JINR Contribution to the CBM experiment

1. JINR Contribution to theCBM experiment A.I.Malakhov Joint Institute for Nuclear Research, Dubna malakhov@lhe.jinr.ru Report at the 5th Workshop on the Scientific Cooperation Between German Research Centers and JINR, Dubna, January 17-19, 2005

3. Compressed Barionic Matter (CBM) JINR participation: Transition Radiation Detector (TRD) Straw Transition Radiation Tracker (TRT) Superconducting Dipole Magnet Simulation (tracking, RICH, magnetic field) Physics The present JINR facility NUCLOTRON could be used as a test bench for CBM detectors

4. for the Compressed Baryonic Matter Experiment at the Future Accelerator Facility in Darmstadt The CBM collaboration Darmstadt, January 2004

6. Transition Radiation Detector (TRD) Laboratory of High Energies Leader A.I.Malakhov Superconducting Dipole Magnet Simulation (Track finder, Track fitter) Laboratory of Theoretical Physics Leader D.Blaschke Physics Laboratory of Particle Physics Leader V.D.Peshekhonov Straw Transition Radiation Tracker (TRT) Laboratory of Information Technologies Leader V.V.Ivanov Software (track and pattern reconstruction, RICH, magnetic field)

7. DEVELOPMENT of FAST GAS DETECTORS for TRD Yu. Zanevsky Laboratory of High Energies Joint Institute for Nuclear Research

8. Development and Construction of Transition Radiation Detector for ALICE (JINR Participation)________________________________________________________ Main goal: e/π discrimination of > 100 (p > 1 GeV/c) Position resolution of ~ 200 μm Large area ( 700 m2, 6 layers) Collaboration: Heidelberg, GSI, Munster, Frankfurt, Dubna, Bucharest. Coordinator from JINR - Yu. Zanevsky Main taskof LHE JINR : • Development and construction of 100 Chambers for Transition Radiation Detector • Testing at a laboratory conditions and on the beam at CERN • Detector Commissioning on the beam at CERN At blg. 40 of LHE JINR has been constructed: ■ Rooms (including 3 clean rooms ~120 m2 , class better than 10.000) ■ Climate facility at clean rooms ■ Winding machine under PC control, tables, special tools e.t.c.

9. Development and Construction ofTransition Radiation Detector for ALICE (JINR Participation)________________________________________________________ Winding Machine under operation Transfer of Wire Planes on TRD chambers

10. Development and Construction of Transition Radiation Detector for ALICE (JINR Participation)________________________________________________________ Assembling of TRD chamber Testing of TRD chamber with X-ray tube

11. Tests of prototypes (MWPC, GEM) / July 2004 at SIS /_______________________________________________________ 2 type of Detectors (from LHE JINR) has been tested on the beam at GSI in July 2004 with Ar/CO-2 and Xe/CO-2 gas mixture:1) MWPC (with drift gap) 2 mm anode-cathode gap 8 mm drift gap 2 mm anode pitch 10 x 10 cm ² area PAD readout (3 x 4 mm ²) 2) GEM-3 3 mm drift gap 3 ampl. stages 10 x 10 cm ² area PAD readout (10 x 20 mm ²)

12. The Superconducting Dipole Magnet Borisovskay Z. , Matyushevsky E., Shabunov A. Laboratory of High Energies Joint Institute for Nuclear Research P.G.Akishin Laboratory of Information Technologies Joint Institute for Nuclear Research

13. Superconducting Dipole Magnet Large Aperture 1x1 m2 The field integral 1 Tm The weight of the iron yoke is 67000 kg

14. The CBM Superconducting Dipole Magnet

15. The Possible Variant of Superconducting Dipole Magnet

16. Track finder for STSwith conformal mapping O. Rogachevsky Laboratory of High Energies Joint Institute for Nuclear Research

20. CBM STRAW TRANSITION RADIATION DETECTOR/TRACKER (TRT) V.Peshekhonov Laboratory of Particle Physics Joint Institute for Nuclear Research

21. CBM STRAW TRT Target-Detector distance: 1-st module - 4 m 2-d - 6 m 3-d - 8 m Angle Acceptance – from 50 mrad to 500 mrad Sensitive area X(horizontal) x Y(vertical) for 1-st, 2-d, 3-d module: ~ (5.8 x 3.9) m2; (8.7 x 5.8) m2;(11.6 x 7.7) m2 Space Resolution - < 200 mkm Rejection of electrons from pions ~ 300 V.Peshekhonov 2 03.10.2004

22. Software (track and pattern reconstruction, RICH, magnetic field) V.V. Ivanov Laboratory of Information Technologies Joint Institute for Nuclear Research

23. 3D track recognition by the track-following method (G.Ososkov, A.Airiyan, A.Lebedev, S.Lebedev) • Accurate momentum restoration based on orthogonal polynomial sets (E.P.Akishina, V.V.Ivanov, E.I.Litvinenko) • Application of Kalman filter for momentum restoration (S.A.Baginyan, V.V.Ivanov, P.V.Zrelov) • Polynomial approximation in a problem of accurate momenta reconstruction (P.G.Akishin) • RICH ring guidance by the Hough transform approach charged particle tracing through inhomogeneous (B.Kostenko,G.Ososkov, A.Solovjev) • Looking for the STS “secondary” tracks (V.Ivanov,G.Ososkov, A.Airiyan)

24. General topics which can be covered by Laboratory of Theoretical Physics in CBM program D.Blaschke

25. Hadron masses/decays in chiral quark/qluon models (M.Ivanov, M.Volkov) • Hadron-hadron cross sections including D-meson properties and J/ψ breakup (D.Blaschke, M.Ivanov, N.Kochelev) • Hadrons in hot, dencse matter including in-medium  mesons (M.Volkov, V.Yudichev, D.Blaschke, E.Kuraev, A.Radzhabov) • Equation of state and QCD phase diagram (D.Blaschke, V.Toneev, V.Yudichev, Khvorostukhin) • Kinetics and hydrodynamics of heavy-ion collisions with application to analysis of various hadronic and photon/lepton observables (V.Toneev, V.Skokov) • Relativistic effects in hadron-nucleus scattering (S.Bondarenko, V.Burov, V.Chabanov)

26. Total cost in 2005 (funding required from BMBF ):