Peter Senger (GSI)

The Compressed Baryonic Matter (CBM) experiment at FAIR

FAIR Meeting Kiev, March 18 2008

Outline:

Scientific mission Experimental and technical challenges Collaboration with Ukraine

Crab nebula: ashes of a core collapse supernova observed in 1054 by Chinese

Discovery of the first pulsar in 1968

Super-dense matter in nature: neutron star

F. Weber J.Phys. G27 (2001) 465

Extreme states of strongly interacting matter

baryons hadrons partons

Compression + heating = quark-gluon matter (pion production)

Neutron stars Early universe

The phase diagram of strongly interacting matter

World-wide experimental (and theoretical) efforts: RHIC-BNL (USA) and LHC-CERN: high temperatures CBM-FAIR: high baryon densities

Messengers from the dense phase ?

U+U 23 AGeV

Experimental challenges

up to 107 Au+Au reactions/sec

determination of (displaced) vertices with high resolution ( 50 m)

identification of leptons and hadrons

Central Au+Au collision at 25 AGeV:URQMD + GEANT4

160 p 400 -

400 + 44 K+ 13 K-

Identification of strange particles in heavy-ion collisions with Silicon Tracking

System

- -

total efficiency 10.6% 2.1% 1.0%

(uds) (dss) (sss)

central Au+Au collisions at 25 AGeV:

Silicon tracker: 2 hybrid pixel (750 µm each), 4 microstrips (400 µm each) Strips with 50 µm pitch and 5o stereo angle full event reconstruction

τ = 317 μm/c

Track reconstruction: • realistic magnetic field, • 2 MAPS, 6 micro-strip detectors• proton identification via TOF

Identification of charmed particles in heavy-ion collisions with Silicon Tracking

SystemD production cross sections from HSDHadronic background from UrQMD

τ = 123 μm/cD0

K-

π+

D0

Dipolmagnet

The Compressed Baryonic Matter Experiment

Ring ImagingCherenkovDetector

Transition Radiation Detectors Resistive

Plate Chambers(TOF)

ECAL

SiliconTrackingSystem

Tracking Detector

Muondetection System

Silicon Tracking System: 1 Mio Strips, radiation hard sensors ultra-light mechanical structure ultra-thin micro-cables, 55 cm long, 100 μm pitch

Cost estimate CBM experiment (as of 2005)

Components cost (k€)

Silicon Pixel Detector (MAPS) 1800

Silicon Microstrip Detector 9220

Ring Imaging Cherenkov Detector (RICH) 5020 - 7320

Transition Radiation Detector (TRD) 8980 - 10630

TOF Stop Detector (TOF-RPC) 7150 – 7770

Electromagn. Calorimeter (ECAL) 9498

Superconducting magnet 2832

Data acquisition and trigger (DAQ) 5500

Computing (Commissioning) 1000

Infrastructure 4950

Sum 55950 – 60520

Added in 2006: Muon detection system 11 Mio euro

Silicon detector development

Detector test board under production at GSI.

New "Technology wafer" under production at CIS: Focus on radiation hardness.

First mechanical module pre-prototypes, INR Kiev.

Cha

rge,

Str

ip ”

k”

Charge, Strip “k+1”

Detector tests at INR Kiev

Analog readout cable, first pre-prototype. SE SRTIIE Kharkov.

55 cm long, 1024 lines, 100 µm pitch55 cm long, 1024 lines, 100 µm pitch

14 µm Al on 10 µm Kapton14 µm Al on 10 µm Kapton

Scientists at GSI from Ukraine (Nat. T. Shevchenko Univ. Kiev):

Iouri Vassiliev (Postdoc) Tetyana Galatyuk (PhD student) Dmitry Kresan (PhD student) Anton Lymanets (PhD student) + sommerstudents

Collaborators in Ukraine:

Prof. Dr. Vyacheslav Borshchov State Enterprise Scientific Research Technological Institute of Instrument Engineering, Kharkov, Ukraine

Prof. Dr. Igor M. Kadenko National Taras Shevchenko University of Kiev

Prof. Dr. Valery M. Pugatch Institute for Nuclear Research, Kiev National Academy of Sciences of the Ukraine

Prof. Dr. Gennady Zinovjev Bogolyubov Institute for Theoretical Physics National Academy of Sciences of the Ukraine

Ukraine in CBM

CBM Collaboration : 51 institutions, ~ 400 membersCroatia: RBI, ZagrebSplit Univ.China:CCNU WuhanUSTC HefeiCyprus: Nikosia Univ. Czech Republic:CAS, RezTechn.Univ.PragueFrance: IPHC StrasbourgHungaria:KFKI BudapestBudapest Univ.

   

Russia:IHEP ProtvinoINR TroitzkITEP MoscowKRI, St. PetersburgKurchatov Inst., MoscowLHE, JINR DubnaLPP, JINR DubnaLIT, JINR DubnaMEPHI MoscowObninsk State Univ.PNPI GatchinaSINP MSU, Moscow St. Petersburg P. Univ.Ukraine: T. Shevchenko Univ. , Kiev

India:Aligarh Muslim Univ.Panjab Univ. Rajasthan Univ.Univ. of Jammu Univ. of KashmirUniv. of CalcuttaB.H. Univ. VaranasiVECC KolkataSAHA KolkataIOP BhubaneswarIlT KharagpurKorea:Korea Univ. SeoulPusan National Univ.Norway:Univ. Bergen

Supported by EU FP6

Germany: Univ. Heidelberg, P.I.Univ. Heidelberg, KIP Univ. FrankfurtUniv. Mannheim Univ. MünsterFZ DresdenGSI DarmstadtPoland:Jag. Univ. KrakowWarsaw Univ.Silesia Univ. KatowiceAGH KrakowPortugal: LIP CoimbraRomania: NIPNE Bucharest

CBM Collaboration Meeting in Strasbourg Sept. 2006