[PRad] [Revised Logentry] Follow-up Re: Possible damage on ADC boards by the short circuits from lead glass dynodes & boosters

xiongw at jlab.org xiongw at jlab.org
Mon May 23 16:20:02 EDT 2016

Logentry Text:
We checked the bad channels, and found G486 does not have dynode signal but has anode signal. So it must be the problem of connection or the divider.

We have borrowed 3 ADC1881M boards from Sergey to replace the two with dead channels. 1 out of 3 is found having bad channel 0 and very high pedestal for channel 0 - 15.
Now Crate 4 and Slot 8 board is replaced with a working one, and channels
G486, Crate 4, Slot 8, Channel 52
G572, Crate 4, Slot 8, Channel 38
are back. 

The only dead channel is G25, Crate 6, Slot 19, Channel 53, we will replace its board tomorrow.


This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3406015
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