A.Tsirigotus

1
A.Tsirigotus Hellenic Open University
Neutrino Extended Submarine Telescope with
Oceanographic Research The NESTOR O.M.
2
The Detector
3
The NESTOR Optical Module
PMT base
dc/dc converter
Silica
Pressure
gauges
Al disk
Hamamatsu PMT inside the
BENTHOS sphere
4
Extensive Lab tests On single p.e. conditions
Detector Preparation Optical Modules
5
Detector Preparation Attenuation Correction
Reference waveform
Electronic delay lines and amplifier
Coaxial cable
6
Data from a depth of 4000 m Single PMT Rates
Trigger 4fold Coincidence
7
Waveform Reconstruction
Offset (ADC counts)
Sample Offset (ADC counts)
Sample
8
Data from a depth of 4000 m PMT Pulse Height
Distribution
Calibration
single p.e. LED Run
single p.e. pulse height distribution two p.e.s
pulse height distribution dark current pulse
height distribution sum of the above
9
Data from a depth of 4000 m Calibration Run
Calibration Data Analysis
Calibration Database Quality Histograms
LED Calibration Data Gain Monitors
10
Data from a depth of 4000 m Calibration Run