Bericht über CBM an FAIR Physik, Aktivitäten und Realisierung

Transcription

1 Bericht über CBM an FAIR Physik, Aktivitäten und Realisierung Johann M. Heuser GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt für die CBM-Kollaboration Jahrestagung Physikzentrum Bad Honnef

2 Johann M. Heuser - The CBM experiment at FAIR 2 Physics case: Exploring the QCD phase diagram CBM physics program: Equation-of-state at high ρ B Deconfinement phase transition QCD critical endpoint Chiral symmetry restoration Diagnosticprobesof the high-density phase: open charm, charmonia low-mass vector mesons multistrange hyperons flow, fluctuations, correlations Projects to explore the QCD phase diagram at large µ B : RHIC energy-scan, NA61@SPS, MPD@NICA... bulk observables CBM@FAIR... bulk and rare observables

3 Johann M. Heuser - The CBM experiment at FAIR 3 CBM Physics Book Lecture Notes in Physics Vol. 814 December 22, pages, 400 figures, 2000 citations General Introduction Prelude by Frank Wilczek Facets of Matter Executive Summary Part I BULK PROPERTIES OF STRONGLY INTERACTING MATTER Part II IN-MEDIUM EXCITATIONS Part III COLLISION DYNAMICS Part IV OBSERVABLES AND PREDICTIONS Part V CBM EXPERIMENT

4 Johann M. Heuser - The CBM experiment at FAIR 4 FAIR FAIR Modules 0-3: nuclei up to 14 (11) A GeV, Z/A=0.5 (0.4) protons up to 29 GeV HADES + CBM CBM FAIR Module 6: nuclei up to 44 (34) A GeV, Z/A=0.5 (0.4) protons up to 89 GeV CBM Nuclear collisions from 4-45A GeV Electrons, muons, charm, hadrons, photons, exotica. HADES High Acceptance Di-Electron Spectrometer Electrons, hadrons, (photons) Nucl. collisions from 1-10A GeV

5 Johann M. Heuser - The CBM experiment at FAIR 5 Nuclear matter physics at SIS100 energies Nuclear equation-of-state, quarkyonic matter at high densities: What are the properties and the degrees-of-freedom of nuclear matter at neutron star core densities? Hadrons in dense matter: What are the in-medium properties of hadrons? Is chiral symmetry restored at very high baryon densities? Strange matter: Does strange matter exist in the form of heavy multi-strange objects? Heavy flavor physics: How ist charm produced at low beam energies, and how does it propagate in cold nuclear matter? s s d u s u? Λ Λ

6 Johann M. Heuser - The CBM experiment at FAIR 6 Experimental challenges Central Au+Au collision at 25 AGeV 160 p 400 π π + 44 K + 13 K - UrQMD + GEANT high charged-particle multiplicities high nuclear interaction rates fast detectors on-line event selection radiation hard, low-mass tracking & vertex detectors

7 The Compressed Baryonic Matter Experiment Transition Ring Imaging Radiation Detectors Cherenkov Detector Electromagnetic Calorimeter Silicon Tracking System Projectile Spectator Detector (Calorimeter) Micro Vertex Detector Dipole magnet Johann M. Heuser - The CBM experiment at FAIR Resistive Plate Chambers (TOF) 7

8 Johann M. Heuser - The CBM experiment at FAIR 8 The Compressed Baryonic Matter Experiment Muon detection System Silicon Tracking System Tracking Detector Micro Vertex Detector Projectile Spectator Detector (Calorimeter) Dipole magnet Resistive Plate Chambers (TOF)

9 Johann M. Heuser - The CBM experiment at FAIR 9 Silicon Tracking System 8 tracking stations ladder low-mass system radiation hard sensors high spatial resolution pile-up free; self-triggering readout current layout: area, 8 stations: ~ 4 m 2 number of sensors: 1400 number of r/o channels: 2.2 M number of FE chips: ~ number of FE boards: ~ 2100 GSI (Project leader): Sensors, FEE boards, System integration Univ. Tübingen: Module assembly + test AGH Krakow: Front-end chip STS Consortium: GSI, Russia, Ukraine Engineering,...

10 Johann M. Heuser - The CBM experiment at FAIR 10 STS examples of ongoing R&D work front-end electronics n-xyter chip double-sided silicon microstrip detectors GSI CiS Erfurt sensors with thin r/o cable prototype chip TOT2 beam test systems carbon-fiber supports mock-up of a ladder system development

11 Track reconstruction & First-Level Event Selection (FLES) reconstruction efficiency [%] Au+Au collision 25A GeV, central (UrQMD) 96% Frankfurt (V. Lindenstruth) X-Z view <1 % ghost tracks GSI (I. Kisel) [%] p [GeV/c] momentumresolution resolution momentum 1.3% (tracks pointing to primary vertex) X-Y view Johann M. Heuser - The CBM experiment at FAIR p [GeV/c] 11

12 Micro Vertex Detection System K - π + "open charm" measurement e.g. D 0 Kπ pioneering of a novel ultra-low-mass detector system, ~0.1% X 0 per tracking station Two tracking stations in vacuum Thinned monolithic active pixel detectors On ultra-thin thermal carrier and bus system Inst. für Kernphysik, Frankfurt (Group J. Stroth): System development IPHC Strasbourg: Sensor development Johann M. Heuser - The CBM experiment at FAIR 12

13 Johann M. Heuser - The CBM experiment at FAIR 13 MVD examples of ongoing R&D 2-station MVD prototype CVD diamond carrier chip-in-polyamide Sensor integration Station design System Integration study Sensor validation, irradiation study Beam test at CERN SPS DAQ development in synergy with upgrade

