Changes between Version 5 and Version 6 of LV_RevB


Ignore:
Timestamp:
Apr 14, 2020, 4:57:26 PM (3 years ago)
Author:
Michael
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • LV_RevB

    v5 v6  
    1313[[BR]][[Image(http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Fil_nogap.jpg, 15%, link=[http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Fil_nogap.jpg])]]
    1414[[Image(http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Fil_gap.jpg, 15%, link=[http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Fil_gap.jpg])]]
    15 [[BR]]In these two images you can see the linear behavior of the Filament Current supply. In the first image there is essentially no voltage gap between the top and bottom of the load, in this state no current is being pushed through the load. In the second image there is a 10V drop across the load. For this test the load was a 10W 10ohm cement resistor. As expected the voltage drop across the load scaled linearly between these two images as the potentiometer was adjusted. The full behavior of the Filament supply is described in more detail in [http://ohm.bu.edu/trac/edf/wiki/FilamentSupply_RevA_Testing_2_6_20 this] page
    16 [[BR]]These two images show the fall and rise behavior of the Filament Current Supply. The Filament Current Supply also has a rise and fall time of ~100ns, this means it doesn't add any delay to the output of the HV Pulser. In these two images it is also visible that there is no relevant delay between the top of the load (the output of the HV Pulser) and the Filament Supply response in the bottom of the load.
    17 [[BR]]'''Results:''' These results are good. RevB of the HV Pulser and Filament Supply are both working properly.
     15[[BR]]In these two images you can see the linear behavior of the Filament Current supply. In the first image there is essentially no voltage gap between the top and bottom of the load, in this state no current is being pushed through the load. In the second image there is a 7V drop across the load. For this test the load was a 10W 10ohm cement resistor. As expected the voltage drop across the load scaled linearly between these two images as the potentiometer was adjusted. The full behavior of the Filament supply is described in more detail in [http://ohm.bu.edu/trac/edf/wiki/FilamentSupply_RevA_Testing_2_6_20 this] page
     16[[BR]]'''Results:''' These results are good. RevB of the LV Mixer and Filament Supply are both working properly.
    1817[[BR]]'''Special Note on Noise:'''
    1918[[BR]][[Image(http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Noise.jpg, 15%, link=[http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Noise.jpg])]]
    2019[[Image(http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/TestBench.jpg, 15%, link=[http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/TestBench.jpg])]]
    2120[[Image(http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Voltage_div.jpg, 15%, link=[http://gauss.bu.edu/svn/tof-system/Gallery/2020-04-14/Votlage_div.jpg])]]
    22 From the above images there is visible noise.
     21[[BR]]Because of the circumstances having to do with the lock-down, The testing setup for these experiments was not ideal. The Tof Adapter is being powered by two wall voltage adapters stripped to their leads. The Offset Voltage is supplied with a KPS305D DC Power Supply. The Peak-Peak Voltage of the LV Mixer is being supplied with a voltage divider being split from the reads of a USB Mini phone charger. Additionally all of these are being plugged into a power strips as an ON/OFF switch. This setup is impressive and functional for a home testing setup, but it is not comparable to the test bench equipment at the EDF. This setup undoubtedly adds a lot of noise to the situation that I do not expect to be present in a more professional environment. It's a testament to the performance of the Boards that they all function properly despite the odds being against them.