sPHENIX discussion of the superconducting solenoid

[Kin Yip <kinyip AT bnl.gov>]

Hi,

One thing I didn't mention is that as it's suggested in the meeting, we've asked Wuzheng to calculate the contours for the 125 A (in
addition to 100 A) and he's just done it.  I've placed the contours (in powerpoint) :

https://collab.external.bnl.gov/sites/sPHENIX-Magnet/Shared%20Documents/Dr.%20Meng%20Wuzheng%27s%20calculations/2015-5-6%20B-contour%20(100%20and%20125%20A).pptx

The only visible change (to me) is contour extend on the z-axis, changing from ~660 cm to ~750 cm or so.

Kin

On 05/06/2015 03:56 PM, Kin Yip wrote:

0) The two powerpoint files can be found from the agenda page :

https://indico.bnl.gov/conferenceDisplay.py?confId=1144


1) Roberto has graciously listed all the connections (that he knows) at the beginning of his powerpoint.  We have examined
all of them and kind of assigned responsibilities as follows.  Not all the parties attended the meeting, so please let me know
if you disagree etc.

     Connections                                               page no. in pptx      Group/person responsible
=====================================================================
All temperature/flow/pressure/valve control          2, 9                  R. Than's Cryo group (C-AD)
Strain Gauges                                                          3                     M. Anerella (SMD)
Potentiometer (formerly known as LVDT's)            4                     M. Anerella (SMD)
Vacuum                                                                   4                     M. Anerella (SMD)
Differential Voltage                                                4                     P. Joshi (SMD)
Power Supply                                                          4                     I. Marneris/B. Lambiase (C-AD)

2) Roberto went through some purchases made and future purchases and then about 50 pages of his slides for the upcoming PCSS
review (May 22, 2015).   Roberto has some slides (place holders) for the magnet mechanical design discussion for the PCSS
review but M. Anerella should really provide those or add/delete ...  D. Phillips has agreed to provide a page for the support structure
for the test.

3) We've somehow also discussed about the power supply system and the DAQ for the high-field test (and beyond).   For the power
supply (used for the high-field-test), one idea seems to be that if money/time allowed, Piyush's quench protection system monitors the
current and/or voltage of the power supply but the power supply is controlled elsewhere via a PSI (Power Supply Interface).  But in
principle Piyush's system can control and monitor and Piyush was not in the meeting.  We obviously need to discuss with him (in a
small group).  And people (such as D. Phillips) like to have a block diagram for the entire DAQ system --- which I hope Piyush
and/or Paul Giannotti may help to create such a thing.

4) Jon Hock showed us his new design for the yoke/pole-tip arrangements for the high-field test.   He has also made a first cost
estimate for making the steel yokes, which was over $400K, but this no. includes riggers' charge that shouldn't be included.  So,
it may be just $300K but this is just a first estimate :-)

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