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Linear collider muon detector: What’s new in Europe

Linear collider muon detector: What’s new in Europe. Marcello Piccolo Arlington, Jan. 2003. Agenda. ADVANCES (?) Mainly simulation tried version 3.0.6 for Brahms (thanks Ties) Debugging stage almost over Capability of writing hits files for calorimetry and muon system

jonah-henson
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Linear collider muon detector: What’s new in Europe

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  1. Linear collider muon detector: What’s new in Europe Marcello Piccolo Arlington, Jan. 2003

  2. Agenda ADVANCES (?) Mainly simulation tried version 3.0.6 for Brahms (thanks Ties) Debugging stage almost over Capability of writing hits files for calorimetry and muon system will try to integrate the two devices R&D Beam time allocated at Frascati (Three weeks ) Marcello Piccolo

  3. The new Brahms release • The (Fortran) Code to full simulate the Tesla detector has been upgraded: • W-Si calorimeter option has been implemented • Had Cal is based on the scintillator design. • 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.) • I tried to integrate a relevant number of events in order to check performances and reproduce previous results. • My plans were to run ~10000 bb events and 10000 ZH events, but I was able to simulate about 4000 bb events and 1000 ZH events. • The complete package takes a couple of minutes/event on a P4/1.7GHz for the entire thing; a factor 4 less if one starts from a hit file and does only reconstruction. Marcello Piccolo

  5. Single positive muon efficiency • Comparison between the old simulation (open dots) and the new 3.0.6 one (full dots). • Some hints of non-optimized matching can be seen. Marcello Piccolo

  6. Energy leakage • Here too there seem to be discrepancies between the two releases: • The newer version seems to have smaller leakage into the muon filter. • This statement has to be taken cum granosalis, as I did not have a chance of looking at results in detail. • Next meeting I’ll probably be able to say more on this issue. Marcello Piccolo

  7. Let’s now go to bb events • Here is the overall momentum spectrum of the produced hadrons. • It is worth noticing the relatively low momenta of the produced particles. • The average momentum is a bit less than 10 GeV/c Marcello Piccolo

  8. Here are the overall results:bb events @500 GeV The four spectra refer to: Black: generated primary particles Red : generated m Green: identified m Blue : misidentified p ~4000evt’s Marcello Piccolo

  9. 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 1000 evt’s Marcello Piccolo

  10. Some R&D points • 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

  11. The Frascati Test Beam Facility Marcello Piccolo

  12. Conceptual view of the facility Marcello Piccolo

  13. Particle multiplicity Marcello Piccolo

  14. In the coming months • Look deeper and (hopefully) understand the details of the new simulation tools. • Merge had-cal hits and muon hits to reduce the muon detection threshold. • Start developing a swimming routine to follow penetrating tracks through the different detector subsystems. • Start the R&D program on parallel plate chambers at TBF in Frascati. Marcello Piccolo

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