for the ASYEOS collaboration LNSINFN and Univ of Catania Italy 2038 160611 Current state at high densities EAgt100 MeV Few experimental data on isospin ID: 1043067
Download Presentation The PPT/PDF document "ASY-EOS experiment P. Russotto" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
1. ASY-EOS experiment P. Russotto* for the ASY-EOS collaboration*LNS-INFN and Univ. of Catania, Italy20.38 16/06/11
2. Current state at high densities (E/A>100 MeV): Few experimental data on isospin effects,Few extrapolations, inconsistent with each other, big uncertainties More work necessary on consistency of codesMain example: π-/π+ ratioFerini, at al., NPA 762 (05)Z. Xiao et al., PRL 102 (09)Z.Q. Feng, PLB 683 (2010) NLNLρ NLρδFOPI data, W.Reisdorf et al. NPA781 (2007) 459FOPI data, W.Reisdorf et al. NPA781 (2007) 459197Au+197AuConstraints on the symmetry energy from Heavy-Ion Collisions
3. Pion ratio->High densities: Inconsistent with each other! Understand better mechanism!NLNLrNLrdmodels for symmetry energy (SE)Ferini, at al., NPA 762 (05)Z. Xiao et al., PRL 102 (09)Z.Q. Feng, PLB 683 (2010)Current state at high densities (E/A>100 MeV): Few experimental data on isospin effects,Few extrapolations, inconsistent with each other, big uncertainties More work necessary on consistency of codesMain example: π-/π+ ratioConstraints on the symmetry energy from Heavy-Ion Collisions
4. See Qingfeng Li, J. Phys. G31 1359-1374 (2005) and references thereinSTIFFSOFTMain motivation:symmetry energy at supra-saturation densitiesUrQMD modelUrQMD vs. FOPI data:Au+Au @ 400 A MeVsqueeze-out more sensitive than the directed flow5.5<b<7.5 fmHow to measure?
5. Large Area Neutron Detector (LAND)Th.Blaich et al.,NIM A314 136-154 (1992)Neutrons efficiency>80% (for En>400MeV)No 1,2,3H isotopic discriminationsAdapted from P.Pawloski, IWM2007
6. Large Area Neutron Detector (LAND)neutron and Hydrogen detectionTh.Blaich et al.,NIM A314 136-154 (1992)Adapted from P.Pawloski, IWM2007
7. FOPI/LAND experiment on neutron squeeze out (1991)Y. Leifels et al., PRL 71, 963 (1993)P.Russotto et al., PLB 697 (2011)Au+Au 400 A MeVLAND coverage37°<lab<53°61°<lab<85°Re-analysys of experimental data: see R. Lemmon talks~ 106 Events (b<7.5 fm)
8. /0S() (MeV)p+/p- ratioB.A. Li, et al.Fermi Energy HIC, MSU+/- ratio,Feng, et al. (ImQMD)P.Russotto et al., PLB 697 (2011)
9. Experimental setupASY-EOS experiment carried out May 2011(possible) 1st phase toward FAIR ??? (e.g. 132Sn,106Sn beams)Au+Au @ 400 AMeV96Zr+96Zr @ 400 AMeV 96Ru+96Ru @ 400 AMeV~ 5x107 Events for each systemBeam LineShadow BarTofWallLand(not splitted)targetChimeraKrakow arrayMicroBall
10. Land acceptance in the ASYEOS experiment: better coverage of mid-rapidity33.1<lab<58 deg UrQMD simulationsAu+Au @ 400 AMeVb=5.5-7.5 fm
11. inversion survives acceptance cuts of the experimentv2-pt-zoom-vxxx-exp.jpgv2-pt-zoom-vxxx-exp.jpg33.1<lab<58 deg unfilteredfilteredUrQMD simulationsAu+Au @ 400 AMeVb=5.5-7.5 fm
12. Au+Au @ 400 AMeV5.5<b<7.5 fm0.35<y/yp<0.65v932 23/10/09b<3 fmURQMD simulations
13. Au+Au @ 400 AMeV5.5<b<7.5 fmv932 22/10/090.25<y/yp<0.75b<3 fm
14. LANDWith new TACQUILA (GSI-ASIC) electronic
15. LANDAu+Au @ 400 AMeV
16. CHIMERASiCsI300 μm12 cm8 Rings7-20 deg352 CsI32 Sisee S.Santoro talks
17. Fast (ch)Fast (ch)Slow (ch)E Sil (ch)CHIMERAsee S.Santoro talk
18. Aladin ToF-Wall2 walls (front and rear)96 plastics 2.5X 100 cm < 7°
19. Energy (ch)ToF (ch)Aladin ToF-WallAu+Au @ 400 AMeV
20. blackall charged particlesblue-redused in reaction plane reconstrution (Q vector)ycm>0.1CHIMERAt (CsI) =10 nsE/E (CsI) =10 %NOPB New Conditions 08/10/09Using only , , Z informationpro-ycm-0.1+-0r4-7-dw5-10ns-10de-au-20run-covered.jpegsimulationsAu+Au @ 400 AMeVb=5.5-7.5 fm
