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Accelerator based experimental particle physics

Accelerator based experimental particle physics. Experimental Challenges of Big Collider Experiments DELPHI@LEP 1989 - 2000 CERN D0@Tevatron 2001 - ~2008 Fermilab ATLAS@LHC ~2007 -> CERN Presented by Kerstin Jon-And 2003-03-06. Collider experiments with SU participation.

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Accelerator based experimental particle physics

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  1. Accelerator based experimental particle physics Experimental Challenges of Big Collider Experiments DELPHI@LEP 1989 - 2000 CERN D0@Tevatron 2001 - ~2008 Fermilab ATLAS@LHC ~2007 -> CERN Presented by Kerstin Jon-And 2003-03-06

  2. Collider experiments with SU participation The ATLAS instrumentation projects are a close collaboration between the Particle Physics and the Instrumentation Physics groups.

  3. Physics requirements (examples) H   photons em calorimeter mH~ 1.3 GeV (~ 1%) H  4 muons muon tracking mH~ 3.6 GeV in mag. field (~ 2%) SUSY jets hadron missing ET calorimeter (~ 4%@400GeV) top e, , jets B physics vertex inner detector R~ 12 m (pixel)  ~ 1ps tracking

  4. Inner detector Electromagnetic calorimeter Hadron calorimeter Muon system Photons Electrons Charged hadrons Neutral hadrons Muons Neutrinos and neutralinos

  5. CERN LEP/LHC SPS

  6. Fermilab

  7. ATLAS Vikt 7000 t 22 m 44 m

  8. Subdetector technologies

  9. Higgsinto twophotonsnopile-up

  10. Higgsinto twophotonsL=10^34pile-up

  11. SMT ~ 793,000 readout channels ~6000 chips

  12. SMT ladder

  13. Sara at work at Fermilab testing Si detectors.

  14. ATLAS Tile calorimeter barrel, 64 modules à 6 m and 10 tons extended barrel extended barrel, 32 modules à 3 m

  15. Tilecal principle PMT WLS fiber scintillator iron particles

  16. Tilecal electronics requirements • To digitize PMT signals obtained from different calorimeter segments. • To provide a dynamic range of 16 bits for the energy measurements. Two versions of each signal, a high and a low gain, are presented to the digitizer, which contains the logic to choose gain. • To digitize data every 25 ns and store data in a pipeline for at least 2.5 s awaiting the Lvl1 decision. • To be sufficiently radiation tolerant. • Adopt the design to the space available inside the “drawers”.

  17. Digitizer boards 256 “super drawers” with 6 or 8 boards  ~ 2000 boards

  18. boss boss technical genius (prof) administrative boss(prof) Tilecal m’g’ment @ CERN technical experts (PhD stud) local engin. U. of Clermont-F industry 1 LHCK GRID industry 2 industry 8 industry 9 industry 10 QC 2000 digitizers ATLAS in the pit 2007 Tilecal @ CERN physics data!! Tilecal electronics SU

  19. Jonas and Magnus at work at Tilecal digitizer test bench

  20. Pre-assembly of Tilecal: 20.01.2003 - 14 Modules

  21. FUTURE developments? Upgrading the LHC … the SLHC D0 upgrade for run IIb in 2006 - ongoing at Fermilab From presentation by R. Cashmore ATLAS week Feb. 2003 • Initial Studies • Physics • Detector R&D Detector development for a linear e+e- collider?

  22. + Talks by F. Gianotti, D. Green and F. Ruggiero at the ICFA Seminar (Oct 2002) References

  23. From presentation by R. Cashmore ATLAS week Feb. 2003 Conclusions • LHC luminosity upgrade can extend: • physics reach of LHC at a moderate extra cost relative to initial LHC investment. • the LHC ‘lifetime’ • To realise this reach, the LHC detectors must preserve performance: • trackers must be rebuilt, and • calorimeters, muon systems, triggers and DAQ need development. • Upgrades programme, from launch to data taking will take 8-10 years • The time to start is soon. • If the path of going to higher luminosities is chosen then need to • support a detector and acceleratorR&D programme similar to the DRDC* one but perhaps more directed. • * Current LHC detector technologies were chosen after a very successful Detector R&D programme launched by CERN in early 90’s

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