GLAST Hiroshima University, ISAS Cosmic-Ray Source Generator Y.Fukazawa (Hiroshima U) M.Ozaki(ISAS) T.Mizuno(Hiroshima U) S.Hirano(Hiroshima U) T.Kamae(Hiroshima.

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Presentation transcript:

GLAST Hiroshima University, ISAS Cosmic-Ray Source Generator Y.Fukazawa (Hiroshima U) M.Ozaki(ISAS) T.Mizuno(Hiroshima U) S.Hirano(Hiroshima U) T.Kamae(Hiroshima U/SLAC)

GLAST Hiroshima University, ISAS Cosmic-Ray Source Generator is required for ・ Balloon Flight Calibration to predict a counting rate of π 0 decay Gamma-ray and Background ・ Science Analysis after launch to simulate and estimate the onboard background study of diffuse gamma-ray emission detection of faint gamma-ray sources especially for (Simulator)

GLAST Hiroshima University, ISAS Cosmic-Ray accelerated by young SNRs, Pulsars, or other sites modulated by Solar Wind cut-off by magnetic field of the Earth Generation of secondary components in the Air inject into satellites or balloons become the residual background by primary electrions or secondary particles and gamma-rays propagate in the interstellar space

GLAST Hiroshima University, ISAS Protons AMS Measurements ….. Primary and Secondary for various geomagnetic latitude

GLAST Hiroshima University, ISAS 40E exp(-(E/20) (E/3.96) -2.5 ) 3x10 -3 E -2.5 exp(-(E/0.16) -1 ) Primary Secondary

GLAST Hiroshima University, ISAS Electrons Information is not so enough as protons Primary Electrons Komori et al Verma et al Secondary

GLAST Hiroshima University, ISAS 0.723(E+1.1) x((E+mc 2 ) 2 -(mc 2 ) 2 )/((E+mc 2 +(1.1) 2 )/(1+(E/4.27) E /(1+(E/0.90) 1.35 ) … re-entrant 0.073E /(1+(E/0.90) 1.50 ) … splash Primary Secondary Solar modulation formula geomagnetic cutoff Komori 1999 Verma et al. modified (Gleeson and Axford 1968)

GLAST Hiroshima University, ISAS Incident Angle Distribution (1+0.6sin(theta)) sin(theta)d(theta) Pimary … theta<90°

GLAST Hiroshima University, ISAS Further developements ….. Support arbitral solar modulation and geomagnetic cutoff. Include Helium and other ions. Improve the incident angle distribution (theta, phi). Parallel Studies Residual background due to the cosmic-rays Improve the secondary components (intensity etc) Current Status Supporting the Balloon Flight experiments (various parameters are fixed for the balloon). Summary

GLAST Hiroshima University, ISAS

GLAST

GLAST