sPHENIX discussion of the superconducting solenoid

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

Hi,

Thanks a lot for everything  !

> It should be fine to close the magnet tomorrow morning and 

> start the ramp. We'll probably show up around 9 if fine with 

> everybody, it has been a long day...

Great !  Hopefully, by that time, the Magnet will be near the full field.

Good night !

Kin

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

From: Nicola Pacifico <Nicola.Pacifico AT cern.ch>

Date: 11/7/22 12:06 AM (GMT-05:00)

To: "Yip, Kin" <kinyip AT bnl.gov>, "Haggerty, John" <haggerty AT bnl.gov>

Cc: Raphael Dumps <Raphael.Dumps AT cern.ch>, Francois Garnier <Francois.Garnier AT cern.ch>, Pritindra Bhowmick <pritindra.bhowmick AT cern.ch>

Subject: RE: Fixed ?

Hi,

We are just putting the bench into starting position right now. As Linus Torvalds said, "Now it's fixed. I mean, how many times can we get it wrong? At some point we just have to run out of bad ideas".

Jokes aside, Raphael and Francois intervened quite heavily on the mechanics. There were some issues with the clearances, which probably went unnoticed as the bench was assembled and tested in a 30+ Celsius environment and is now operating below 17. Just the CTE should be enough to cause the issues we have seen. 

Anyway, only way to know if this is right is to wait and see. 

I also had some electronics issues, now fixed.

It should be fine to close the magnet tomorrow morning and start the ramp. We'll probably show up around 9 if fine with everybody, it has been a long day...

Have a good night!

Cheers,

Nicola

----------------------------------------------------------------

Nicola Pacifico

bat. 70-R-008

CERN - European Organization for Nuclear Research

CH-1211, Geneva 23

e-mail: nicola.pacifico AT cern.ch

mobile: +41 75 411 8218

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From: Yip, Kin [kinyip AT bnl.gov]
Sent: 07 November 2022 05:57
To: John Haggerty
Cc: Nicola Pacifico
Subject: RE: Fixed ?

Hi,

They must be working very hard !

I am hoping to start ramping the Magnet  by 8 am Monday morning and if so, the magnet will reach full field around 9:45 am.   I hope Nicola will let us know whether this is good ?! 😊

Kin

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

From: John Haggerty <haggerty AT bnl.gov>

Date: 11/6/22 9:09 PM (GMT-05:00)

To: "Yip, Kin" <kinyip AT bnl.gov>

Subject: Re: Fixed ?

Kin,

I stopped in about 7 and they were still working on it, but they may be
done by now.

On 2022-11-06 21:05, Yip, Kin wrote:
> Hi, Nicola,
>
> I hope you guys have fixed the belt and any problems relayed to your
> bench ?  So that we can try to close the doors and ramp the magnet
> again tomorrow morning ?
>
> Kin

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