/c Pt, GeV/c dPt/Pt, % IηI > 2.2 dPt/Pt, % Pt = 10. GeV/c 40 40 10 Pt = 2. GeV/c 10 2. 4. 8. 12. 1 2 3 Pt, GeV/c IηI

  7. Mass reconstruction performance (variant A) Υ e+e- J/Ψ e+e- (1S) (1S) (2S) (3S) (2S) full scale simulation / reconstruction but not realistic background

  8. Particle Identification: dE/dX, ToF, AgChD, gas RICH, ECal, HCal/Muon Detector (TRD or/and “mini TPC+Ch.Det” as more e/π ) π/K/p dE/dx + ToF A1 A1+A2+RICH π RICH A1+ToF A1+A2 K RICH ToF A1+A2 p RICH 1. 2. 3. 4. 5. 6. 7. 8. 9. 10 12. 14. 16 18. P, GeV/c

  9. miniTPC + CsI Pad Detector, proposed variant Input gas window radius – 16. cm Pad detector I with CsI Cathode e- Anode e- Drift: 40-50 cm Fast, low diffusion, UV transparent gas mixture GEMs + Pads Output gas window radius – 80. cm One miniTPC module

  10. Detector Set Up, Variant Z Hadron, EM Calorimeters FEMC, W/Si R = 3.25 m DX gas RICH AeroGel Ch D dZ = 3.9 m SC Magnet Coil, 2.0 T

  11. Detector Setup, Variant ZBarrel tracking and Simulation conditions Tracking: Si Vertex Detector, miniTPC ~15 pad rows, Si and Pad Detectors in Barrel and End Caps (micro-pattern technology). Si + Pad Detectors in Forward

  12. Detector setup, Variant Z. Pt reconstruction performance. dPt/Pt, % dPt/Pt, % Pt = {0.1 – 3.5} GeV/c |η| = {0.05 –3.0} |η| Pt, GeV/c All momentum;P < 10. GeV/c

  13. Instead of conclusion • team should be organized • careful simulation / reconstruction job for different detector set-up variants ( decision / selection in a future ) • R&D activity • Maximum possible “yellow beam line shift” – “R space available for the Detector” • IR design – “Z space available”

  14. Detector Variant on the basis of SLD (variant A) “E side” HC, “catcher” & Muon Detector. 15 planes, (5. cm Fe, streamer tubes, 0.3 x 4 cm resolution) SC Magnet Coil, 1.5 T EMC; Crystals + Fe(Pb)/Sc (accordion type) or LAr variant, 6x6 mrad towers R = 2.8 m ToF DX Gas RICH Tracking: - Si Vertex Detector, - miniTPC ~35 pad rows, - 4-6 Pad Detectors in Barrel and End Caps, micro-pattern technology. - Si + Pad Detectors in Forward dZ = 3.0 m EEMC, Fe/Sc or W/Si

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