(Jordan V., Tony S., Gerardo M.)
Late entry
To get the gauge working at the filter cavity tube cross C7 we pulled the EtherCAT cable from cross C7 to cross D1, this allowed us to daisy chain the gauges at both crosses. To land the EtherCAT cable both ends were terminated, thanks Tony. To get power to the gauge we used one of the outlets in the filter cavity enclosure and a small din rail mountable power supply, the supply provides 24 VDC. Patrick took care of the software, see his aLOG here.
Currently we have the following items valved out along the filter cavity, two ion pumps;IPFCC6, IPFCC8, and the gauge PTCC7. We plan to incorporate them to the main vacuum volume on the next couple of weeks. Pressure at the gauge is low, thus we need to pump its volume down using an aux cart and a small turbo pump.
Last tuesday I was able to valve in the last two ion pumps into the filter cavity tube envelope, two of the 10" isolation valves at section C were closed to achieve this, then as the internal pressure of the filter cavity tube settle the isolation valves were opened.
Something to note with the performance of the HV cable for IPFCC8 (ion pump a the filter cavity cross 8) is a bit noisy, I noticed that the controller got noisy when I touched the HV cable, but will check both at a later time, maybe cable, grounding and/or controller issue.
(Anna I., Jordan V., Gerardo M.)
Last tuesday we valved in a gauge to the filter cavity tube vacuum volume.
We pumped the dead volume down until the pressure reached high 10^-07 torr, then introduced the gauge to the "short" volume of the filter cavity tube, we had closed two isolation valves, we waited about 10 minutes, then the isolation valves were opened. No issues to report.
