ASYEOS experiment P Russotto for the ASYEOS collaboration

  • Slides: 40
Download presentation
ASY-EOS experiment P. Russotto* for the ASY-EOS collaboration *LNS-INFN and Univ. of Catania, Italy

ASY-EOS experiment P. Russotto* for the ASY-EOS collaboration *LNS-INFN and Univ. of Catania, Italy 20. 38 16/06/11

Current state at high densities (E/A>100 Me. V): • Few experimental data on isospin

Current state at high densities (E/A>100 Me. V): • Few experimental data on isospin effects, • Few extrapolations, inconsistent with each other, big uncertainties • More work necessary on consistency of codes • Main example: π-/π+ ratio Ferini, at al. , NPA 762 (05) from Heavy-Ion Collisions Z. Q. Feng, PLB 683 (2010) Z. Xiao et al. , PRL 102 (09) Constraints on the symmetry energy 197 Au+197 Au NLρδ NLρ NL FOPI data, W. Reisdorf et al. NPA 781 (2007) 459

Current state at high densities (E/A>100 Me. V): • Few experimental data on isospin

Current state at high densities (E/A>100 Me. V): • Few experimental data on isospin effects, • Few extrapolations, inconsistent with each other, big uncertainties • More work necessary on consistency of codes • Main example: π-/π+ ratio Pion ratio->High densities: Inconsistent with each other! Understand better mechanism! Ferini, at al. , NPA 762 (05) from Heavy-Ion Collisions Z. Q. Feng, PLB 683 (2010) Z. Xiao et al. , PRL 102 (09) Constraints on the symmetry energy NL NL d NL models for symmetry energy (SE)

Main motivation: symmetry energy at supra-saturation densities Ur. QMD model Ur. QMD vs. FOPI

Main motivation: symmetry energy at supra-saturation densities Ur. QMD model Ur. QMD vs. FOPI data: Au+Au @ 400 A Me. V 5. 5

Large Area Neutron Detector (LAND) Th. Blaich et al. , NIM A 314 136

Large Area Neutron Detector (LAND) Th. Blaich et al. , NIM A 314 136 -154 (1992) Adapted from P. Pawloski, IWM 2007 Neutrons efficiency>80% No 1, 2, 3 H (for En>400 Me. V) isotopic discriminations

Large Area Neutron Detector (LAND) neutron and Hydrogen detection Th. Blaich et al. ,

Large Area Neutron Detector (LAND) neutron and Hydrogen detection Th. Blaich et al. , NIM A 314 136 -154 (1992) Adapted from P. Pawloski, IWM 2007

FOPI/LAND experiment on neutron squeeze out (1991) Au+Au 400 A Me. V LAND coverage

FOPI/LAND experiment on neutron squeeze out (1991) Au+Au 400 A Me. V LAND coverage 37°< lab<53° 61°< lab<85° ~ 106 Events (b<7. 5 fm) Y. Leifels et al. , PRL 71, 963 (1993) P. Russotto et al. , PLB 697 (2011) Re-analysys of experimental data: see R. Lemmon talks

S( ) (Me. V) P. Russotto et al. , PLB 697 (2011) +/ -

S( ) (Me. V) P. Russotto et al. , PLB 697 (2011) +/ - ratio, Feng, et al. (Im. QMD) / 0 +/ - ratio Fermi Energy HIC, MSU B. A. Li, et al.

Au+Au @ 400 AMe. V ASY-EOS experiment carried out May 2011 (possible) 1 st

Au+Au @ 400 AMe. V ASY-EOS experiment carried out May 2011 (possible) 1 st phase toward FAIR ? ? ? (e. g. 132 Sn, 106 Sn beams) 96 Zr+96 Zr @ 400 AMe. V 96 Ru+96 Ru @ 400 AMe. V ~ 5 x 107 Events for each system Experimental setup Krakow array Beam Line Chimera Tof. Wall Micro. Ball target Shadow Bar Land (not splitted)

Land acceptance in the ASYEOS experiment: better coverage of mid-rapidity 33. 1< lab<58 deg