21. MicroBall~ 1cm thick CsI4 Rings60-147 deg50 CsI
22. beam>=7°=<20°210 cm140 cm~10 cmMicroBallNot in scale CHIMERA: MicroBall ~ 10:1Au+Au @ 400 AMeV
23. beamCaravaggio et al., Rome (1609)GoliathDavidMichelangelo et al., Florence (1501)
24. Krakow Array35 modulesCoverage: 20.7 - 63.5 deg. Distance from the target: 402 mm. Digitized with 100 MHz, 14 bits Flash ADCs
25. Krakow Arrayhttp://www.gsi.de/informationen/wti/library/scientificreport2010/index.html#PHN-NQM-FOPI
26. V2718TITRISV2718Optical link chimeraV2718RIO3TITRISMBS: Multi Branch SystemVMEEvent builder ChimeraEvent builder MBSTCP/IPTime ordering,sorting,Data storing Global on-line analysisLocal on-line analysisUDP/IPTRIVATitris Bus KaliMera 2.0 libraryVME6U9URemote DAQ serversTrigger busMBS Chimera ReceiverScalersLandTofWallKrakow ArrayMicroBall
27. Analysis is in progress inside FairRoot frameworkcbmroot.gsi.deThe FairRoot framework is fully based on the ROOT system. The user can create simulated data and/or perform analysis with the same framework. Moreover, Geant3 and Geant4 transport engines are supported, however the user code that creates simulated data do not depend on a particular monte carlo engine. The framework delivers base classes which enable the users to construct their detectors and /or analysis tasks in a simple way, it also delivers some general functionality like track visualization. Moreover an interface for reading magnetic field maps is also implemented.
28. Theorycoalescence reproduce full reaction featuresmomentum dependence, mass spltting, in medium cross sectioncodes consistency, codes comparison……Prescriptions:ExperimentsBetter experimentsNew detectorsRadioactive beams……Collaborations!
29. arXiv:0704.2340
30. From M.Di Toro talk at Asy-Eos2010
31. In the ASY-EOS experiment at GSI we tried to measure such (and other) observables……….???ConclusionsSeveral heavy Ion reactions observables have been useful in order to get information on symmetry energy at sub-saturation densities (giant and pigmy dipole resonances, isobaric analogue states and masses, isospin diffusion, n/p ratios, 3H/3He ratio…).Viceversa, more extended data sets and consistency checks (-/+) are needed in order to arrive at firm conclusions at supra-saturation densitiesNeutron-proton elliptic flow is a promising observable……“a good constraint” of symmetry energy at supra-saturation density??????Model predictions consistency ???
32. THANKS to all ASYEOSers!GSI, GermanyGanil, FranceDaresbury, UKLiverpool, UKMilano, ItalyCatania, ItalyMessina, ItalyMSU, USATAMU, USAWMI, USAKrakow, PolandRIKEN, JapanZagreb, CroatiaSantiago, SpainKSU, Saudi Arabia && others…
33. Adapted from P.Pawloski, IWM2007
34.
35. From M.Di Toro talk at Asy-Eos2010
36. See Qingfeng Li, J. Phys. G31 1359-1374 (2005) and references thereinSTIFFSOFTMain motivation:symmetry energy at supra-saturation densities * W. Reisdorf, et al., Nucl. Phys. A 612 (1997) 493.Coalescence condition: Dr <3 fm and Dp< 275 MeV/c*UrQMD vs. FOPI data:Au+Au @ 400 AMeVb< 2.5 fmUrQMD simulations
37. UrQMD vs. FOPI data:Au+Au @ 400 A MeVstiffsoftinversion of neutronand hydrogen flowssqueeze-out more sensitive than the directed flowNeutron and proton elliptic flow5.5<b<7.5 fmZ=1400 AMeV maximum V2A. Andronic et al., Eur. Phys. J. A 30 (2006) 31.How to measure?
38. V2 for |(y/yp)c.m.|<0.1STIFFSOFT=(N-Z)/(N+Z)Au+Au96Zr+96Zr96Ru+96RuURQMD simulations: @ 400 AMeVNTD 13/10/09Au+Au b=5.5-7.5 fm96Zr+96Zr b=4-6 fm96Ru+96Ru b=4-6 fm
39. LAND coverage37°<lab<53°61°<lab<85°
40. Time, charge and space resolutionA. SchüttaufFWHM = 2.35 sAladin ToF-Wall