Development of FLINT experiment Konstantin Mikhailov for FLINT collaboration ITEP 24 November 2011...
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Development of FLINT experiment
Konstantin Mikhailov for FLINT collaboration
ITEP
24 November 2011
The Session-conference of Nuclear Physics Division ofRussian Academy of Sciences "Physics of Fundamental Interactions" (ITEP, Nov, 2011)
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The idea of FLINT experimentPhase diagram, process schema
FLINT setup
Current status of experiment
New results
Development of FLINT setup
Conclusion
Outline
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 2
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The idea of FLINT (FLucton INTeraction)
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 3
Phase diagram* Scheme of process
А2
Fluctons
Dense baryon system
А1
*http://www.gsi.de/forschung/fair_experiments/CBM/
NICA MPD
ITEP FLINT
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FLINT Setup
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 4
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FLINT Setup
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 5
Runs 2007 2010 2011
EC channels ~50 124 124
Reaction C+Be C+Be C+Be
EKin, AGeV 3.2 2, 3.2, 4 3.2
Intensity, ions/spill ~107 ~2*108 ~2*108
Exposition 1 day 20 days 10 days
Trigger 1 GeV Different Diffferent
Data 750 k 10 M 5 M
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Data quality cuts
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 6
Three groups of cuts: Spill Hit Multiplicity Signal shape
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Data quality cuts
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 7
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Photon spectra CBe→γX 3.2 AGeV
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 8
FLINT Preliminary
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Photon spectra 2.0 AGeV
K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 9
FLINT Preliminary
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 10
Slope vs angle 12C+9Be→γ+X
FLINT Preliminary
Θ [degrees]
E 0 [G
eV]
1/p dN/dE fitted by Const*exp(-E/E0)
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 11
Spectrum vs cumulative number
1/p dN/dE fitted by const*exp(-X/X0)
T/A=2.0 GeVT/A=3.2 GeV
Θ=35-53O Θ=35-53O
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 12
Kinematical Boundaries
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 13
Data and UrQMD
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 14
Development of FLINT setup
V
T
N2
ToF
EC1
M1
N1
EC2
M2
Chambers
EC-electromagnetic calorimetersN-neutron detectorsM-magnets V-vertex detector
6m
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 15
Background with UrQMD
• UrQMD: C+Be at T/A = 2.0, 3.2 and 4.0 GeV• Select events with 6 (or more) nucleon-participants • Require momentum sum of any 6N is less than 100 MeV/c• Change these 6 nucleon system to π0+6N system• Pπ0= P6N according to reaction 3N+3N→π0+6N at the same T/A
• momentum of each nucleon in π0+6N system is smeared with a parameter σsmear: σx=σy=σz=σsmear=340 MeV/c • Background is selected UrQMD event w/o 6 nucleon system• Signal is new 6N
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 16
Signal to background
T/A=2.0
T/A=3.2
T/A=4.0
Background Signal Signal+Backgrund
T/A GeV S/B2.0 ~ 33.2 ~ 54.0 ~ 7
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Conclusions
The acceptance of FLINT setup increased two times due to new super module New FLINT experimental results was presented Photon spectra in CBe→γX reaction at 2.0, 3.2 AGeV were measured with FLINT setup Spectra were fitted by exponential function The slope of the spectrum depends on the energy The slope of spectrum depends on theta angle for both energies Data confirm flucton-flucton interaction Development of FLINT setup and first estimation of S/B was presented
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Extra slides
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Example of signal
maximum
Tail
Front
Pedestal
Post Pedestal
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C+Be->gamma+X
T/A=3.2 GeV
Kinematical Boundaries
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 21
Kinematical Boundaries 3.2AGeV
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NeutronDetector
PC2
PC1
TOF2
TOF1
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DCM detector(project)
ECal
Magnet Neutrons detectorChambers
ToF
VETO
Vertex detector
TargetBeam
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K.Mikhailov The session-conference RAS, ITEP, 24 November 2011 24
New ITEP experimental hall
FLIN
T
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FLINT supermodule
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