Thesis presentation - APC

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Gains adjustment • Counting rate method : for each PMT, gain adjustment at 100Hz (threshold : 150 FADC) ECART EN CHARGE (%) 40 20 0 PMT1-PMT2 PMT1-PMT3 -20 • 3 PMTs coincidence => 20 triggers per second -40 Identité des cuves • 15% accuracy between the 3 PMTs • Idem for the tanks • Histograms adjustment in charge for more accuracy DISPERSION -40 -20 0 20 4042 (%)
event 762238 – 18 tanks Cuve 105 Some events detected Cuve 106 event 959347 – 26 tanks VEM 30 20 10 VEM 30 20 10 VEM 30 20 10 Tank 106 1 0,5 ns 1 0,5 ns 1 0,5 ns Tank 105 ns ns ns E>10 20 eV 43
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 and 30: Parameters Wavelength dependent •
Page 31 and 32: Physical Processes • Čerenkov ef
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: Control data Evolution in time of t
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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