1 S. E. Tzamarias S. E. Tzamarias Hellenic Open Hellenic Open University University N N eutrino eutrino E E xtended xtended S S ubmarine ubmarine T T elescope with elescope with O O ceanographic ceanographic R R esearch esearch Readout Electronics Readout Electronics DAQ & DAQ & Calibration Calibration
23
Embed
1 S. E. Tzamarias Hellenic Open University N eutrino E xtended S ubmarine T elescope with O ceanographic R esearch Readout Electronics DAQ & Calibration.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1
S. E. TzamariasS. E. TzamariasHellenic Open Hellenic Open
UniversityUniversity
NNeutrino eutrino EExtended xtended SSubmarine ubmarine TTelescope with elescope with OOceanographic ceanographic
Parameterized Angular Profile of the LED emission in air
Estimated Angular Profile of the LED emission in water
LED Angular Profile
Angle (Degrees)
11
to the floor board
Data Files
Delete Data Storage
Event samples
Monitor
Offline
fast analysis
DAQ Architecture
12
Online Software
Shore Board Downloads the FPGAs & PLD of the Floor Board Broadcasts the 40Mhz clock Receives Data from the Floor Board Transmits Data to the Run Control System
13
Event samples
Monitor
Real Time Monitor Environmental
• Thermometers
• Hygrometers
•Compass
•Inclinometer/Accelerometer
• Pressure meter
Electrical
• PMT High Voltage etc
Digitization & DAQ Performance
• Digitized waveforms
• PMT rates
• Trigger rates
• DAQ status
14
Real Time MonitorsReal Time Monitors
Sample
448 ns
During deployment
16
Waveform ReconstructionWaveform Reconstruction
Sample Offset (ADC counts)Sample
Off
set
(AD
C c
oun
ts)
Before the F.F.T. and the attenuation corrections
After the F.F.T. and the attenuation corrections
Rise Time
16 ns
9 ns Double pulse separation
Time (ns)
Vol
tage
(m
V)
17
Waveform Reconstruction
DST Production
Hit DefinitionData Quality Histograms
Sample
AD
C C
oun
ts
40 MHz Clock Waveform Capture
Event by Event Sampling Interval Variation (Constant Temperature)
Time (ns)
RMS=0.006 ns
Software to Hardware Trigger Time Difference (arbitrary time offset)