sPHENIX discussion of the superconducting solenoid

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

Agenda, powerpoint and model pictures : https://indico.bnl.gov/conferenceDisplay.py?confId=2731)

 

 

1.      Florida State University (FSU) is willing to make aluminum brackets (Jack Supports) in bolded version and the material cost is in the order of $30K.  The labor is free.  We haven’t got a delivery date (which is a critical factor !), partly because we haven’t given FSU all the detailed drawings.  J. Hock has finished the drawing and they’re being checked (by Rich Ruggiero).  Hopefully, we can send the drawings to FSU by the end of this week.

 

2.      J. Mills heard from J. Hock that the company “Strecks” (responsible for making the steel roof) is going to pick up the steels next Tuesday (Jan. 10, 2017).

 

3.      P. Rosas hasn’t started working on the power supply so far.  After talking with I. Marneris this morning, he’s sent a technician to work with P. Rosas on our power supply for the next 3 weeks.

 

4.      Paul Giannotti has made 1-1 model of the Valvebox Extension and I took a picture (not well focused unfortunately) :

 

https://indico.bnl.gov/getFile.py/access?sessionId=1&resId=2&materialId=2&confId=2731

He told us that this helped him in figuring out how to get the cables through the Extension.   In the above indico page, I’ve uploaded several more pictures around the joints.  The silvery or stainless-steel-looking pins are the suggested locations of the new “voltage taps”.  I’ve sent them to C. Schultheiss/P. Joshi to see whether they think the locations are OK.

5.      Paul went through his powerpoint presentation.  Out of the 17 (old) + 12 (new) voltage taps, there are 7 (old) + 6 (new) which need to go through the Valvebox Extension, along with many other Cryo connections (temperature sensors etc.).  According to Paul, there are about 250 connections that need to go through the Valvebox Extension.  Paul is not sure what cables and connectors to be used.  Paul himself and people like L. Masi Jr. (who is not in the meeting) don’t quite like the flat-ribbon cable and the press-on connectors.  Some people suggested soldering.  

It’s said/decided that Paul would make up a list of decisions that we need to make and have a small meeting with the experts such as Sonny Dimaiuta, Frank Toldo, Richard Meier as well as P. Joshi and C. Schultheiss to decide on what connectors (and cables) to use.

 

Paul’s presentation can be found in the above indico page as well as here:
https://collab.external.bnl.gov/sites/sPHENIX-Magnet/Past%20Presentations/2017-1-4%20VB%20Extension%20Signal%20Cable%20Routing.pptx

6.      While looking at pages 14/15 of Paul’s powerpoint presentation, Don Lynch and others raised the issue of having a “T” at the end of the connector at the bottom of the new junction-box (doghouse).  They pointed out that we should do it now (in the installation before the High-Field Test).  Because if we don’t do it now, we may have to break cables or soldering (etc.) if we want a “T” later.  I have sent emails to ask R. Ceruti and P. Kovach for this.