ECFA-DESY Prague NOV `02 Ivo Polak 1 APD-NOV02 APD + Preamplification
ECFA-DESY Prague NOV `02 Ivo Polak 2 Present results we tested behavior of APD Hamamatsu S channel matrix gain, uniformity preamplifier matching gain distribution
ECFA-DESY Prague NOV `02 Ivo Polak 3 Future plans crosstalk test on matrix APD S8550 preamp optimisation 16 channel system for minical study, test of filtering, shaping
ECFA-DESY Prague NOV `02 Ivo Polak 4 following Uniformity APD matrix Gain distribution APD + PreAmp DC gain graph Histograms of pulse response
ECFA-DESY Prague NOV `02 Ivo Polak 5 UNIFORMITY 4*8 pixels S8550 APD
ECFA-DESY Prague NOV `02 Ivo Polak 6 UNIFORMITY marked high dark current, E1 pixel
ECFA-DESY Prague NOV `02 Ivo Polak 7 APD matrix uniformity
ECFA-DESY Prague NOV `02 Ivo Polak 8 APD matrix uniformity
ECFA-DESY Prague NOV `02 Ivo Polak 9
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ECFA-DESY Prague NOV `02 Ivo Polak 11 DC gain APD pixel E1
ECFA-DESY Prague NOV `02 Ivo Polak 12 DC gain APD pixel E1
ECFA-DESY Prague NOV `02 Ivo Polak 13 DC gain formula How the Gain M is calculated? M = (Is – Id) / Is1 M gain of APD Is signal current (illuminated) Id dark current Is1 signal at low HV (M = 1)
ECFA-DESY Prague NOV `02 Ivo Polak 14 DC gain APD pixel D4
ECFA-DESY Prague NOV `02 Ivo Polak 15 DC gain APD pixel D4
ECFA-DESY Prague NOV `02 Ivo Polak 16 corrected HV bias 385.5V corrected HV bias 387.5V pixel E1 Beam test
ECFA-DESY Prague NOV `02 Ivo Polak 17 LED HV bias 1V diff
ECFA-DESY Prague NOV `02 Ivo Polak 18 LED APD out by 2
ECFA-DESY Prague NOV `02 Ivo Polak 19 LED
ECFA-DESY Prague NOV `02 Ivo Polak 20 LED long fetching
ECFA-DESY Prague NOV `02 Ivo Polak 21 Any questions? Thank you.