Left Handed Daqload

Documentation for the DAQload.

Wire Bonds and Connections

Full wire bond diagrams for the hybrid (HCC and ABC chip) are included in HybridLH_Wirebond_Detail_V6.pdf

All of the connections on the LH board seem to work fine, the HV filter (region on the board where C1,C2,R4-R8 are located has all the correct components).

LH_DAQload.jpg

Mini-Sensor

Mini sensor is wire bonded to ABC chip and glued to the HV pad beneath it. Mini-sensor was not correctly cut and is larger than it is supposed to be (shown below)

LH_mini_sensor.jpg

Sensor should have a bond connecting it to the HVret pad (the outer metal pad). Instead the HV and HVret are shorted together, causing us to measure much larger than expected currents.

LBL_LH_fix.jpg

Not visible in this picture is a small opening on the mini-sensor outer bias ring, where there is an opening to allow the wire bonder to connect to the aluminum. There are four of these on the mini-sensor, one near each corner

picture would be beneficial

Mini sensor was not cut correctly, and as a result is shorting the HV and HVret ring together. To remedy this the HVret ring should be disconnected from ground. The mini-sensor bias ring should instead be wire bonded to the hybrid ground (the open gold pads next to the ABC130 chip). Remove the HVret connection on the other side of the hybrid and connect that pad to the hybrid ground. This should short the grounds together, and leave the HVret ring disconnected from ground (so that it can sit at -400V with the HV pad). This is shown in the following image

20161013_OversizeBiasing.jpg

-- Tom-Erik Haugen - 2016-10-11

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Topic attachments
I Attachment History Action Size Date Who Comment
JPEGjpg 20161013_OversizeBiasing.jpg r1 manage 94.5 K 2016-10-13 - 22:22 TomErikHaugen  
PDFpdf 20161013_OversizeBiasing.pdf r1 manage 328.6 K 2016-10-13 - 22:19 TomErikHaugen  
PDFpdf HybridLH_Wirebond_Detail_V6.pdf r1 manage 419.4 K 2016-10-11 - 23:59 TomErikHaugen  
JPEGjpg LBL_LH_fix.jpg r1 manage 5072.6 K 2016-10-12 - 16:48 TomErikHaugen  
JPEGjpg LH_DAQload.jpg r1 manage 49.2 K 2016-10-11 - 23:17 TomErikHaugen  
JPEGjpg LH_mini_sensor.jpg r1 manage 5688.1 K 2016-10-11 - 23:17 TomErikHaugen  
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Topic revision: r4 - 2016-10-13 - TomErikHaugen
 
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