Study of nuclear equations of state: the ASY-EOS experiment at GSI
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Study of nuclear equations of state: the ASY-EOS experiment at GSI
Simone Santoro1,2
for ASY-EOS Collaboration
1University of Messina 2 INFN - Catania
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Introduction
i. Experimental Set-up: CHIMERA
ii. Special Configuration at GSI
iii. Identification methods
iv. On-line results
v. Digitalization
vi. Reaction Plane reconstruction
vii. Conclusions
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Experimental Set-up
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CHIMERA Special Configuration at GSI
8 forward Rings
N° 352 CsI Detectors
N° 32 Si Detectors
7° < ϑ < 20°
The frame was very light
Low Nitrogen flow inside Chimera chamber
Carbon Fiber Pipe has been filled with circulating Helium
96Zr+96Zr @ 400 AMeV 96Ru+96Ru @ 400 AMeV
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Identification Methods
SiCsI(Tl)
ΔE(Si)-E(CsI)
Charge Z for particles punching through the Si detector
PSD in CsI(Tl)
Z and A for light charged particles
ΔE(Si)-ToF
Mass for particles stopping in the Si detector
ΔE(Si)-E(CsI)
Charge Z and A for light ions (Z<9) punching through the Si detector
HI
pd
t
3Hea
LiBe
~300 μm
3-12 cm
E(Si)-Rise time
Charge Z for particle stopping in Si detectors
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Fast (ch)
Fast (ch)
Slow (ch)
E Sil (ch)
Standard analogical acquisition
Identification Methods
197Au 105 pps 400 A.MeV + 197Au
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Fast (ch)
CHIMERA
Slow (ch)
Slow (ch)
Fast (ch)Fast (ch)
197Au 105 pps 400 A.MeV + 197Au
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Fast (ch)
Slow (ch)
Fast (ch)
E Sil (ch)
Identification Methods
Identification via KaliVeda Grid Library
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100 MHz of sampling
14 bit of resolution
Digital Pulse Shape acquisition DSPA
From P.Guazzoni et al., Chimera Milano group197Au 105 pps 400 A.MeV + 197Au
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Digital Pulse Shape acquisition DSPA
From P.Guazzoni et al., Chimera Milano group197Au 105 pps 400 A.MeV + 197Au
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M
hitQ1
)"("
For monitoring on-line
M
ZQ1
Reaction Plane reconstruction
1000
Phi (deg)
Yiel
d
-100 50-50 150-150
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Conclusions
CHIMERA worked well at GSI We got isotopic identification in CsI for Z≤2 The analysis is in progress…
and….. To realize the ASY-EOS experiment, a big international collaboration was needed:
In this sense the experiment was surely successful!!!!!
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Thanks for the attention
Acknowledgments
PaOlo RuSSotto, Tino MinnitiAntonio Trifirò
Enrico De FilippoGiuseppe Cardella
Giuseppe VerdeAngelo Pagano
and all CHIMERA group
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RISERVE
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Digital Pulse Shape acquisition DSPA
From P.Guazzoni et al., Chimera Milano group
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Electronic chain for CsI
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blackall charged particles
blue-redused in reaction plane reconstrution (Q
vector)ycm>0.1
CHIMERAt (Csi) =10 nsE/E (CsI) =10 %
NOPB New Conditions 08/10/09
M
ZQ1
Using only , , Z
information
pro-ycm-0.1+-0r4-7-dw5-10ns-10de-au-20run-covered.jpeg