1. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk1 presented by Bob van Eijk BAC Meeting University of Twente 11 November 1997 Research & Education Program

2. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk2 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

3. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk3 The Large Hadron Collider Proton-proton collider (7 Tera (10 12 ) 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 (L max =10 34 cm -2 s -1 = 10 5 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  ( ) = 500  b  5  10 12 per year @ L start =10 33  CP-violation, rare decays –Top:  ( ) = 1 nb  10 8 per year @ L max =10 34 cm -2 s -1  precision measurements of couplings, rare decays –W’, Z’, compositeness,...

4. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk4 The CERN accelerator infrastructure

5. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk5 ATLAS A ToroidaL ApparatuS General purpose detector –lepton,  and hadron energy/momentum measurement – , electron, ,  and hadron identification –transverse missing energy measurement (, SUSY particles, …) Requires: –excellent charged particle tracking (central tracker:  (p T )/p T = 30 % @ 500 GeV, |  |<2;  -system:  (p T )/p T = 11% @ 1 TeV) –excellent electromagnetic calorimetry (  (E)/E = 10% /  E  0.7 %) –good hadronic energy measurement (  (E)/E = 50% /  E  3 %, |  |<3),  (E)/E = 100%/  E  3 %, 3<|  |<5) –redundancy: excellent alignment between sub-detectors

6. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk6 This is a placeholder for the big ATLAS transparency from the ATLAS poster page

7. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk7  - 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

8. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk8 2T solenoidal B-field Cylindrical volume: 8m 3 (  2.2m, L=7m) 4<R<16 [cm] 30<R<60 [cm] 60<R<120 [cm]

9. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk9 140 million channels2.3 m 2 active silicon 14 kW total heat load

10. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk10 L=10 33 cm -2 s -1 L=5x10 33 cm -2 s -1 (m H = 400 GeV)

11. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk11 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

12. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk12 Fluence of charged hadrons per cm 2 /year Fluence of 1 MeV equivalent neutrons per cm 2 /year SCT Radiation Radiation dose (10 yrs LHC-equiv.) 0.8 - 1.3 x 10 14 n/cm 2 40 - 100 kGray (lethal dose = 1 Gy)

13. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk13 SCT Modules (Barrel)

14. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk14 SCT Readout/Electronics binary front end –noise < 1500 e  noise occupancy < 5x10 -4 –  = 99% –radiation hard to 2x10 14 n/cm 2, 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  t min (L1) = 2 bunch crossings

15. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk15 SCT Signal to Noise n-side strips (simulation) C strip = 1.5 pF/cm @ 0 p/cm 2 C strip = 1.2 pF/cm @ type inversion

16. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk16 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)

17. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk17 Disk layout: front view view

18. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk18 Disk Layout: back view view

19. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk19 New Physics New Hardware A strip = 9 mm 2 T si = -7 C  si = 70 Wm -2  el = 350 Wm -2 (3.4 mW/chan.)  t bunch = 25 ns L d t = 10 5 pb - 1 L max = 10 34 cm -2 s -1 #chan. = 6.2*10 6 P tot = 25 kW A total = 60 m 2 L max = 7 m  max = 1.2 m B max = 2 T # tracks avg 250 300 # tracks avg 250 300 ( why cool a Si-tracker ? ) Pitch = 75  m

20. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk20

21. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk21 SCT (principle of module cooling connection) silicon detectors FE-chips disk PG-connections blocks heat spreader BeO hybrid large flow ectronics cooling channel  4W small flow detector cooling channel  1 W quartz fan-ins PG = Pyrolythic Graphite therm  300 -700 W / m K R Z

22. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk22 H  

23. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk23

24. UT, Enschede, 11/11/'97Research & Education Program, Bob van Eijk24 CP-Violation