Land acceptance in the ASYEOS experiment: better coverage of mid-rapidity 33. 1< lab<58 deg Au+Au @ 400 AMe. V b=5. 5 -7. 5 fm Ur. QMD simulations

Au+Au @ 400 AMe. V Ur. QMD simulations 33. 1< lab<58 deg b=5. 5

Au+Au @ 400 AMe. V Ur. QMD simulations 33. 1< lab<58 deg b=5. 5 -7. 5 fm unfiltered inversion survives acceptance cuts of the experiment v 2 -pt-zoom-vxxx-exp. jpg

URQMD simulations Au+Au @ 400 AMe. V 0. 35<y/yp<0. 65 5. 5<b<7. 5 fm

URQMD simulations Au+Au @ 400 AMe. V 0. 35

Au+Au @ 400 AMe. V 0. 25<y/yp<0. 75 5. 5<b<7. 5 fm b<3 fm

Au+Au @ 400 AMe. V 0. 25

LAND With new TACQUILA (GSI-ASIC) electronic

LAND With new TACQUILA (GSI-ASIC) electronic

LAND Au+Au @ 400 AMe. V

LAND Au+Au @ 400 AMe. V

CHIMERA 300 μm Cs. I Si 12 cm 8 Rings 7 -20 deg 352

CHIMERA 300 μm Cs. I Si 12 cm 8 Rings 7 -20 deg 352 Cs. I 32 Si see S. Santoro talks

CHIMERA Fast (ch) Slow (ch) E Sil (ch) Fast (ch) see S. Santoro talk

CHIMERA Fast (ch) Slow (ch) E Sil (ch) Fast (ch) see S. Santoro talk

Aladin To. F-Wall 2 walls (front and rear) 96 plastics 2. 5 X 100

Aladin To. F-Wall 2 walls (front and rear) 96 plastics 2. 5 X 100 cm < 7°

To. F (ch) Aladin To. F-Wall Au+Au @ 400 AMe. V Energy (ch)

To. F (ch) Aladin To. F-Wall Au+Au @ 400 AMe. V Energy (ch)

black all charged particles blue-red used in reaction plane reconstrution (Q vector) ycm>0. 1

black all charged particles blue-red used in reaction plane reconstrution (Q vector) ycm>0. 1 Using only , , Z information Au+Au @ 400 AMe. V b=5. 5 -7. 5 fm simulations CHIMERA t (Cs. I) =10 ns pro-ycm-0. 1+-0 r 4 -7 -dw 5 -10 ns-10 de-au-20 run-covered. jpeg E/E (Cs. I) =10 % NOPB New Conditions 08/10/09

Micro. Ball 4 Rings 60 -147 deg 50 Cs. I ~ 1 cm thick

Micro. Ball 4 Rings 60 -147 deg 50 Cs. I ~ 1 cm thick Cs. I

Micro. Ball Au+Au @ 400 AMe. V 210 cm beam 140 cm >=7° =<20°

Micro. Ball Au+Au @ 400 AMe. V 210 cm beam 140 cm >=7° =<20° Not in scale CHIMERA: Micro. Ball ~ 10: 1 ~10 cm

Goliath David beam Michelangelo et al. , Florence (1501) Caravaggio et al. , Rome

Goliath David beam Michelangelo et al. , Florence (1501) Caravaggio et al. , Rome (1609)

Krakow Array 35 modules Coverage: 20. 7 - 63. 5 deg. Distance from the

Krakow Array 35 modules Coverage: 20. 7 - 63. 5 deg. Distance from the target: 402 mm. Digitized with 100 MHz, 14 bits Flash ADCs

Krakow Array http: //www. gsi. de/informationen/wti/library/scientificreport 201 0/index. html#PHN-NQM-FOPI

Krakow Array http: //www. gsi. de/informationen/wti/library/scientificreport 201 0/index. html#PHN-NQM-FOPI

