sPHENIX discussion of the superconducting solenoid

[John Haggerty <haggerty AT bnl.gov>]

Sorry for the duplicate message, but the listserver wasn't initially 
configured to archive messages, and hopefully it is now.

Mike Anerella and Paul Kovach couldn't make the meeting in person, but 
reported by email:

> 1.  The shipping restraints are complete and we are preparing to ship 
them to Mike Racine at SLAC. I have requested the proper shipping 
address from Mike and am awaiting his reply. I have also asked him if he 
would be comfortable installing them or if we have to travel to SLAC to 
do the installation.
>
> 2.  I have done a preliminary layout of the valve box relocation and 
I would like everyone's concurrence on the configuration. I've attached 
a rough drawing of the layout. If everyone agrees I will be continuing 
to refine the design based on this configuration and will send drawings 
as the design evolves.
>
> 3.  I believe that Mat Donley has completed the SOW and a PO to 
Bluebird is in the works.
>
> Paul Kovach

Dave Phillips showed the attached drawing of the proposed location in 
building 912 of the solenoid for testing.  There was general consensus 
that the location was reasonable.  We will need to allocate some 
additional space around the magnet for power supplies, test equipment, 
and controls.

We discussed the logistics of getting the magnet set up in 912.  Moving 
the magnet may be deemed a critical lift, which will have consequences 
for reviewing it.  Also, depending on documentation available from SLAC, 
their lifting fixtures may need to be re-certified for use at BNL. Dave 
and Yousef will follow up on this.

There will have to be a safety review of the low field tests of the 
solenoid ("the 100A tests").  There is a calculation of the field that 
will determine the stay-clear distance, but there are also potential 
electrical, cryogenic, vacuum, and (non-flammable) gas hazards.

We discussed modifications to the stack to avoid the acceptance of the 
hadronic calorimeter.  The "up and out" design (attached) does not stay 
sufficiently out of the calorimeter envelope, but it's a good start 
looking at the issues.  It was unclear how difficult it would be to 
modify the (cold) connections in the small triangular "dog house" on the 
solenoid.  As we understand it now, the cold-warm transition is in the 
valve box.  The valve box is presently 4.5 m above the magnet axis, so 
it is quite high, and needs support both in sPHENIX and in 912.

I suggested that we plan to have an engineering evaluation of the 
transport and initial deployment in 912 with some of the people 
responsible for the solenoid at SLAC listening.  I will attempt to find 
a date, but the next regular time (July 23) is not good for many of us. 
 I'll write a separate email to try and schedule the next meeting.

--
John Haggerty
email: haggerty AT bnl.gov
cell: 631 741 3358

Attachment: BaBar Test Location 2014-07-08.pdf
Description: Adobe PDF document

Attachment: babar.pdf
Description: Adobe PDF document