Page History

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 We are ready to put the FEB cooling plate into the detector and hook up the detectors to continue testing. 

1/20/2015

FEB plate was installed and hooked up today.

We see one problem with FEB power - L5b DVDD sense is not connected (sense voltage 0, terminal voltage maxed out), and this comes and goes as the pigtail is manipulated. Opening up the backshell on the flange pigtail, the DVDD+ sense pin (pin 20) is clearly not terminated correctly - you can see the stripped end of the wire pulling out of the connector, it looks like a poorly crimped pin or something. FEB power looks fine otherwise. Good news.

We don't get any data link on two FEBs - L4t and L4b. The DVDD current on these FEBs doesn't rise when the flange is turned on. Since these are the two hardest FEBs to plug in, we suspect the high-speed cables are not plugged in right on those FEBs. Unless we find some other cause for this problem, it means opening up the box again. But if we're right, it's an easy fix. We do get link on all the others, so Ben's firmware fix is working.

We can't turn the hybrids on - Ryan's Python script gives a socket error. This is probably a software issue. Nothing to worry about, but it means we didn't get to check sync or take data tonight.

We left the cooling running, and the MPOD off.

Equipment

Interlock board

see Group C interlock board for instructions on monitoring and controls.

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