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A second ongoing issue that was not solved with the firmware update, is the inability to run all four QPC channels at once without error. Three channels can run properly, but once the fourth channel is active, all four channels will enter an error state. This topic Even so, another problem was discovered where even three, or two channels cannot be run stably, so we must replace the controller. These topics was discussed with Edwards as well, but the fix is replacing the CPU chipfor the former, and uncertain for the latter. All QPCs with this the 4-channel error must be sent back to Edwards so that they can replace this chip, then resent back, but this is not possible with supply-chain issues and critical dates for beam. We are pushing to get new QPCs that were order ordered last year to arrive sometime in October or November so that we can replace these controllers and send the defective ones out to be fixed.Mike Estrada anything to add/fix to this QPC section?

In addition, there have been multiple problematic ion pumps on the HXR line that have been delivering lackluster vacuum levels for months; The worst of which even had to be replaced at one point. After a long RMA process due to the aforementioned supply chain issues, the controller for all of these pumps was swapped for a freshly RMA'd one. While the pumps are able to stay on consistently now, they are still delivering lackluster vacuum levels. They have been Hi-Pot tested and the worst performing pump was determined to fail the hi-pot test. This debugging process is ongoing.

MEC-U

Jing Yin 

LCLS-II-HE

Margaret Ghaly 

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