Thesis presentation - APC

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Injection 4 different configurations : Auger VEM Absorption : 25 meters Auger VEM H Orsay VEM Absorption : 17 meters Orsay VEM H Muons spectrum ∝E -2,5 (E is energy) Electrons spectrum ∝E -2,5 Photons spectrum ∝E -1,8 Injection angle distribution : cos²θ From 20MeV up to 10GeV Experimental 30
Physical Processes • Čerenkov effect on primary : 81% of the detected photons • Delta electrons : 19% of the detected photons • Classical ionization • Particles decay • Bremhstrahlung radiation • Compton diffusion • Photoelectric Effect • Multiple diffusions • Pair creation • No scintillation For the energy lost mainly 31
Page 1 and 2: PIERRE AUGER OBSERVATORY SURFACE DE
Page 3 and 4: FRAMEWORK I - Presentation II - Exp
Page 5 and 6: Surface array Čerenkov detectors :
Page 11 and 12: • Allow a detailed study of the s
Page 13 and 14: Photomultiplier tubes (PMT) • PMT
Page 15 and 16: Bases and high voltage modules (HV)
Page 17 and 18: measured by Auger - UCLA collaborat
Page 19 and 20: Dynode to anode ratio measurements
Page 21 and 22: Detectors calibration unity VEM con
Page 23 and 24: Difference between the VEM and the
Page 25 and 26: Decay time (τ) Orsay test detector
Page 29: Parameters Wavelength dependent •
Page 33 and 34: Auger VEM H Charge to amplitude rat
Page 35 and 36: Comparison between 1 PMT and the av
Page 39 and 40: Baseline stability Orsay => 0,00045
Page 41 and 42: Control data Evolution in time of t
Page 43 and 44: event 762238 - 18 tanks Cuve 105 So
Page 45 and 46: constant Muon flux and altitude ∝
Page 47: LED signals Black box Tank For the

Thesis presentation - APC

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