14 February 2008V.Kekelidze, Workshop at IHEP1 MPD MPD MPD MultiPurpose Detector ( ) . , 14 February 2008V.Kekelidze, Workshop at IHEP2 , : - , - , - , - . - 1 238 (U 92+ ) - S NN = 3-9 GeV , ( , .) 14 February 2008V.Kekelidze, Workshop at IHEP3 Physics motivation 14 February 2008V.Kekelidze, Workshop at IHEP4 Physics motivation The phase diagram in terms of the reduced energy density The trajectories calculated with hybrid model o open markers: QGSM steps: 0.3 fm/c & 0.5 fm/c filled markers: evolution within 3D relativistic hydrodynamics 14 February 2008V.Kekelidze, Workshop at IHEP5 MPD Collider NICA complex allocation 14 February 2008V.Kekelidze, Workshop at IHEP6 Collider NICA parameters 14 February 2008V.Kekelidze, Workshop at IHEP7 dedicated experiments Fixed target experiments NA61 at SPSCERN and CBM at SIS100/300 GSI advantages of collider experiments: possibility to have 4 acceptance ! energy scan do not introduce significant variation on critical density of detected particles Collider experiments running at high energies: STAR & Fenix at RHIC BNL, ALICE at LHC CERN STAR plans to run at low energies ( S NN = 4-9 GeV, for U 92+ ) Problem: luminocity falls down 14 February 2008V.Kekelidze, Workshop at IHEP8 Event-by-event fluctuation in hadron productions (multiplicity, Pt etc.) HBT correlations indicating the space-time size of the systems involving , K, p, (possible changes close to the de-confinement point) Directed & elliptic flows for various hadrons Multi-strange hyperon production: yield & spectra (the probes of nuclear media phases) Experimental Tasks the first stage targets the effects to be studied on energy & centrality scanning: 14 February 2008V.Kekelidze, Workshop at IHEP9 longitudinal (z-axis) space limited by ~ 800 cm between collider optics radial scale limited by engineering problems & cost (R < 200 cm) Initial constrains: MPD conceptual design Solution: compact solenoid with major parts of detector working in the magnetic field design of superconducting magnet with closed yoke geometry to provide homogeneous magnetic field 14 February 2008V.Kekelidze, Workshop at IHEP10 ~ 450 First stage of simulation based on UrQMD & GEANT4 in the framework of MPD-Root shell: Au+Au collisions with total energy of AGeV Central interaction within b: 0 3 fm Minimum bias within b: 0 15.8 fm Collision rate at L=10 27 cm -2 s -1 : ~ 6 kHz Observables all B=0 = 0.4 GeV/c central collision || 100 MeV/c charged particle multiplicity (primary) momentum spectrum 14 February 2008V.Kekelidze, Workshop at IHEP11 Pseudorapidity spectra Observables 14 February 2008V.Kekelidze, Workshop at IHEP12 Charged particles Multiplicity Observables 14 February 2008V.Kekelidze, Workshop at IHEP13 General View MPD conceptual design 14 February 2008V.Kekelidze, Workshop at IHEP14 limited by collider optics 2700 MPD conceptual design basic geometry preliminary Defined as a compromise between: -TOF requirement -tracker resolution - magnetic field formation - the cost 14 February 2008V.Kekelidze, Workshop at IHEP15 Magnenic field superconducting solenoidal magnet magnetic field 0.5 T cryostat inner radius ~ 1.5 m (region available for the detector) iron yoke is used to form a homogeneous magnetic field color step 5 Gauss (~1 pm) - good homogeneity feasible for TPC 14 February 2008V.Kekelidze, Workshop at IHEP16 Magnetic field MPD conceptual design 14 February 2008V.Kekelidze, Workshop at IHEP17 MPD conceptual design Towards 4p acceptance: to cover a wide pseudorapidity range 14 February 2008V.Kekelidze, Workshop at IHEP18 Major tracker - TPC + Inner Tracker - silicon strip detector / micromegas chamber for tracking close to the interaction region + Outer Tracker straw barrel (optional) Time Of Flight RPC (+ start/stop sys.) for charged particle ID ECAL shashlyk type - for e, , 0 reconstruction MPD MPD Barrel part tracking, precise momentum measurement & particle ID in the region -1 < 1 + reaction plane determination 14 February 2008V.Kekelidze, Workshop at IHEP34 ECT straw wheels occupancy /straw < 15 % 14 February 2008V.Kekelidze, Workshop at IHEP35 ECT straw wheel Stereo wheel construction: each stereo wheel contains 4 layers of radial straws with different orientation 14 February 2008V.Kekelidze, Workshop at IHEP36 ECT straw wheel Number of track hits = f(R) is related to reconstruction efficiency Pseudorapidity correlation with track hit numbers 14 February 2008V.Kekelidze, Workshop at IHEP37 Track reconstruction efficiency TPC ECT ECT complements TPC to extend pseudorapidity range 14 February 2008V.Kekelidze, Workshop at IHEP38 Pseudorapidy region: 1.5 4.5 (out of the TPC acceptance) usable for centrality /min bias triggers Beam Beam Counter small tiles - within 12 cm diameter, large tiles x 4 larger. R= 110 cm Expected number of charged track accepted vs. impact parameter (Hijing predictions). 14 February 2008V.Kekelidze, Workshop at IHEP39 INR RAN measurement of centrality: b ~ A - Nspect selection of centrality at trigger level measurement of event-by-event fluctuations to exclude the fluctuation of participants monitor of beam intensity by detecting the neutrons from electromagnetic dissociation e / h = 1 - compensated calorimeter Lead / Scintillator sandwich Zero Degree Calorimeter 14 February 2008V.Kekelidze, Workshop at IHEP40 Full beam intensity. -minimum 16 modules. Zero Degree Calorimeter X Z Beam hole 14 February 2008V.Kekelidze, Workshop at IHEP41 DAQ & Computing events ~ disk space TB PCs ~ 1800 14 February 2008V.Kekelidze, Workshop at IHEP42 Engineering + auxiliaries Require essential reconstruction of the intersection area to provide access for works & for necessary auxiliaries 14 February 2008V.Kekelidze, Workshop at IHEP43 Cost Estimation in k$ (very preliminary) Magnet TPC IT (SSD /MM) / 750 OT TOF ECAL (shashlyk / crystal) / ECT BBC TDAQ ZDC Slow Control Computing Engineering _________________ _________ Total 14 February 2008V.Kekelidze, Workshop at IHEP44 At first approximation - all sub-detectors could be designed & constructed at JINR based on the existing expertise & infrastructure some sub-detectors could have alternative designs in order to provide possibility for potential collaborators to substitute/accomplish corresponding groups in future The first realistic draft of the Letter of Intent & the rough cost estimation =- are available MPD organizational aspects 14 February 2008V.Kekelidze, Workshop at IHEP45 Joint Institute for Nuclear Research Institute for Nuclear Research Russian Academy of Science Bogolyubov Institute for Theoretical Physics, NASUk Nuclear Physics Institute of MSU, RF Institute of Allied Physics, Academy of Science Moldova __________///________ open for extension MPD Collaboration A consortium involving GSI, JINR & other centers for IT module development & production is at the organizational stage 14 February 2008V.Kekelidze, Workshop at IHEP46 MPD Collaboration 14 February 2008V.Kekelidze, Workshop at IHEP47 (Letter of Intent) - - - R & D, ( ) , 14 February 2008V.Kekelidze, Workshop at IHEP48 Spin Program at NICA in preparation 14 February 2008V.Kekelidze, Workshop at IHEP49 Spare 14 February 2008V.Kekelidze, Workshop at IHEP50 Possible indication on phase transition measurements of related yields for charged kaons & pions Some enhancement is indicated in the energy region around ~ = 30 14 February 2008V.Kekelidze, Workshop at IHEP51 Physics motivation 14 February 2008V.Kekelidze, Workshop at IHEP52 momentum spectra for various particles ++ -- K+K+ K-K GeV/c Observables 14 February 2008V.Kekelidze, Workshop at IHEP53 Relative yield of Charged kaons Observables 14 February 2008V.Kekelidze, Workshop at IHEP54 Elliptic flow, v 2 Observables 14 February 2008V.Kekelidze, Workshop at IHEP55 In-medium properties of hadrons & nuclear matter equation of state will be studied including a search for possible manifestation of de-confinement and/or chiral symmetry restoration, phase transition, mixed phase & critical end-point in collisions of heavy ion (over atomic mass range A = 1-238) by scanning of the energy region S NN = 3-9 GeV These investigations are relevant for understanding of the physics of heavy ion collisions, the evolution of the Early Universe & formation of the neutron stars. Physics motivation