Transcript CBM at FAIR
CBM at FAIR Walter F.J. Müller, GSI 5th BMBF-JINR Workshop, 17-19 January 2005 Outline Physics Experiment 17-19 January 2005 physics case observables requirements challenges 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 2 States of strongly interacting matter baryons Compression + hadrons heating partons = quark-gluon plasma (pion production) Neutron stars 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI Early universe 3 Phase diagram of strongly interacting matter Freeze-out points calculated from measured particle ratios using the statistical model baryon density: B 4 ( mT/2h2c2)3/2 x [exp((B-m)/T) - exp((-B-m)/T)] baryons - antibaryons Lattice QCD calculations: Fedor & Katz, Ejiri et al. dilute: B 0.04 fm-3 0.24 0 dense: B 1.0 fm-3 6.2 0 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 4 Probing matter at high densities Trajectories calculated by a 3-fluid hydrodynamics model Toneev & Ivanov 30 AGeV trajectory close to critical endpoint 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 5 The future Facility for Antiproton an Ion Research (FAIR) SIS 100 Tm SIS 300 Tm U: 35 AGeV p: 90 GeV 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI Compressed Baryonic Matter 6 Phase diagram of strongly interacting matter CERN-SPS, RHIC, LHC: high temperature, low baryon density GSI SIS300: moderate temperature, high baryon density 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 7 States of strongly interacting matter “Strangeness" of dense matter ? In-medium properties of hadrons ? of nuclear 17-19 January 2005 Compressibility 5th BMBF-JINR Workshop,matter? Walter Müller, GSI densities ? Deconfinement at F.J. high baryon 8 CBM Physics Topics and Observables In-medium modifications of hadrons onset of chiral symmetry restoration at high ρB measure: , , e+eopen charm (D mesons) Strangeness in matter enhanced strangeness production measure: K, , , , Indications for deconfinement at high ρB anomalous charmonium suppression ? measure: J/, D Critical point event-by-event fluctuations Color superconductivity precursor effects ? 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 9 Low-mass dileptons: Pb+Au@40 AGeV CERES Collaboration 17-19 January 2005 S. Damjanovic and K. Filimonov, nucl-ex/0109017 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 10 Meson production in central Au+Au W. Cassing, E. Bratkovskaya, A. Sibirtsev, Nucl. Phys. A 691 (2001) 745 SIS18 17-19 January 2005 SIS100/ 300 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 11 Open Charm detection D meson production in pN collisions Some hadronic decay modes D (c = 317 m): D+ K0+ (2.90.26%) D+ K-++ (9 0.6%) D0 (c = 124.4 m): D0 K-+ (3.9 0.09%) D0 K-+ + - (7.6 0.4%) Measure displaced vertex with resolution of 30 μm ! 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 12 CBM Setup Radiation hard Silicon pixel/strip detectors in a magnetic dipole field Electron detectors: RICH & TRD & ECAL: pion suppression up to 105 Hadron identification: RPC, RICH Measurement of photons, π0, η, and muons: ECAL 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 13 CBM Technical Status Report 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 14 CBM Collaboration : 42 institutions, 14 countries Croatia: RBI, Zagreb Hungaria: Russia: KFKI Budapest CKBM, St. Petersburg Eötvös Univ. Budapest IHEP Protvino Cyprus: INR Troitzk Korea: Nikosia Univ. ITEP Moscow Korea Univ. Seoul KRI, St. Petersburg Pusan National Univ. Czech Republic: Kurchatov Inst., Moscow Czech Acad. Science, Rez LHE, JINR Dubna Norway: Techn. Univ. Prague LPP, JINR Dubna Univ. Bergen LIT, JINR Dubna France: LTP, JINR Dubna Poland: IReS Strasbourg MEPhi, Moskau Krakow Univ. Obninsk State Univ. Warsaw Univ. Germany: PNPI Gatchina Univ. Heidelberg, Phys. Inst. Silesia Univ. Katowice SINP, Moscow State Univ. Univ. HD, Kirchhoff Inst. St. Petersburg Polytec. U. Portugal: Univ. Frankfurt Spain: LIP Coimbra Univ. Kaiserslautern Santiago de Compostela Univ. Mannheim Univ. Romania: Univ. Marburg Ukraine: NIPNE Bucharest Univ. Münster Shevshenko Univ. , Kiev FZ Rossendorf Univ. of Kharkov GSI Darmstadt CBM & Дубна From first page of CBM Collaboration List 4 Labs 38 Persons 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 16 Experimental Challenges Central Au+Au collision at 25 AGeV: URQMD + GEANT4 160 p 360 41 K+ 330 + 360 0 13 K- 107 Au+Au reactions/sec (beam intensities up to 109 ions/sec, 1 % target) determination of (displaced) vertices with high resolution ( 30 m) identification of electrons and hadrons 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 17 Pion misidentification a)0% b)0.01% c)0.1% d)1% 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 18 Experimental Conditions Hit rates for 107 minimum bias Au+Au collisions at 25 AGeV: Rates of > 10 kHz/cm2 in large part of detectors ! main thrust of our detector design studies 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 19 CBM DAQ Requirements Profile D and J/Ψ signal drives the rate capability requirements D signal drives FEE and DAQ/Trigger requirements Problem similar to B detection, see BTeV, LHCb Adopted approach: displaced