Sphenix-tpc-l mailing list

[Ross Corliss <ross.corliss AT stonybrook.edu>]

Dear All, 

The action items from last week's TPC Engineering meeting are below, and the status document is posted on indico as usual:
https://indico.bnl.gov/event/11836/
As always, if you shared slides etc and haven't posted them yet, please do so before the next meeting for posterity's sake.

As a reminder, we will NOT be holding the usual meeting tomorrow, because of the review that takes place at the same time.  Our next meeting TPC Engineering meeting will be next week, at the usual coordinates: Wednesday, Sept 29, at 9:30AM Eastern:
https://indico.bnl.gov/event/11838/
https://bnl.zoomgov.com/j/1606777143?pwd=Nkd6ZWtGejlaR29xNnY1TFA3N3haUT09


-Ross

Anyone, if you have a procurement, call it out!  Tell Ross, Tom, and >>Ed<<
Bob will do vacuum (voltage?) test of QE of aluminum to confirm what laser power we need. 
Bob will send Chuck the contact info for Shanghai and Knight so Chuck can start a QC survey.
Bob will talk with BS to find out the safe deadtime (propose 10us?)
Connor has Dan's significantly stiffer original design, and will run through that modal analysis and show(?) that it doesn't change the natural frequencies enough to be attractive.
Connor will check in on the status of the rack panel layout with Joe. 
Connor will consider how to safely remove the installation pipe.  The concept of multiple support points looks promising, and more details are required.  This will be the focus after the TPC support is finalized.
Connor will fine tune the diffuse laber fibers routing. 
Connor will give clearance to the TPOT footprint as much as possible in the TPC design
Connor will integrate FEE Cooling lines (1" diam) into the cable routing diagrams (away from TPC toward the recirculator)
Connor will investigate the details of the picture frame connections (torque etc) for the FEA of the TPC support.
Connor will look for places where survey marks could be placed (to meet with survey folks before the end of July).
Connor will reach out to John H. about the expected accuracy of the iHCal and the magnetic field alignment.
Connor will route RG59 cables, one to each HV card (one per module) plus additionally four more (inner field cage north, outer field cage north, inner field cage south outer field cage south) aka the three small wire feedthroughs.   And will communicate with Tom and Joel to determine the full length of the HV cable.
John C. will show his FEA results 09/15. (next wednesday)
John K. will run the test to see if the 150/16 crystal is sufficiently stable, when he is back on 09/18 or so.
Luke will update us and supply some pictures of the x-ray box.
Nikhil and Ross will fine tune the petal lampshade and confirm that the brackets are stable, and that they clear the walls of the evaporator.
Rich will look at the choreography and ask John C or Chris for help on FEA/design if any of the elements for installation seem risky.  He will put a model together and contact Jim to distribute tasks as needed. 
Rob Pisani will produce a slide on the gas failsafe passive and active alarms, what happens if the gasroom goes dark, etc for this meeting, and eventual propagation to Joel.
Rob will check on when the PLC is expected to arrive etc.
Rob will keep us posted on gas rack news.
Ross et al. will make a final plate if the prototype spacing is stable.
Ross, Tom, and all. will evaporate again when possible.
Takao or John H. will give updates on the Slice Test.
Takao will move forward with populating cards in the absence of the frequency clock crystal (or as least confirm how much we can do without it).
Takao will reach out to John K., ask him to provide a checklist of what has been or needs to be checked on the readout boards from the slice test in order to proceed with production. -- this is needed for a final design review anyway. (or procurement readiness review?)
Tom et al. will test voltages for the HV cards once the x-ray box is ready.  Resistors will be purchased after this test (they are a negligible cost overall)
When needed, someone should make the drawings from the models, get approval, and order.…Connor says ~2 weeks required after we start the process.  May want to tie additional things onto the panels, so want to complete routing before purchase.

==========
Dr. Ross Corliss

If it's work hours, and I'm not in a meeting, feel free to look for me in my virtual office:
https://stonybrook.zoom.us/my/rossoffice?pwd=ZmZ2SlRIMVFvUUJwbUkyOVNVTmE5QT09

-- 
You received this message because you are subscribed to the Google Groups "sPHENIX_TPC_General" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sphenix_tpc_general+unsubscribe AT stonybrook.edu.
To view this discussion on the web visit https://groups.google.com/a/stonybrook.edu/d/msgid/sphenix_tpc_general/97BB9189-7124-4C89-9806-BAA6E8B2D20C%40stonybrook.edu.