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Danish Teachers, CERN, 23 Oct 2007 Børge Svane Nielsen, NBI 1
The primordial ’soup’ of QUARKS and GLUONSCan we make and study it on earth?
The primordial ’soup’ of QUARKS and GLUONSCan we make and study it on earth?
M. Turner Natl. Geog. Mag.
J. Harris, Yale
Our Hadron World: NOW
Quark Gluon Plasma in Universe: t < 10-6 sec
Quark-Gluon Plasma:
OUR PAST
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Searching for the Quark Gluon Plasma: Ultra Relativistic CollisionsSearching for the Quark Gluon Plasma: Ultra Relativistic Collisions
URQMD
H. Stöcker et al
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Do we form a Quark Gluon Plasma?
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The traces of the Little Big Bang
E=Mc2
=>
’Create’ Matter & Antimatte
r
’New Math’
=>
200+200=7000
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Danish Teachers, CERN, 23 Oct 2007 Børge Svane Nielsen, NBI 5
The basic building blocks of nature: the Standard Model
PARTICLES FORCES
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Quark ’Lego’. Explains present complex particles
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2004 Nobel prize:
Theory of QCD
F. Wilczek
D. Gross
H. Politzer
The STRONG force:Quarks are confined
The quark-quark potential
2mqc2
Baryon
Baryon
Meson
Cannot make free quarks
this way
=>
Need short distance,
large density
QGP
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The PHASES of Nuclear Matter
The PHASES of Nuclear Matter
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Brookhaven Natl Lab. New York, USA
BRAHMS
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BRAHMS
The forward experiment BRAHMS
The forward experiment
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12. oktober 2007 Kulturnat Jens Jørgen Gaardhøje, Niels Bohr Institute 12
NYT + others scanNYT + others scan
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Large Hadron Collider (LHC) CERN, Genève, CH.
Large Hadron Collider (LHC) CERN, Genève, CH.
Large Hardron Collider LHC : 27 km
will collide lead nuclei :
Pb + Pb at 2750 AGev+ 2750 AGeV
Maximum available energy for particle production in each collision:
1,114,000 GeV
(= 0,1 mJoule. Each nuclear collision equivalent to 1 mg hitting a wall at 50 km/hr)
But the energy is concentrated in a volume of less than 10 -45 m3 !
Highest ENERGY DENSITY
ever produced.
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ALICE experiment at CERN’s new LHC accelerator will record up to 80 000 particle pr. collision.
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Up to 80.000 particles produced in each collision in ALICE. 10.000 collisions per second, for 15.000.000 seconds each year.
=> Millions of GigaBytes to be stored and analyzed.
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… ready to take first data from the summer 2008. A bientôt…
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HEHI and ALICEHEHI and ALICEThe ALICE TPC laser and FMD detector
TPC laser
FMD
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Danish Teachers, CERN, 23 Oct 2007 Børge Svane Nielsen, NBI 25
TPC laser calibrationTPC laser calibration
20-40 μJ/pulse, 1 mm
266 nm, 100 mJ/pulse, 5 ns pulse, 25 mm1.5 mm
336 laser tracks in TPC
25 mm
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Danish Teachers, CERN, 23 Oct 2007 Børge Svane Nielsen, NBI 26
Optical componentsoutside TPC volumeOptical componentsoutside TPC volume
Optics holders all designed and produced at NBI workshop
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Installation at CERNInstallation at CERN
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Analysis of data from TPC commissioning
Analysis of data from TPC commissioning
Measured side A Design side A
we are starting offline analysis of the laser data to characterize the laser tracks and look at TPC distortions … and preparing to install two lasers and electronics in the ALICE experiment
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FMD: Si strip detectorFMD: Si strip detectorFMD3FMD1 FMD2
3 inner rings: 20 φ sectors, 512 strips2 outer rings: 40 φ sectors, 256 strips Total 51,200 strips
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Silicon sensors and hybridsSilicon sensors and hybridsSensors from Hamamatsu PhotonicsHybrids from Ideas AS, Oslo
Hybrid FEE
VA-ALICE128 channelpreamplifier
Wire bonds
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Module productionModule production
Module gluingModule gluingin Copenhagenin Copenhagen
BondingBondingat CERNat CERN
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Test beam at Astrid ringTest beam at Astrid ring
680 MeV e- beam
5 FMD modules(5120 channels)
Beam test withBeam test with5 complete 5 complete modulesmodules(equivalent to a full(equivalent to a fullinner half-ring)inner half-ring)
Complete read-outComplete read-outchain usedchain used
Digitizer board
RCU board
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Assembly of FMD3 cone and FMD2 at NBI
Assembly of FMD3 cone and FMD2 at NBI
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Assembly of FMD3 cone and FMD2 at NBI
Assembly of FMD3 cone and FMD2 at NBI
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Moving to CERNMoving to CERN
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Installation of FMD3 in ALICEInstallation of FMD3 in ALICE
ALICE seenfrom outside
and inside
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Installation of FMD3 in ALICEInstallation of FMD3 in ALICE
FMD3 day =
Friday, Friday, 13. April 0713. April 07
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FMD in ALICEFMD in ALICE
FMD3 installed and ready
FMD2 to be installed 24 June,FMD1 still to be constructed,… and still lots of cabling and testing before first beam next summer ….
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Let’s go visit
ALICE ……