Kali. Mera 2. 0 library V 2718 Titris Bus Local on-line analysis MBS Chimera

Kali. Mera 2. 0 library V 2718 Titris Bus Local on-line analysis MBS Chimera Receiver Time ordering, sorting, Data storing Global on-line analysis VME MBS: Multi Branch System Event builder MBS TRIVA TCP/IP VME TITRIS UDP/IP 9 U RIO 3 Event builder Chimera chimera 6 U TITRIS V 2718 Optical link Remote DAQ servers Trigger bus Scalers Land Tof. Wall Krakow Array Micro. Ball

Analysis is in progress inside Fair. Root framework cbmroot. gsi. de The Fair. Root

Analysis is in progress inside Fair. Root framework cbmroot. gsi. de The Fair. Root framework is fully based on the ROOT system. The user can create simulated data and/or perform analysis with the same framework. Moreover, Geant 3 and Geant 4 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.

Prescriptions: Theory Experiments • coalescence • Better experiments • reproduce full reaction features •

Prescriptions: Theory Experiments • coalescence • Better experiments • reproduce full reaction features • New detectors • momentum dependence, mass • Radioactive beams spltting, in medium cross section • …… • codes consistency, codes comparison • …… Collaborations!

ar. Xiv: 0704. 2340

ar. Xiv: 0704. 2340

From M. Di Toro talk at Asy-Eos 2010

From M. Di Toro talk at Asy-Eos 2010

Conclusions Several heavy Ion reactions observables have been useful in order to get information

Conclusions Several 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, 3 H/3 He ratio…). Viceversa, more extended data sets and consistency checks ( -/ +) are needed in order to arrive at firm conclusions at supra-saturation densities Neutron-proton elliptic flow is a promising observable In the ASY-EOS experiment at GSI we tried to measure such (and other) Model predictions consistency ? ? ? observables………. ? ? ? ……“a good constraint” of symmetry energy at supra-saturation density ? ? ?

THANKS to all ASYEOSers! • GSI, Germany • Ganil, France • Daresbury, UK •

THANKS to all ASYEOSers! • GSI, Germany • Ganil, France • Daresbury, UK • Liverpool, UK • Milano, Italy • Catania, Italy • Messina, Italy • MSU, USA • TAMU, USA • WMI, USA • Krakow, Poland • RIKEN, Japan • Zagreb, Croatia • Santiago, Spain • KSU, Saudi Arabia && others…

Adapted from P. Pawloski, IWM 2007

Adapted from P. Pawloski, IWM 2007

From M. Di Toro talk at Asy-Eos 2010

From M. Di Toro talk at Asy-Eos 2010

Main motivation: symmetry energy at supra-saturation densities Ur. QMD simulations STIFF Ur. QMD vs.

Main motivation: symmetry energy at supra-saturation densities Ur. QMD simulations STIFF Ur. QMD vs. FOPI data: Au+Au @ 400 AMe. V b< 2. 5 fm * SOFT * W. Reisdorf, et al. , Nucl. Phys. A 612 (1997) 493. See Qingfeng Li, J. Phys. G 31 1359 -1374 (2005) and references therein Coalescence condition: Dr <3 fm and Dp< 275 Me. V/c

Neutron and proton elliptic flow Ur. QMD vs. FOPI data: Au+Au @ 400 A

Neutron and proton elliptic flow Ur. QMD vs. FOPI data: Au+Au @ 400 A Me. V 5. 5

URQMD simulations: @ 400 AMe. V V 2 for |(y/yp)c. m. |<0. 1 96

URQMD simulations: @ 400 AMe. V V 2 for |(y/yp)c. m. |<0. 1 96 Zr+96 Zr STIFF 96 Ru+96 Ru Au+Au =(N-Z)/(N+Z) SOFT Au+Au b=5. 5 -7. 5 fm 96 Zr+96 Zr b=4 -6 fm 96 Ru+96 Ru b=4 -6 fm NTD 13/10/09

LAND coverage 37°< lab<53° 61°< lab<85°

LAND coverage 37°< lab<53° 61°< lab<85°

Time, charge and space resolution FWHM = 2. 35 s Aladin To. F-Wall A.

Time, charge and space resolution FWHM = 2. 35 s Aladin To. F-Wall A. Schüttauf