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Re: [Sphenix-magnet-l] Brief Summary of sPHENIX Magnet biweekly meeting on July 20, 2016 at 1:30 pm at the conference room

From: "Hock, Jonathan" <jhock AT bnl.gov>
To: "Phillips, David B" <phillips AT bnl.gov>, "Kovach, Paul E" <kovach AT bnl.gov>, "Yip, Kin" <kinyip AT bnl.gov>, "sphenix-magnet-l AT lists.bnl.gov" <sphenix-magnet-l AT lists.bnl.gov>
Subject: Re: [Sphenix-magnet-l] Brief Summary of sPHENIX Magnet biweekly meeting on July 20, 2016 at 1:30 pm at the conference room
Date: Fri, 22 Jul 2016 10:33:57 +0000

All,

There is only 4" of clearance between the back of the dog house and the steel end plate for the high field test. This feed thru should be relocated.

-----Original Message-----
From: sphenix-magnet-l-bounces AT lists.bnl.gov [mailto:sphenix-magnet-l-bounces AT lists.bnl.gov] On Behalf Of Phillips, David B
Sent: Thursday, July 21, 2016 4:42 PM
To: Kovach, Paul E <kovach AT bnl.gov>; Yip, Kin <kinyip AT bnl.gov>; sphenix-magnet-l AT lists.bnl.gov
Subject: Re: [Sphenix-magnet-l] Brief Summary of sPHENIX Magnet biweekly meeting on July 20, 2016 at 1:30 pm at the conference room

On the High Field Test setup that location points back to the steel and even if it does fit it will be very difficult to access.

Dave

-----Original Message-----

From: sphenix-magnet-l-bounces AT lists.bnl.gov [mailto:sphenix-magnet-l-bounces AT lists.bnl.gov] On Behalf Of Kovach, Paul E

Sent: Thursday, July 21, 2016 4:09 PM

To: Yip, Kin; sphenix-magnet-l AT lists.bnl.gov

Subject: Re: [Sphenix-magnet-l] Brief Summary of sPHENIX Magnet biweekly meeting on July 20, 2016 at 1:30 pm at the conference room

This is where I suggest that we add an NW40 quick flange to the new doghouse. I don't know what your plans are for supporting the valve box, but I assume you will be supporting it from the bottom of the dog house so I added the feedthrough on the back. If someone picks the NW40 flange and mating connector that you want to use I'll add them to the drawings. The tube on the flange is 1-1/2 dia.

-----Original Message-----

From: sphenix-magnet-l-bounces AT lists.bnl.gov [mailto:sphenix-magnet-l-bounces AT lists.bnl.gov] On Behalf Of Kin Yip

Sent: Wednesday, July 20, 2016 4:05 PM

To: sphenix-magnet-l AT lists.bnl.gov

Subject: [Sphenix-magnet-l] Brief Summary of sPHENIX Magnet biweekly meeting on July 20, 2016 at 1:30 pm at the conference room

First of all, a very personal/subjective feeling here:

This meeting is a candidate for the most productive meeting of all sPHENIX Magnet biweekly meetings (so far).

=======================================================================================

Powerpoint/Agenda page:

https://indico.bnl.gov/conferenceDisplay.py?confId=2269

=======================================================================================

1. Today's meeting is mainly about the placement of voltage taps and temperature sensorsfor the Cryo extension (the component of which is being made in the BNL central shop).

Paul Giannotti's very useful powerpoint presentation (39 MB) can be found in the above indico page as well as at the top of the "past presentations" page of our sPHENIX Magnet webpage :

https://collab.external.bnl.gov/sites/sPHENIX-Magnet/Past%20Presentations/

In the meeting, Paul showed us his understanding of the voltage taps and temperature sensors with pro-E drawings from Paul Kovach, photos of the

existing system as well as his own design/schematic drawings. He's

proposed to add 12 new voltage taps (VT18-VT29) in addition to the existing (VT01 - VT17)and there was no objection to his proposal.

We have spent quite some time discussing how to route the new voltage tap cables out of the system(extension/valve-box/doghouse). Paul first suggested to route the cables through an existingcross as shown in page

15 of his presentation by making new connections. Paul Orfin commented that he needed to check with Richard Meier to see whether there is enough room left there. But later, Paul Kovachsuggested using flanges at the doghouses/junction-box so that the cables can come out directly from the doghouse instead of routing all cables through the entire extension.

The old doghouse has a flange that we can use but Ed O'Brien and Don Lynch told us that there is not enough room as they're surrounded by the HCAL. Don said that we don't even have enough space to put the flange at the side and let cables coming out at 90 deg.

So, it's decided to put a new flange at the new doghouse and Paul Kovach said that it's an easy enough task to do. He'll modify his extension drawings and send to central shop to make this modification.

The voltage taps will be added when the extension components (made by the Central Shop) are being assembled in Bldg. 902.

2. We then discussed about the temperature sensors. The cryo group

has planned to add 4 temperature sensors as shown in Paul Giannotti's presentation page 2 (TE1786H, TE1787H, TE1788H & TE1789H) at the joints of both ends of the extension (for both + and - paths). Cryo group is using the CERNOX type of temperature sensor. [ The Cryo group had already planned to add two for the low current test but they were not added because that location was wrapped before they could manage to install the sensors.

Carl Schultheiss suggested to add a total of 2 more temperature sensors, each next to the (He) outlet beneath both the current leads, for diagnostic/debugging purpose when we see a quench or something wrong, even though the voltage taps would tell us about the quench (etc.) before the temperature sensors.

However, Paul Giannotti told us that those are wrapped inside the chimney and are not accessible unless we break open the chimney and all those wrappings. People felt that this was an action too risky to take. Furthermore, Joe Muratore (who has been very experienced in the diagnosing magnet quenches or other problems) told us that the voltage taps actually may tell us more than the temperature sensors and he felt/thought it's enough to have the voltage taps (without the additional temperature sensors) if it's impractical to add the temperature sensors.

So, it's decided not to add additional temperature sensors. Peter Wanderer and Joe promised that Joe will come to debug/diagnose the problem when the sPHENIX Magnet has a problem like that in the future :-)

3a. I mentioned that, through email communication with John Cozzolino, John told me that after changing the "current" to "current densities" in his ANSYS Maxwell model, John's simulation/calculation now obtain a central field very close to Wuzheng's (and the real measurements that

we have had at 100 A test). John told us now, he's using the new

B-field results (in 2D) and going through the ANSYS stress analysis.

He's comparing this all-ANSYS result with his stress analysis results that he used Wuzheng's B-field/force (from Opera) as input to ANSYS'

stress analysis. He'll probably show us in the next meeting.

3b. This coming Friday (July 22), there will be a small discussion/review with Pablo Rosas' changes on the sPHENIX Magnet Power Supply (originally from BaBar) such that Pablo will show a few of us (including some power supply experts) his changes to the power supply.

3c. Carl Schultheiss has also promised to show us (including Bob

Lambiase) a scheme of the quench detection/DAQ for the full-field test.

He said this may happen in a couple of weeks.

4. Jim Mills asked about the scheduling. I informed people that the

Cryo group (Paul Orfin/Roberto Than) has sent their changes to the old

version of the Microsoft Project file and I've passed them to Dave

Phillips. Frank Achim (who has just got back from vacation) and Carl

haven't done the scheduling modification yet. Carl said he'll make the

changes after discussing it with Pablo, esp. after the above-mentioned

Friday's review. Dave Phillips told me after the meeting that he still

thinks the welding is the critical path --- here we assume that the

extension works will be done on time.