Energetic Gamma Ray Experiment 中国斜学我术大学 Telescope(EGRET) University of Science and Technology of China Gamma .Ray Plastic Upper Spark pair telescope Scintillator Chamber Assembly 0.75-30MeV e Tracker:spark chamber Lower .Spark Chamber Calorimeter:Nal crystal Assembly Crystal Scintillator Photomultipliers- Particles absorbed:" light emitted
Energetic Gamma Ray Experiment Telescope(EGRET) pair telescope 0.75 - 30 MeV Tracker: spark chamber Calorimeter: NaI crystal
Egret results 中园斜我术大学 University of Science and Technology of China EGRET All-Sky Gamma Ray Survey Above 100 MeV First all sky map above 100 MeV,nearly 200 sources detected
Egret results First all sky map above 100 MeV, nearly 200 sources detected
Fermi LAT(2008-） 中国斜学我术大学 University of Science and Technology of China Tracker Tracker:tungsten+ silicon strip Calorimeter:Csl 30 MeV-1000 GeV psf of about 1degree @1GeV Grid ACD Thermal 0.1degree @>10Gev Blanket DAO Calorimeter Electronics
Fermi LAT (2008 - ) Tracker: tungsten+ silicon strip Calorimeter: CsI 30 MeV - 1000 GeV psf of about 1degree @1GeV 0.1degree @>10GeV
Fermi LAT (2008-) 中国斜草我术大学 University of Science and Technology of China More than 5000 sources and extraordinary diffuse structures(Fermi bubble)are detected
Fermi LAT (2008 - ) More than 5000 sources and extraordinary diffuse structures (Fermi bubble) are detected
Ground based detectors 中国斜学我术大学 University of Science and Technology of China Atmosphere is opaque for gamma-rays Can detect the secondary particles produced in the interaction of gamma-rays with air
Ground based detectors Atmosphere is opaque for gamma-rays Can detect the secondary particles produced in the interaction of gamma-rays with air