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Linear collider muon detector:

Linear collider muon detector:. Marcello Piccolo Amsterdam, April 2003. Agenda. Simulation: Started running with V 3.07 in Brahms. Few preliminary results Results available also from the other side of the Atlantic….reasonable agreement.

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Linear collider muon detector:

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  1. Linear collider muon detector: Marcello Piccolo Amsterdam, April 2003

  2. Agenda • Simulation: • Started running with V 3.07 in Brahms. Few preliminary results • Results available also from the other side of the Atlantic….reasonable agreement. • R&D Dedicated real work started or starting on a very short time base. Marcello Piccolo

  3. The new Brahms release • The (Fortran) Code to full simulate the Tesla detector has been upgraded (thanks to Ties and Vasily): • W-Si calorimeter option has been implemented • Had Cal is based on the scintillator design. • The Design Report muon detector has also been folded in. • As of now it is possible to write a complete hit file containing: • Tracking detectors • Calorimeters • Muon detector Marcello Piccolo

  4. The new Brahms release (cont.) Marcello Piccolo

  5. Muon ID with dE/dx Correction Marcello Piccolo

  6. Here are the overall results:ZH events @500 GeV The four spectra refer to: Black: generated primary particles Red : generated m Green: identified m Blue : misidentified p 7000 evt’s Marcello Piccolo

  7. Some R&D points on the EU side of the Atlantic • There are few issues that need to be addressed : • RPC (either bakelite or glass) have to be certified as rate capable. • Gas mixes that grant to be neutron transparent, especially for the end-caps have to be found. • Working regimes have to be investigated in different rates environment. Marcello Piccolo

  8. Conceptual view of the facility Marcello Piccolo

  9. Simulated beam energy spectra Marcello Piccolo

  10. Particle multiplicity Marcello Piccolo

  11. Efficiency bidimensional mapA good bakelite RPC The overall efficiency For this module is • = (92.7±.05 ) % Cosmic ray data Marcello Piccolo

  12. Efficiency bidimensional mapGlass RPC’s Marcello Piccolo

  13. Plateaux for two 1.1 m2 Glass RPC’s Turn on for streamer pulses on Glass RPC. Detector dimensions 1x1.1 m2 Gas mix 60/35/5 Ar/Fr/Isob Marcello Piccolo

  14. Transverse and longitudinal efficiency distributions Glass RPC The “tube ‘ structure of the Glass RPC is apparent in the first plot where boundaries between different Detectors can be seen as a drop In the efficiency. The distribution along the other coordinate is flat as expected Marcello Piccolo

  15. R & D is Needed – Why? • How good is muon ID? For full LC menu? • Does E-flow benefit frommCal?. • Requires integration with barrel and forward tracking and calorimetry, structural Fe, solenoid, mechanical support, cables, etc. • Robust design parameters - must be understood, optimized, cost estimated, reviewed…. • Best m detector design? Marcello Piccolo

  16. Mechanical Engineering • Statics OK with 47T plates; • Bolting appears to be possible structurally. • Open questions: • Machined Fe? • Groove fitted? • Spokes a la CMS? • Bolted? • Opportunities for further ME work here. Marcello Piccolo

  17. Extruded Scintillator R&D at Fermilab • Studied Wavelength shifting (WLS) fiber readout of scintillator extrusions for possible future large scale detectors • Scintillator: MINOS extrusions • 1 X 4 cm – grooved • TiO2 reflector • Scintillator: KEK prototype • 1.2 X 2.5 cm – hole down the middle • TiO2 reflector • WLS: Kuraray Y11 • 1.2 mm 175 ppm (MINOS Standard) • 1.0 mm 200 ppm • 0.5 mm 200 ppm • Photodetector - Visible Light Photon Counter (VLPC) • Used D0 HISTE VI devices • QE=80-85% • Gain »60,000 Alan Bross – March 2003 Marcello Piccolo

  18. VLPC Tests with MINOS Scintillator • 1.2 mm WLS fiber (MINOS) results using VLPCs. Tests of 1.0 & 0.5 mm fibers, etc. Want to try co-extr of scint + fiber. MINOS Ref. Value (sum) Alan Bross March2003 Marcello Piccolo

  19. Outlook and Conclusions • Simulation tools specific to the muon filter are being developed both in Europe and U.S. • Preliminary results seems to be in comfortable agreement. • R&D programs (again specific) to muon detector have started and will be in full swing in the coming months. • Interesting developments also relevant for the hadronic calorimeter will be pursued. Marcello Piccolo

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