sPHENIX discussion of the superconducting solenoid

["Anerella, Michael D" <mda AT bnl.gov>]

All,

 

A cursory read of only the beginning of the paper reveals other differences in addition to the number of coil layers.  The conductor dimensions are different and the support system is changed.  A detailed list of variances could be made if there was some benefit, but I think it is better to simply refer to this document for design principles.

 

Mike

 

 

 

From: sphenix-magnet-l-bounces AT lists.bnl.gov [mailto:sphenix-magnet-l-bounces AT lists.bnl.gov] On Behalf Of Yip, Kin
Sent: Wednesday, April 01, 2015 6:58 AM
To: O'Brien, Edward; Haggerty, John; sphenix-magnet-l AT lists.bnl.gov; Mills, James A
Subject: Re: [Sphenix-magnet-l] BaBar Magnet note 233

 

Hello,

 

As I said right after John sent us this note (without figure), we probably can't use the numbers in the Note directly but we can learn from their methods.  Pasquale seems to think the same when I asked him: 

 

" The calculation of 1995 have some meaning because you can see the the approach followed in the mechanical design and

the limits assigned to the stress level. This is of some interest if you redo the mechanical analysis with larger axial magnetic forces."

 

He also adds:

 

"all documents up to 1995 reflects the conceptual design evolution  before the construction.

The engineering design was later done by ANSALDO in cooperation with INFN and SLAC

in 1996 . The main modification was to change from 1 layer to 2 layers coil. 

The papers published later than 1997 describe the coil as is."

 

Kin

 

Sent from my BNL Verizon Smartphone

 

 

------ Original message------

From: EdwardOBrien

Date: Tue, Mar 31, 2015 17:18

To: Haggerty, John;sphenix-magnet-l AT lists.bnl.gov;Yip, Kin;Mills, James A;

Subject:BaBar Magnet note 233

 

        Hi John, Kin, Jim,
         This is an excellent summary document of the technical
        specs of the BaBar magnet. I noticed that it was written
        in 1995, before the magnet was built. Do we know how
        much variation there is between the description in this
        tech note and what Ansaldo finally built for BaBar? Can
        this document be relied on as an accurate description of
        the magnet that we have? Thanks.

        Ed


       

On 3/27/2015 11:58 PM, John Haggerty wrote:
> Hello,
>
> Jim Mills found the paper copy of BaBar Note 233, the solenoid Technical
> Design Report that Pasquale referred to, and it seems to have many more
> pages of figures, but our colleagues at SLAC sent me this version of the
> document.
>
>
>
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