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チャカルタヤ山における 空気シャワー実験 PowerPoint PPT Presentation


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チャカルタヤ山における 空気シャワー実験. 本田 建  ( 山梨大学 ) Knee 領域の Energy Spectrum. Collaborator. K.Honda 1 ,N.Ohmori 3 ,K.Shinozaki 4 ,N.Inoue 4 ,M.Tamada 5 ,N.Kawasumi 2 ,N.Ochi, K.Hashimoto 2 ,I.Tsushima 2 ,A.Ohsawa 6 ,H.Aoki 7 ,K.Yokoi 8 ,T.Matano 9 , N.Martinic 10 ,R.Ticona 10 ,C.Aguirre 10

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チャカルタヤ山における 空気シャワー実験

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チャカルタヤ山における空気シャワー実験

本田 建 (山梨大学)

Knee 領域のEnergy Spectrum


Collaborator

K.Honda1,N.Ohmori3,K.Shinozaki4,N.Inoue4,M.Tamada5,N.Kawasumi2,N.Ochi,

K.Hashimoto2,I.Tsushima2,A.Ohsawa6,H.Aoki7,K.Yokoi8,T.Matano9,

N.Martinic10,R.Ticona10,C.Aguirre10

[1]Faculty of Engineering, Yamanashi University, Kofu, 400-8511, Japan[2]Faculty of Education, Yamanashi University, Kofu,400-8510, Japan[3]Faculty of Science, Kochi University, 780-8520, Japan[4]Faculty of Science, Saitama University, 388-8570, Japan[5]Faculty of Science and Technology, Kinki University, 577-8520, Japan[6]Institute for Cosmic Ray Research, University Tokyo, 277-8582, Japan[7]Faculty of Science, Souka University, 192-8577, Japan[8]College of science and Engineering, Aoyama Gakuin University, 157-8572, Japan[9]Shibakubo-cho 3-28-10,Tanashi,188-0014 Japan[10]Institute de Investigaciones Fisicas Universidad Mayor de San Andres, Bolivia


Air Shower Array at Mt. Chacaltaya (The hybrid experiment with AS and EC)

  • 5200 m a.s.l ( 540 g/cm2)

  • Scintillation detector

    for density

    0.25 m2 36●1.0 m2 9 ■□

    for Fast Timing

    0.25 m2 8○

    1.0 m2 5 □


dJ/dNest = dNest/dNobs dJ/dNobs

dJ/dE = dJ/dNest× dNest/dE

Energy Spectrum

Nest spectrum

Nobs spectrum

  • The resolution of size (Array design)

  • The effect of detector

    (thickness of scintillator)

  • Analysis method

    (analysis program)

  • Experimental Condition

  • Interaction Model

  • Chemical composition

  • Physics


Simulation

  • CORSIKA+QGSJETmodel

  • Primary composition

    (1) proton only~ above 2×104 GeV

    (2) iron only~ above 5×104 GeV

  • Include the detector response for each detector (plastic scintillator with 5cm thickness)

  • Simulated EAS data were re-analyzed to get the Shower Size(Ne) with our analysis method


SimulationdNest/dEdNest/dNobs

Nest

Nobs

E

Nest


data reduction

  • data analysis にSoft triggerを使用。

    trigger detectorに 1 particle以上 (trig=1)

    trigger detectorに 2 particle以上 (trig=2)

    ………

  • Simulation dataも同様にSoft triggerを使用してanalysisした。

    Soft trigger別のdNest/dNobsを求め、それぞれについてDetection Efficiencyを求めた。

  • 各TrigによるEnergy spectrumを求める。


Observation data Nobs spectrum trig=1

2.5x106

2.69

3.0

R<10m

Θ<30°


Observation data Nobs spectrum trig=2

2.71

4.4x106

2.97

R<10m

Θ<30°


Observation data Nobs spectrum trig=3

2.74

9.0x106

2.98

R<10m

Θ<30°


Simulation data Nest spectrum trig=2


Energy Spectrum

trig=3

trig=2


Energy Spectrum


END


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