DPPD (Hamamatsu Digital Pixel PhotoDiode ) test page by TT (2004) shinshu U
a DPPD's photo
test circuit with 100nF coupling which gives slower signal (100 pixel : dppd #3 )
SINGLE pixel firings are seen!!!
(oscilloscope photos)
NOISE signal-ADC distrubutions by 100Hz clock of 1microsec width gate
signal-ADC distrubutions by 100Hz green LED light of 1microsec width gate at 49.5V bias without pedestal ORed
dependence of number of lights inlet : signal-ADC distrubutions by 100Hz green LED light of 1microsec width gate at 49.5V bias with pedestal ORed
test circuit with
470pF coupling
DPPD-#1 : 1mmx1mm surface mounted in a metal hausing 20x20=
400 pixels
photo
(#1) 50 micron pitch (20x20=400pixels)
and
a plot of frequency (kHz) at -10mV threshold with various bias Voltages
oscilloscope
photos of dppd1 noise at 50V
oscilloscope photos of dppd1 led signals at 50.5V
oscilloscope photos of dppd1 led signals (width of 200ns ) at 51V
oscilloscope photos of dppd1 led signals at 51.5V :
here you can find out discharging dppd-signals or no more signals!
led light test ( triggered by led pulser) for dppd1
adc distributions of led lights, although we do not know number of photons at dppd surface
DPPD-#3 : 1mmx1mm surface mounted in a metal hausing 10x10=
100 pixels
photos
(#3) 100 micron pitch (10x10=100pixels)
a bit bigger cels you can find there!
a plot of noise frequency (kHz) at -10mV threshold with various bias Voltages
oscilloscope photos of dppd#3 noises at 50V
led light test ( triggered by led pulser) for dppd3
oscilloscope photos of dppd#3 led signals (width of 100ns) at 50V
>
adc distributions although we do not know number photons at dppd surface
reference ( SiPM data made in Russia )
a plot of frequency (kHz) at -10mV threshold with various bias Voltages
