sPHENIX discussion of the superconducting solenoid

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

John, Kin, All,
We haven't ever analyzed the allowable load, since there shouldn't ever be 
any.  I don't see why personnel and large tools don't make their way to the 
lead end platform by going up and over the lead end steel instead of by 
walking across the superconducting magnet.  Even if there is no structural 
damage, there could be some deleterious effect on the old bolted O-ring 
vacuum seals.  Unlikely, but why take unnecessary risks?
p.s.   No surprise regarding John's reply below, given his infamous photo 
standing inside the magnet, celebrating its transfer to BNL...
cheers,
Mike



-----Original Message-----
From: sPHENIX-magnet-l [mailto:sphenix-magnet-l-bounces AT lists.bnl.gov] On 
Behalf Of John Haggerty
Sent: Monday, July 10, 2017 3:19 PM
To: sphenix-magnet-l AT lists.bnl.gov
Subject: Re: [Sphenix-magnet-l] Is it OK to stand inside the solenoid ?

Kin,

I don't know for sure; I think the drawings say the inner wall is 10 mm
5083 aluminum, but at SLAC they lifted the solenoid with a spider that fit 
inside the cryostat like this:

> http://www-project.slac.stanford.edu/slacpix/BaBar/16_mag/to_290.jpg

so I always assumed that it wasn't a problem if a couple of people threw 
their weight around.

sPHENIX itself does not intend to put any load on the cryostat inner wall as 
far as I know.

On 7/10/17 1:28 PM, Yip, Kin wrote:
> Dear Mike, Paul, Jon & Dave,
> 
> As Paul Orfin asked below, I sometimes wonder about this too when I 
> saw people walk through the solenoid.
> 
> Can we safely walk and stand inside the inner solenoid ?  
> Approximately how much weight can the inner solenoid handle ?
> 
> /Sent from my Verizon LG Smartphone/
> 
> ------ Original message------
> *From: *Orfin, Paul
> *Date: *Mon, Jul 10, 2017 12:37
> *To: *Yip, Kin;
> *Cc: *
> *Subject:*RE: Sonny and Joe have taken the half-rack ... waiting for 
> the survey result ... carpenter putting up the railing
> 
> Kin,
> 
> Has anyone determined the maximum load allowed  on the inner diameter 
> of the solenoid?  I don't know the details of the inner plate 
> thickness but there may be a weight limit for materials being brought 
> in by foot.  I just want to make sure there is no damage to the 
> solenoid.  I understand that the magnet was built to handle large 
> magnetic forces but concentrated loads from someone's foot for 
> instance, may not have been taken into design consideration.  Looking 
> at the pictures of people in the magnet made me think of this just now.
> 
> Thank you,
> 
> Paul Orfin
> Cryogenic Systems, Collider-Accelerator Department Brookhaven National 
> Laboratory
> Telephone: (631) 344-2899
> 
> *From:*sPHENIX-magnet-l 
> [mailto:sphenix-magnet-l-bounces AT lists.bnl.gov]
> *On Behalf Of *Yip, Kin
> *Sent:* Monday, July 10, 2017 11:50 AM
> *To:* sphenix-magnet-l AT lists.bnl.gov
> *Subject:* [Sphenix-magnet-l] Sonny and Joe have taken the half-rack ... 
> waiting for the survey result ... carpenter putting up the railing
> 
> Hi,
> 
> 45 minutes ago or so, I showed Sonny Simaiuta and Joe Dambra where the 
> half-rack was in Bldg. 912.  They have taken it to Superconducting 
> Magnet
> 
> Division to make small modification.
> 
> I've just taken another picture this morning around the Magnet/steel box :
> 
> https://collab.external.bnl.gov/sites/sPHENIX-Magnet/Pictures/High%20F
> ield%20Test/Return%20Yoke%20Construction/2017-7-10.jpg
> 
> Apparently, the survey was taken late last Friday after the magnet was 
> slightly rotated.  Now, we're waiting for the survey group to analyze
> 
> the data.  Matt (who has been doing the analysis)  is out today and 
> Frank Karl is trying to see whether he can do the analysis   or   they 
> have to wait
> 
> for Matt to come back tomorrow.
> 
> Richard Meier was moving his cables.   I also saw that a carpenter was 
> installing the railing for the platform (all in Aluminium) in the Lead-End.
> 
> So, the schedule  that D. Phillips sent last Friday (below) seems to 
> be materializing (though Dave is not here today).  Hopefully, the 
> riggers and Ray Ceruti's group can install the Extension this Wed.
> 
> Kin
> 
> *From:* Phillips, David B
> *Sent:* Friday, July 07, 2017 11:45 AM
> *To:* Ceruti, Raymond B <rayc AT bnl.gov <mailto:rayc AT bnl.gov>>; Yip, Kin 
> <kinyip AT bnl.gov <mailto:kinyip AT bnl.gov>>; Mills, James A 
> <mills AT bnl.gov <mailto:mills AT bnl.gov>>; Hock, Jonathan <jhock AT bnl.gov 
> <mailto:jhock AT bnl.gov>>; Streckenbach, Brian <bstreckenbach AT bnl.gov 
> <mailto:bstreckenbach AT bnl.gov>>
> *Cc:* Kobasiuk, Frederick D <kobasiuk AT bnl.gov 
> <mailto:kobasiuk AT bnl.gov>>; Folz, Charles <cfolz AT bnl.gov 
> <mailto:cfolz AT bnl.gov>>; Anerella, Michael D <mda AT bnl.gov 
> <mailto:mda AT bnl.gov>>; Karl, Francis X <karl AT bnl.gov 
> <mailto:karl AT bnl.gov>>; Ilardo, Matthew <milardo AT bnl.gov 
> <mailto:milardo AT bnl.gov>>
> *Subject:* sPHENIX Magnet plan for next week
> 
> sPHENIX Magnet plan for next week:
> 
> Friday 7/7 - Riggers place cryostat in correct position
> 
> Friday 7/7-Monday 7/10 - Survey confirms cryostat is correctly 
> positioned
> 
> Monday 7/10-Tuesday 7/11 - Carpenters install handrails and access 
> ladder to internal Lead End platform.
> 
> Wednesday 7/12 - Riggers and Magnet Division install Valve Box 
> Extension
> 
> Monday 7/10 - until completed - Drilling/taping holes in return steel
> 
> Thursday 7/13 - until completed  - Riggers install return steel (this 
> needs to be coordinated with MD Teck's working on Dog House 
> connections)
> 
> Week of 7/17:
> 
> -MD Teck's continue with Dog House connections
> 
> -Riggers install Return Steel and shield blocks for Valve Box Platform
> 
> -Carpenters assemble scaffolding for access to External Dog House
> 
> -Carpenters install handrails etc for Valve Box Platform
> 
> David Phillips
> 
> Building 911B
> 
> Upton, NY 11973
> 
> 631-344-4671, Fax 631-344-5954, Cell 631-804-9477
> 
> On site pager 344-3456 then 4267 then your number
> 
> 
> 
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> 


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