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

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

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

5 TaskInstitution Feasibility study D-Meson identificationGSI Darmstadt, Czech Acad. Science Rez, Techn. Univ. Prague Feasibility study low-mass vector meson identification via dilepton pairs Univ. Krakow, JINR-LHE Dubna Feasibility study charmonium identificationINR Moscow Simulations hadron identification via TOFHeidelberg Univ., Kiev Univ., NIPNE Bucharest, INR Moscow, RBI Zagreb Simulation toolsGSI Darmstadt TrackingKIP Univ. Heidelberg, Univ. Mannheim, JINR-LHE Dubna, JINR-LIT Dubna Silicon Pixel DetectorIReS Strasbourg, Frankfurt Univ., GSI Darmstadt, RBI Zagreb, Krakow Univ., Silicon Strip DetectorSINP Moscow State Univ., CKBM St. Petersburg, KRI St. Petersburg R&D on RPC TOF detector system with read-out electronicsLIP Coimbra, Univ. Santiago de Compostela, Univ. Heidelberg, GSI Darmstadt, NIPNE Bucharest, INR Moscow, FZR Rossendorf, IHEP Protvino, ITEP Moscow, Korea Univ. Seoul, RBI Zagreb, Univ. Krakow, Univ. Marburg R&D on fast gaseous detectors for TRDJINR-LHE Dubna, GSI Darmstadt, Univ. Münster, PNPI St. Petersburg, NIPNE Bucharest R&D on straw tube tracker (TRD)JINR-LPP Dubna, FZR Rossendorf R&D on Ring Imaging Cherenkov Detector (RICH): mirror and UV detector IHEP Protvino, GSI Darmstadt, PNPI St. Petersburg R&D on RICH radiator gas systemPusan Nat. Univ. Design and construction of an electromagnetic calorimeter (ECAL) ITEP Moscow, Univ. Krakow, Univ. Frankfurt Diamond microstrip detectorGSI, Univ. Mannheim Trigger and Data AcquisitionKIP Univ. Heidelberg, Univ. Mannheim, JINR LIT Dubna, GSI Darmstadt, Univ. Bergen, KFKI Budapest, Silesia Univ. Katowice, PNPI St. Petersburg, Univ. Warsaw Design of a superconducting dipole magnetJINR-LHE Dubna, GSI Darmstadt Calculation of radiation dosesKiev Univ. Modification of HADES for 8 AGeVCzech Acad. Science Rez Delta electronsGSI Darmstadt

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

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) ________________________________________________________ Collaboration: Heidelberg, GSI, Munster, Frankfurt, Dubna, Bucharest. Coordinator from JINR - Yu. Zanevsky Main task of 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 m 2, class better than ) ■ Climate facility at clean rooms ■ Winding machine under PC control, tables, special tools e.t.c. Main goal: e/π discrimination of > 100 (p > 1 GeV/c) Position resolution of ~ 200 μm Large area (  700 m2, 6 layers)

9 Development and Construction of Transition Radiation Detector for ALICE (JINR Participation) ________________________________________________________ Winding Machine under operationTransfer 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 Borisovskay Z., Matyushevsky E., Shabunov A. The Superconducting Dipole Magnet 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 m 2 The field integral 1 Tm The weight of the iron yoke is kg

14 The CBM Superconducting Dipole Magnet

15 The Possible Variant of Superconducting Dipole Magnet

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

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

21 CBM STRAW TRT V.Peshekhonov 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) m 2 ; (8.7 x 5.8) m 2 ; (11.6 x 7.7) m 2 Space Resolution - < 200 mkm Rejection of electrons from pions ~ 300

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

25 1.Hadron masses/decays in chiral quark/qluon models (M.Ivanov, M.Volkov) 2.Hadron-hadron cross sections including D-meson properties and J/ψ breakup (D.Blaschke, M.Ivanov, N.Kochelev) 3.Hadrons in hot, dencse matter including in-medium  mesons (M.Volkov, V.Yudichev, D.Blaschke, E.Kuraev, A.Radzhabov) 4.Equation of state and QCD phase diagram (D.Blaschke, V.Toneev, V.Yudichev, Khvorostukhin) 5.Kinetics and hydrodynamics of heavy-ion collisions with application to analysis of various hadronic and photon/lepton observables (V.Toneev, V.Skokov) 6.Relativistic effects in hadron-nucleus scattering (S.Bondarenko, V.Burov, V.Chabanov)

26 Total cost in 2005 (funding required from BMBF ): Materials and equipment for R&D of fast gas detectors 36.0 k€ Materials and equipment for straw tube tracker prototype 22.0 k€ Computers for development of Level-1 trigger 18.0 k€ Scientific missions 14.0 k€ Sum 90.0 k€