Research & Education Program

1. Research & Education Program presented by Bob van Eijk BAC Meeting University of Twente 11 November 1997 Research & Education Program, Bob van Eijk

2. Contents • Research at the • The experiment at the LHC • Other interests... • Education • Lectures at the University of Twente • Opportunities for UT-students at the NIKHEF Research & Education Program, Bob van Eijk

3. The Large Hadron Collider • Proton-proton collider (7 Tera (1012) eV per proton beam) • use the current LEP (e+e- collider) infrastructure at CERN • new generation of experiments (start in 2005) • high luminosity in 2007 (Lmax=1034 cm-2 s-1 = 105 pb-1 / year) • Standard Model of electroweak interactions • Higgs (the missing particle of the SM) • Super Symmetry (SUSY) may give hint on SM ‘free’ parameters • Bottom quark physics s( ) = 500 mb  51012 per year @ Lstart=1033  CP-violation, rare decays • Top: s( ) = 1 nb  108 per year @ Lmax=1034 cm-2 s-1 precision measurements of couplings, rare decays • W’, Z’, compositeness, ... Research & Education Program, Bob van Eijk

4. The CERN accelerator infrastructure Research & Education Program, Bob van Eijk

5. ATLASA ToroidaL ApparatuS • General purpose detector • lepton,  and hadron energy/momentum measurement • , electron, m,  and hadron identification • transverse missing energy measurement (, SUSY particles, …) • Requires: • excellent charged particle tracking (central tracker: s(pT)/pT = 30 % @ 500 GeV, |h|<2; m-system: s(pT)/pT = 11% @ 1 TeV) • excellent electromagnetic calorimetry (s(E)/E = 10% /E  0.7 %) • good hadronic energy measurement (s(E)/E = 50% /E  3 %, |h|<3), s(E)/E = 100%/E  3 %, 3<|h|<5) • redundancy: excellent alignment between sub-detectors Research & Education Program, Bob van Eijk

6. This is a placeholder for the big ATLAS transparency from the ATLAS poster page Research & Education Program, Bob van Eijk

7.  - tracking system design and construction of 96 central ‘outer chambers’ data acquisition and event trigger design and construction of data rooting architecture (140 million channels producing ~ 120 GByte/s) develop algorithms to reduce the first level trigger rate (100 kHz  ~ 10 kHz) event simulation and event reconstruction software engineering; Object Orientation (OO) central tracking system forward silicon disk design and construction design and construction of pixel detector modules responsibilities Research & Education Program, Bob van Eijk

8. 2T solenoidal B-field 30<R<60 [cm] 60<R<120 [cm] 4<R<16 [cm] Cylindrical volume: 8m3 (2.2m, L=7m) Research & Education Program, Bob van Eijk

9. 14 kW total heat load 140 million channels 2.3 m2 active silicon Research & Education Program, Bob van Eijk

10. L=1033 cm-2 s-1 L=5x1033 cm-2 s-1 (mH = 400 GeV) Research & Education Program, Bob van Eijk

11. Other interests... • High radiation levels inside ATLAS • silicon detectors at small radius do not survive… • search for alternative sensor: diamond • Beam telescope • R&D tool for strip and pixel detector development • Fast microtrack imaging • Training & Mobility of young Researchers (TMR) • collaboration with industries • Physics simulations • QCD calculations: top physics • SUSY modeling Research & Education Program, Bob van Eijk

12. SCT Radiation Fluence of charged hadrons per cm2/year Fluence of 1 MeV equivalent neutrons per cm2/year Radiation dose (10 yrs LHC-equiv.) 0.8 - 1.3 x 1014 n/cm2 40 - 100 kGray (lethal dose = 1 Gy) Research & Education Program, Bob van Eijk

13. SCT Modules (Barrel) Research & Education Program, Bob van Eijk

14. SCTReadout/Electronics • binary front end • noise < 1500 e  noise occupancy < 5x10-4 • e = 99% • radiation hard to 2x1014 n/cm2, 10 Mrad • pipelined (128 long) • optical data transmission and clock/control • LED/PIN (820 nm) • radiation-hard multi-mode fibre (2 out, 1 in) • off-detector ROD and ROB • redundant data paths and f/e chip bypassing • Dtmin(L1) = 2 bunch crossings Research & Education Program, Bob van Eijk

15. SCTSignal to Noise • n-side strips (simulation) • Cstrip = 1.5 pF/cm @ 0 p/cm2 • Cstrip = 1.2 pF/cm @ type inversion Research & Education Program, Bob van Eijk

16. SCT-Mechanics(Forward) • 0-CTE, CFRP-support structures (space frame, disks) • space frame carries disks, long services and cooling • de-coupling of space-frame from disk (kin. mount) • disk carries module, local services and cooling • de-coupling of modules from disk (kin. mount) Research & Education Program, Bob van Eijk

17. Disk layout: front view view Research & Education Program, Bob van Eijk

18. view Disk Layout: back view Research & Education Program, Bob van Eijk

19. # tracksavg 250 300 New Physics New Hardware ( why cool a Si-tracker ? ) Ptot = 25 kW #chan. = 6.2*106 Atotal = 60 m2 Lmax=1034 cm-2 s-1 rsi = 70 Wm-2 rel = 350 Wm-2 (3.4 mW/chan.) Ldt = 105 pb-1 Tsi = -7 C Dtbunch= 25 ns Lmax = 7 m max = 1.2 m Astrip = 9 mm2 Bmax = 2 T Pitch = 75 mm Research & Education Program, Bob van Eijk

20. Research & Education Program, Bob van Eijk

21. SCT(principle of module cooling connection) FE-chips quartzfan-ins heat spreader silicon detectors BeO hybrid PG-connections blocks disk large flow ectronics cooling channel  4W small flow detector cooling channel  1 W Z PG = Pyrolythic Graphite ltherm 300 -700 W / m K R Research & Education Program, Bob van Eijk

22. H gg Research & Education Program, Bob van Eijk

23. Research & Education Program, Bob van Eijk

24. CP-Violation Research & Education Program, Bob van Eijk