vertex 'trigger' in first level, like in BTeV Additional Problem: DC beam → interactions at random times → time stamps with ns precision needed → explicit event association needed Current design for FEE and DAQ/Trigger: Self-triggered FEE: All hits shipped with time stamp Data-push architecture: L1 trigger throughput limited but not latency limited 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI Substantial R&D needed Quite different from the usual LHC style electronics 20 Conventional FEE-DAQ-Trigger Layout Especially instrumented detectors Detector L0 Trigger fbunch Trigger Primitives FEE Dedicated connections Buffer Limited capacity Modest bandwidth L2 Trigger Archive 17-19 January 2005 Standard hardware L1 Accept DAQ Cave Limited L1 trigger latency 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI Shack L1 Trigger Specialized trigger hardware 21 The way out: use Data Push Architecture Detector Self-triggered front-end Autonomous hit detection fclock FEE No dedicated trigger connectivity All detectors can contribute to L1 Cave Large buffer depth available System is throughput-limited and not latency-limited High bandwidth DAQ L1 Select FPGA and CPU mix L2 Select 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI Shack Modular design: Few multi-purpose rather many special-purpose modules 22 Toward Multi-Purpose FEE Chain PreAmp Si Strip Pad GEM's PMT APD's pre Filter AntiAliasing Filter ADC Sample rate: 10-100 MHz Dyn. range: 8...>12 bit digital Filter 'Shaping' 1/t Tail cancellation Baseline restorer Hit Finder Hit parameter estimators: Amplitude Time Backend & Driver Clustering Buffering Link protocol All potentially in one mixed-signal chip 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 23 CBM DAQ and Online Event Selection Data flow: ~ 1 TB/sec 1st level selection: ~ 1 Pops Data flow: ~ 1 GB/sec 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 24 CBM R&D working packages Design & construction of detectors Feasibility studies Simulations Framework GSI Tracking KIP Univ. Heidelberg Univ. Mannheim JINR-LHE Dubna JINR-LIT Dubna Ring finder ,ω, e+eUniv. Krakow JINR-LHE Dubna J/ψ e+eINR Moscow GSI J/ψ μ+μ- JINR-LIT, Dubna PNPi St. Petersburg SPU St. Petersburg π, K, p ID D Kπ(π) Silicon Pixel IReS Strasbourg Frankfurt Univ., GSI Darmstadt, RBI Zagreb, Univ. Krakow Silicon Strip Moscow State Univ CKBM St. Petersburg KRI St. Petersburg Univ. Obninsk RPC-TOF MWPC TRD JINR-LHE, Dubna GSI Darmstadt, Univ. Münster NIPNE Bucharest Straw TRD JINR-LPP, Dubna FZ Rossendorf FZ Jülich Tech. Univ. Warsaw ECAL KIP Univ. Heidelberg Univ. Mannheim GSI Darmstadt JINR-LIT, Dubna Univ. Bergen KFKI Budapest Silesia Univ. Katowice Warsaw Univ. ITEP Moscow GSI Darmstadt Univ. Krakow LIP Coimbra, GSI Darmstadt, Univ. Santiago Czech Acad. Sci., Rez Univ. Heidelberg, Techn. Univ. Prague GSI Darmstadt, Warsaw Univ. IHEP Protvino NIPNE Bucharest GSI Darmstadt INR Moscow FZ Rossendorf PNPi St. Petersburg IHEP Protvino SPU St. Petersburg ITEP Moscow JINR-LHE, Dubna 17-19 January 2005 5th BMBF-JINR RBI ZagrebWorkshop, Walter GSI Darmstadt Univ. Marburg F.J. Müller, GSI Heidelberg Univ, Warsaw Univ. Kiev Univ. NIPNE Bucharest INR Moscow FEE, DAQ, Online Event Selection, Computing RICH Theory: JINR-LTP, Dubna Λ, Ξ,Ω Magnet 25 CBM – Event Reconstruction & Analysis LHE LIT LIT LHE LIT LIT LHE LIT LIT LIT • Track finding •Hough transform •Cellular automaton •Conformal mapping •3D track following • Track fitting •Kalman filter •Kalman filter (projections) •Parabolic approximation •Polynomial approximation •Orthogonal polynomial set • Primary vertex fitting •Minimization of impact parameters •Geometrical Kalman filter • Secondary vertex fitting •Geometrical Kalman filter •Mass and topological constrained fit • RICH ring finding •Track extrapolation •Hough transform •Elastic net •Robust fitter 17-19 January 2005 LHE LHE 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI • Analysis •....... •Λ-Analysis •low-mass dileptons •....... 26 CBM – Magnet Design (LHE) 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 27 CBM – Fast Detectors (LHE) Joint test beam at GSI in July '04 2 chambers from Dubna 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 28 CBM – Straw based TRD (LPP) 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 29 Experimental program of CBM: Observables: Penetrating probes: , , , J/ (vector mesons) Strangeness: K, , , , , Open charm: Do, D Hadrons ( p, π), exotica Detector requirements Large geometrical acceptance good hadron and electron identification excellent vertex resolution high rate capability of detectors, FEE and DAQ Systematic investigations: A+A collisions p+A collisions p+p collisions Beam energies from 8 to 45 (35) AGeV, Z/A=0.5 (0.4) from 8 to 90 GeV e+e- ? from 8 to 90 GeV up to 8 AGeV: HADES Large integrated luminosity: High beam intensity and duty cycle, 17-19 Available January 2005 5th BMBF-JINR Walter F.J. Müller, GSI for several monthWorkshop, per year 30 Stay tuned for Part II by Prof. A. Malakhov 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 31 17-19 January 2005 5th BMBF-JINR Workshop, Walter F.J. Müller, GSI 32