The new accelerator complex at GSI Per-Erik Tegnér, Nuclear Physics SU
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Transcript of The new accelerator complex at GSI Per-Erik Tegnér, Nuclear Physics SU
The new accelerator complex at GSIPer-Erik Tegnér, Nuclear Physics SU
Nuclear Structure Physics
Hadron Physics
Nuclear Matter Physics
Atomic Physics
Plasma Physics
Applications
HistoryCostsTime scheduleThe accelerators and physicsHigh-energy antiprotons, PANDA
Lots of info on: www.gsi.deConceptual Design ReportMaterial from “Second international workshop on the future accelerator facilityfor beams of ions and antiprotons”, October 2003 (H. Geissel, M. Steck, N. Angert, R. Hayano …)PANDA Letter of Intent
History
Present GSI: UNILAC (linear accelerator) 1975SIS18 (synchrotron 18 Tm) 1990ESR (experimental storage ring) 1990
New elements Z=107 - 112New radioactive isotopesPrecise mass measurements of radioactive isotopesRadiation therapy with carbon ions
Parallel operation
Highest Beam IntensitiesBrilliant Beam QualityHigher Beam EnergiesHighest Beam PowerParallel Operation
GSI Conceptual Design Report to the German Research Council: november 2001XFEL and GSI were recommended: end of 2002Minister Bulmahn announced her decision to support 4 projects: Magnet Lab at Dresden, stratospheric air plane, XFEL and GSI: februari 2003
Cost GSI: Building and infrastructure 225 MEURAccelerator 265 MEURExp. stations and detectors 185 MEUR
TOTAL 675 MEUR
To be shared 65/10/25% between German Government, State of Hessen and partners from outside Germany.
SCHEDULE
2010-2011
The new accelerator complexThe central machines SIS100/300
SIS100: 100Tm, primary beamsIntense pulsed (50 ns, 2-4 Hz)Uranium 28+, 1012 ions/pulse1 GeV/nucleonProtons, 2.5×1013 /pulse, 29 GeV
SIS300(200): primary beams“continuous” beams Uranium 92+, 34 GeV/nucleon
Collecting secondary beamsCooling to good beam qualityDecelerationStoring - experiments
The “old” machines UNILAC andSIS18 used as injectors.
Physics with primary beamsPlasma physicsAtomic physicsNuclear matter physics
Plasma physics
Intense ion beams, short pulses (50ns) up to 12000 GW/gSIS100
Ion beams from the “old” SIS18 andlaser pulses from PHELIX serve as diagnostic tools.
Dense plasmas
Atomic physics with highly charged ions
QED in extreme static fieldsin extremely strong dynamical fields
Atomic physics group at SU
Nuclear matter at extreme conditions
Heavy ions around 30 GeV/nucleonSIS18 - SIS100 - SIS300, 109 per sec
Equation of state, quark-gluon plasmaNeutron stars
Secondary beams
Rare isotope beams (RIB)(Beams of shortlived (radioactive) nuclei)
Intensity increase factor of 10000 relative to presentNuclear structure physics
Atomic physics
Antiproton beamsNew at GSI, high intensity, good quality
Hadron physicsAtomic physics
Geissels nuklidkarta
Physics with radioactive (exotic) nuclei
N
Z
Radioactive ion beams
Super FRS
SIS100
Production of radioactive isotopes
Selecting isotopes
Expected production rates
Low-energy and stopped beams
Gamma-ray spectroscopy, AGATA (Nuclear Physics, KTH)
Ion and atom traps
Stored radioactive beams
Precision mass, half-life, measurementsElastic and in-elastic electron scattering
740 MeV/u, dp/p=2.5%
740 MeV/u, dp/p=0,05%
740 - 100 MeV/u, dp/p=0,05%
4 - 740 MeV/u, dp/p=10-6
Electron ring 200 - 500 MeV
Electron coolingGas target, electron target
Antiproton beams
SIS100/300
HESR
NESRCR/RESR
pbar target
NESR
FLAIR
Antiprotons
3 GeV, dp/p=0,1%
0.8 - 3 GeV, dp/p=0,05%108 - 1011 stored antiprotons
30 MeV
30 - 0.3 MeVdown to 20 keV
FLAIRCRYRING?
3 GeV, dp/p=3%
Physics with low-energy antiprotons, examplesdown to 20 keV at FLAIRcooled beam
Antihydrogen spectroscopyAntiprotonic atoms
High-energy antiprotonsSIS100-pbar prod-CR-RESR-SIS100-HESR
HESR
number of protons stored 1011
Electron cooler: Energy resolution about 100 keV (dp/p = 7×10-6 )Hydrogen target (cluster, pellet): Luminosity 2×1032 cm-2 s-1 (TSL, Uppsala)Nuclear targetsDetector: PANDA
Design involves The Svedberg Lab (Uppsala) and MSL (Stockholm)
Some physics topics:
ConfinementThe mass of hadrons
Glueballs
Experimental studies:
Charmonium (cc-bar) spectroscopyPrecision measurements of mass, width and decay branches. Precise due to beam energy resolution.
Search for predicted gluonic excitationsin the charmonium mass range (3 - 5 GeV/c2).
Meson properties in the nuclear medium
Single and double hypernucleiPrecision gamma-ray spectroscopyhyperon-nucleon, hyperon-hyperon interactions
and more …
Requirements for a detector
Detection of lepton pairsGood kaon identificationDetection of low-energy photonsGood vertex recognition
must withstand large radiation doses (especially using nuclear targets)
Target: pellet, wire,fiber
Micro vertex detector (MVD)Silicon pixel
Tracking detectorsStraw tube, Mini drift chambers
Internally reflected Cherenkovdetectors (DIRC)
Muon counters
Electromagnetic calorimeterLead-tungsten scintillators
OUTLINE OF PANDA
PANDA has to be modular
Nuclear physics groups at SU and KTH
The PANDA collaboration
Letter-of-intent january 200443 universities, institutes (or university departments)250 researchers