sPHENIX discussion of the superconducting solenoid

[Kin Yip <kinyip AT bnl.gov>]

Hi,

I attach John's plot of the magnetic field from the raw data that he made last night.  Though there isn't a coordinate, x-coordinate is like the beam-axis from one side to another.

Their x/y/z's are in local coordinate system of the probe and the two sets of probes of facing oppositely (so one side -B

and the other +B).

Bx is like Bz (along the beam-axis).  Bz is like Bphi (small) and By is like Br where it changes signs at the center of the magnet.

Kin

-------- Forwarded Message --------

Subject:	Re: Close to finish ?
Date:	Thu, 3 Nov 2022 23:08:20 -0400
From:	John Haggerty <haggerty AT bnl.gov>
To:	Nicola Pacifico <Nicola.Pacifico AT cern.ch>
CC:	Kin Yip <kinyip AT bnl.gov>, Pritindra Bhowmick <pritindra.bhowmick AT cern.ch>, Raphael Dumps <Raphael.Dumps AT cern.ch>, Francois Garnier <Francois.Garnier AT cern.ch>

Nicola,

I copied over the files after I got home and the scan is completed, and as far as I can see, it's only the probe that reads 0 and the one that read 2 T are weird.

The bad probes seem to be this one:

"19": {
"a1": -219,
"a2": 159,
"a3": -651,
"b1": 0.0010065233686261973,
"b2": -0.000443075910030347,
"b3": 0.0006741165944615618,
"tAdc": 3712014,
"tConv": 16.575045543553273,
"probeID": "1F0000000BD9DC3A",
"probeName": "CRN160"
},

and this one:

"18": {
"a1": 395683,
"a2": -169335,
"a3": -8388608,
"b1": 2.7542683140682906,
"b2": -0.018583875185487243,
"b3": -0.06177130114542093,
"tAdc": 3730010,
"tConv": 16.68391450045914,
"probeID": "B20000000D56DC3A",
"probeName": "CRN155"
},

18 and 19... could be a pattern.

Also, I forgot that I have a dentist appointment at 8am on Friday, so I won't be in until about 9:30.

On 2022-11-03 21:14, Nicola Pacifico wrote:

Thanks John!

I see there's an outlier in every plot, could you identify it? I'm
setting up some analysis as well...

Cheers
Nicola

Sent from my phone

-------- Original message --------
From: John Haggerty <haggerty AT bnl.gov>
Date: Thu, Nov 3, 2022, 21:09
To: Nicola Pacifico <Nicola.Pacifico AT cern.ch>
Cc: Kin Yip <kinyip AT bnl.gov>, Pritindra Bhowmick
<pritindra.bhowmick AT cern.ch>, Raphael Dumps <Raphael.Dumps AT cern.ch>,
Francois Garnier <Francois.Garnier AT cern.ch>
Subject: Re: Close to finish ?

Nicola,

The raw data that I can see looks good to me... I see what must be the

radial component being quite large and changing sign in the middle, a
small phi component, and a central field of just about 1.4.

On 2022-11-03 20:49, Nicola Pacifico wrote:

Hi, I'm monitoring,

We just started the 600 mm step (it started from 4000, finishing at
100), so I would say 10ish is still a reasonable estimate... I'll

let

you know however as soon as it's done,

Cheers
Nicola

Sent from my phone

-------- Original message --------
From: "Yip, Kin" <kinyip AT bnl.gov>
Date: Thu, Nov 3, 2022, 20:47
To: Nicola Pacifico <Nicola.Pacifico AT cern.ch>, Pritindra Bhowmick
<pritindra.bhowmick AT cern.ch>, Raphael Dumps <Raphael.Dumps AT cern.ch>,
Francois Garnier <Francois.Garnier AT cern.ch>
Cc: John Haggerty <haggerty AT bnl.gov>
Subject: Close to finish ?

Hi Nicola and all,

Just checking ... do you think you will finish around 10 pm ?? Any
newest estimate ?

Kin

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

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

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

Attachment: allgood.pdf
Description: Adobe PDF document