14 Johann M. Heuser - The CBM experiment at FAIR 14 Open charm reconstruction STS tracking, MVD vertexing, proton rejection via TOF SIS-300: Au+Au, 25A GeV D 0 K π, cτ= 123 µm centr. ev. eff = 4.4% _ S/B = 6.4 (D 0 ) 2.1 (D 0 ) SIS-100: p+c, 30 GeV D ± + X, D ± Kππ

15 Johann M. Heuser - The CBM experiment at FAIR 15 Time-of-flight measurement Challenges: rates from 1 khz/cm 2 to 20 khz/cm 2 time resolution better 80 ps over 150 m 2 Proposed solutions: Resistive Plate Chambers from new materials: Ceramics (FZD Rossendorf) Semiconductive Glass (China) Demonstrated: Cross talk under control Counter resolutions < 60 ps First realization of a complete readout chain of data driven DAQ with differential RPC (Nov. 2010, test setup at COSY)

16 Johann M. Heuser - The CBM experiment at FAIR 16 R&D towards the full TOF system Contributing institutions: Tsinghua Beijing NIPNE Bucharest GSI Darmstadt USTC Hefei PI Heidelberg KIP Heidelberg INR Moscow ITEP Moscow IHEP Protvino FZD Rossendorf KU Seoul CCNU Wuhan RBI Zagreb Responsibilities of German groups: Project management Ceramic electrodes and high rate counters Strip counter design FEE Amplifier and Discriminator (PADI) Digitizer (GET4) and Clock System: TOF Readout Controller System Integration PI Heidelberg (N. Herrmann) FZD Rossendorf (L. Naumann) PI Heidelberg GSI, PI Heidelberg GSI KIP HD Frankfurt (U. Kebschull) PI Heidelberg

17 Electron identification Rings: ~ 6cm diameter ~ 20 photo electrons finding efficiency 95.3% RICH + TRD: e identification efficiency 85 % π-suppression 10 4 Project lead by german groups: University Gießen, University Wuppertal, GSI, HS Esslingen Johann M. Heuser - The CBM experiment at FAIR 17

18 RICH examples of ongoing R&D work Characterization of H8500 MAPMT Single photon measurement Quantum efficiency, anode uniformity Sensitivity to magnetic field Wave length shifting films, Nov beamtest of proximity focussing setup with quarz radiator at CERN Test of readout electronics Prototype (scalable to CBM RICH) for inbeam tests in Nov under development Characterization of RICH performance TDR in 2012 RICH ready for CBM start version 2018? Johann M. Heuser - The CBM experiment at FAIR 18

19 Johann M. Heuser - The CBM experiment at FAIR 19 TRD detector system 3 TRD stations of 4 layers each 1.2 M channels 1100 m 2 area Institut für Kernphysik, Münster - J. Wessels Institut für Kernphysik, Frankfurt/Main - H. Appelshäuser Institut für Technische Informatik, Heidelberg - P. Fischer Hochschulrechenzentrum, Frankfurt/Main - U. Kebschull National Institute for Physics and Nuclear Engineering, Bucharest - M. Petrovici Joint Institute for Nuclear Research, Dubna - Y. Zanevsky

20 Johann M. Heuser - The CBM experiment at FAIR 20 Recent prototype TRD and FEE developments TRD 444 Münster TRD 336 different gas volume geometries Heidelberg

21 Johann M. Heuser - The CBM experiment at FAIR 21 Detector Test in e-π Beam at CERN/T10, 11/2010 STS RICH 9 TRDs beam

22 Johann M. Heuser - The CBM experiment at FAIR 22 Muon Chambers (MuCh) System J/ψ measurements GEM detectors Fe cm 13.5 λ I 256 pads mm 2 Straw tubes 7.5 λ I low-mass vector meson measurements Developments in India, Russia

23 Johann M. Heuser - The CBM experiment at FAIR 23 Feasibility studies for di-lepton measurements Simulation and analysis tasks lead by GSI. Signal and background yields from physics event generators (HSD, UrQMD) Full event reconstruction based on realistic detector layout and response (CbmRoot) Electrons: 200k events ρ,ω,φ events J/ψ Muons: events events ρ, ω, φ J/ψ, ψ'

24 Johann M. Heuser - The CBM experiment at FAIR 24 German groups in CBM MVD: Institut für Kernphysik, U. Frankfurt J. Stroth STS: GSI J. Heuser Physikalisches Institut, U. Tübingen H.-R. Schmidt (2011) FLES: Inst. Computer Science, FIAS, Frankf. V. Lindenstruth GSI I. Kisel Hochschulrechenzentrum, Frankfurt U. Kebschull (12/2010) FEE-DAQ: ZITI, Heidelberg P. Fischer, U. Brüning, R. Männer GSI W. Müller, C.J. Schmidt TOF: Physikalisches Institut, Heidelberg N. Herrmann FZ Dresden Rossendorf B. Kämpfer TRD: Institut für Kernphysik, Münster J. Wessels Institut für Kernphysik, Frankfurt H. Appelshäuser RICH: 2. Physikalisches Institut, Gießen C. Höhne Fachbereich Physik, Wuppertal K.-H. Kampert Coordination: GSI Spokesperson P. Senger GSI Physics Coordinator V. Friese GSI Technical Coordinator W. Müller GSI Resource Coordinator J. Eschke GSI Infrastructure W. Niebur

25 Generic Timeline Johann M. Heuser - The CBM experiment at FAIR 25

26 CBM Collaboration: 55 institutions, > 400 members 15 th CBM Collaboration Meeting, April 12-16, 2010 at GSI Croatia China Czech Republic France Hungary India Korea Norway Germany Poland Romania Russia Ukraine Johann M. Heuser - The CBM experiment at FAIR 26