sPHENIX discussion of the superconducting solenoid

["Yip, Kin" <kinyip AT bnl.gov>]

Agenda/powerpoint: https://indico.bnl.gov/conferenceDisplay.py?confId=2824

 

1.      T. Tallerico has made the purchase order (BNL: 0000328696) to make those Kapton/TEFZEL cable.  I was told that the vendor “KC Electronics” has received the order already. 

      But the real company which is making these special cables in spools are “Pelican”, as P. Joshi told us and showed us the spools.  “KC Electronics” is sort of the “middle-person”.

      Budget code used is 50236.  It may take 8-10 weeks to arrive.   Tom is trying to push them for fast(er) delivery ….

      T. Tallerico told me that the Cryo electrical group could still do a lot of the works for the high-field test without the above cables.

 

2.      M. Anerella in an email reminded us (and I asked him to clarify during the meeting) that the Cryo Extension will be made and wrapped up probably well before the above-mentioned cables arrive.   So, after Cryo Extension is wrapped up, there is only the G10 tube that we can insert the bundles of cables from one end to the other, and we can’t make additional voltage taps in the middle of the Cryo Extension if we want to.   But as far as I have heard (including from C. Schultheiss), we shouldn’t need voltage taps in the middle of the Cryo Extension.

3.      Paul Giannotti gave a presentation sort of correcting his last presentation (after the experts/wise-men have pointed out a couple critical problems).   We need final confirmation from C. Schultheiss and P. Johsi.  But it seems that we need only a total of 4 new/additional voltage taps on two ends of or outside the main Cryo Extension.  Paul’s powerpoint file (on p.7 and 8) shows the locations that he thinks where they should be.

4.      We should purchase the D connectors as soon as possible.   P.  Giannotti is responsible for this.

5.      R. Ceruti tended to think that the Cryo Extension work won’t be finished at the end of this month but should be by next month.

6.      As people have suggested, I’ve asked J. Hock to count how many man-hours that he’ll need to do all the drilling/tapping for the Flux Return Steel.

7.      J. Mills mentioned that the vendor in Indianapolis said that it’d be much cheaper if we use 1018 steel instead of 1006.   After the meeting, I checked that my calculation on Sept. 28, 2016 (https://collab.external.bnl.gov/sites/sPHENIX-Magnet/Past%20Presentations/2016-9-28%20B%20field%20difference%20(1006%20vs%201020).pptx) showed small difference when I used 1020 steel, instead of 1006 (Wuzheng’s BH curve/file).  The central field would change from 14001 G (1006 steel) to 13979 G (1020 steel).

8.      D. Lynch, J. Mills, E. O’Brien, P. Giannotti and myself went down with R. Ceruti and P. Kovach to see the progress of Cryo Extension work.   We talked about a couple specifics such that the T at the bottom of the doghouse/junction-box (under the ValveBox) should be horizontal.  ( R. Ceruti was initially not sure whether we have bought everything.  P. Kovach has convinced him so. )   

      Ray Ceruti mentioned to me that we need to support the new doghouse/junction-box underneath the ValveBox.   I talked to D. Phillips and J. Hock after the meeting.  They seem to think that the support from the ValveBox above and the Extension (which is supported by the Flux Return steel) should be enough to support that doghouse house.  The old doghouse had no additional support during the low-field test. I’m checking with P. Kovach.