ALICE & heavy ion physics

1. ALICE & heavy ion physics Michal Šumbera Nuclear Physics Institute AS CR, Řež

2. PHASE DIAGRAM OF QCD MATTER Michal Šumbera RECFA- Prague 2000

3. SPS lead beam experiments Study of strange and multi-strange baryon production in lead-lead collisions High statistics study of photons, neutral hadrons and charged particles, and their correlations in Pb-Pb collisions. Study of electron-pair production at high energy heavy ion collisions. Michal Šumbera RECFA- Prague 2000

4. WA97/NA57 • Institute: • Institute of Physics, Prague • People: P.Závada, P.Staroba, J.Weichert, J.Böhm, K.Píška • Activities: • Maintenance and operation of the beam trigger counters • Event reconstruction using data from pixel telescope • HBT interferometry • Phenomenological analysis of multi-strange baryon production Michal Šumbera RECFA- Prague 2000

5. WA97/NA57 Michal Šumbera RECFA- Prague 2000

6. Michal Šumbera RECFA- Prague 2000

7. Enhanced production of multi-strange baryons:Signature of QGP Michal Šumbera RECFA- Prague 2000

8. WA98 • Institute: • Nuclear Physics Institute, Řež • People: M.Šumbera, S.Eliseev,V. Petráček, I. Hřivnáčová, A. Kugler, M. Pachr,J. Rak • Activities: • Maintenance and operation Silicon Drift Detector • Data analysis • Search for Disorientd Chiral Condensates • Study of multiparticle correlations Michal Šumbera RECFA- Prague 2000

9. Michal Šumbera RECFA- Prague 2000

10. M.M. Aggarwal et al. Phys. Rev. Lett. 83(1999)926 Michal Šumbera RECFA- Prague 2000

11. Direct photon result Preliminary Michal Šumbera RECFA- Prague 2000

12. CERES/NA45 • Institute: • Nuclear Physics Institute, Řež (since 1997) • People: M.Šumbera, V.Kouchpil,V. Petráček, J.Rak, D.Adamová, V.Hanzal, I.Hřivnáčová • Activities: • Maintenance and operation of doublet of Silicon Drift Detectors • Data analysis • Search for open charm production • High pT particle production Michal Šumbera RECFA- Prague 2000

13. Michal Šumbera RECFA- Prague 2000

14. Michal Šumbera RECFA- Prague 2000

15. WA98 & NA45/CERES: Radial Silicon Drift Detectors Michal Šumbera RECFA- Prague 2000

16. Michal Šumbera RECFA- Prague 2000

17. Michal Šumbera RECFA- Prague 2000

18. Enhanced production of low pT e+e- pairs:Signature of chiral symmetry restoration Michal Šumbera RECFA- Prague 2000

19. ALarge Ion Collider Experiment Michal Šumbera RECFA- Prague 2000

20. Michal Šumbera RECFA- Prague 2000

21. ALICE in  the Czech Republic • Institutes: • Institute of Physics, Prague • Nuclear Physic Institute, Řež • People (19): D. Adamová, J.Hošek, V.Hanzal, I.Hřivnáčová, S.Kouchpil,V.Kouchpil, A.Kugler, J.A.Mareš, E.Mihóková, J.Nikl, V.Petráček, K. Píška, K.Polák, M.Šumbera, P.Tlustý, V.Wagner, P.Závada,D.Zákoucký, I. Zborovský • Activities: • Silicon Drift Detectors • Low Voltage Supply for Silicon Drift Detectors • Scintillation Detectors • Physics • Off-line Michal Šumbera RECFA- Prague 2000

22. ALICE Inner Tracking System Michal Šumbera RECFA- Prague 2000

23. View of ITS space frame and SDD ladders 2 layers of Silicon Strip Detectors 2 layers of Silicon Drift Detectors 2 layers of Silicon Pixel Detectors Michal Šumbera RECFA- Prague 2000

24. Large area linear Si-drift detector prototypefor ALICE experiment • Designed in 1996 by Vojtěch Petráček (NPI Řež) and Pavel Rehak (BNL). • Innovation w.r.t. previous ALICE prototypes: hexagonal geometry with rectangular active region allowing very simple alignment of detectors on the ladder. • Mask and detector fabrication @ ASICentrum Prague, ICM Prague and TESLA SEZAM Rožnov pod Radhoštěm. Michal Šumbera RECFA- Prague 2000

25. Basic detector characteristics • Rectangular active region 50 x 67 m • 9% of dead region (guard structures) • Implanted P+ resistor HV divider • 200 anodes on each side of the detector (anode pitch 250 m) • 3 lines of MOS , N+ and N+(AC) charge injection structures • Precise openings in metalization for laser-induced charge injection • Anode structures around the guard zone allows to study leakage currents in this region • Detector is fabricated on 3.5 kOhm/cm NTD N Si Michal Šumbera RECFA- Prague 2000

26. Michal Šumbera RECFA- Prague 2000

27. Laboratory and beam test of ALICE SDD prototypes Michal Šumbera RECFA- Prague 2000

28. Vojtěch Petráček Pavel Tlustý Dalibor Zákoucký Michal Šumbera RECFA- Prague 2000

29. V. Petráček et al. ALICE INT 99-26 Beam test of 4” Linear Silicon Drift Detector prototypes Michal Šumbera RECFA- Prague 2000

30. V. Petráček et al. ALICE INT 99-26 Beam test of 4” Linear Silicon Drift Detector prototypes Michal Šumbera RECFA- Prague 2000

31. V.Petráček: ALICE ITS TDR CERN/LHCC 99-12 LV power supply for the ITS/SDD - scheme of the ladder part Michal Šumbera RECFA- Prague 2000

32. V.Petráček: ALICE ITS TDR CERN/LHCC 99-12 LV power supply for SDD layer of ITS Michal Šumbera RECFA- Prague 2000

33. LVPS module prototype(AREM PRO, Praha) Michal Šumbera RECFA- Prague 2000

34. 17 280 PWO crystals 2.2x2.2x18 cm3 coupled to large-area PIN-diodes with low-noise preamps ALICE Photon Spectrometer PHOS PHOS Michal Šumbera RECFA- Prague 2000

35. Scintillation group, Dept. of Optical Crystal, Institute of Physics, Prague • 1995-7: Development and production (in co-operation with Preciosa Crytur Co.) of large PWO blocks (2x2x0cm) which were used in the ALICE beam tests. • 1997-2000: Continuation of beam tests. Testing of absorption properties and scintillation characteri-stics of selected PWO crystals, including detailed studies of various doped crystals. • 2000-2005: Participation in tests, assembly and measurement of characteristics of individual crystals Michal Šumbera RECFA- Prague 2000

36. Transmission spectra at room temperature for three different PWO crystals (L = 18 cm) Michal Šumbera RECFA- Prague 2000