sPHENIX discussion of the superconducting solenoid

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

Agenda/powerpoint:  https://indico.bnl.gov/conferenceDisplay.py?confId=3225

 

 

1.      C. Schultheiss reported that the PCB (bare) boards arrived in the morning and they sent out the boards plus components (which had been

here for a while) yesterday afternoon for assemblying.  ~July 10 was the expected delivery date (a little due to July 4 holiday).

2.      Holes for the roof steel have been transferred and the roof steel were taken down from the top. 

Yesterday, some time after 5 pm, I took the pre-engineering critical lift form from M. Gaffney that he signed and put it on the desk of D. Phillips.
D. Phillips needs to look for people to sign the rest of the Green Sheet.

Unfortunately, a few other things like survey, the floor pieces (needed to be bolted), the brackets etc. need to be dealt with.   The hope
for moving the Magnet Coil to the base on Thursday has vanished and we’re hoping to move the Magnet next Tuesday (June 27).

3.      Pablo Rosas has not tested the power supply with the PSI yet and he was planning to make modification for a 2^nd PSI.   Since he’s not going to be
here in early July, he’s expected that we can move the power supply to the testing site in late July after all the controls can be done.

But, in the meeting, W. Pekrul told us that this is not necessary.   He’ll discuss this with Pablo to sort this out.

4.      I’ve helped push through a few purchases (Cryo/DAQ) but Carl still has the voltage-tap cables (and a small/hundred dollar power supply for the front-end) to be purchased.  Carl has promised to do the voltage-tap cable purchase this Friday after he can finish his RHIC test.

5.      I reminded peope again that we are going to have a safety (ASSRC/ESRC) review on July 6, 2017 at 1:30 pm in the Synder Room in C-AD.

 

6.      Joe Muratore presented his proposed test plan during the meeting.  Some procedures at the beginning at room temperature are similar to what we did for the low field test.   We’ve discussed that after we ramp to 1000 A, we would use “fast discharge” to ramp down at least once to see how much “warming” up will happen.
If not much warming, we could use this “fast discharge” at 1000 A routinely, esp. when we don’t want to do anything soon afterwards.

Carl Schultheiss informed us of a few parameters such as the slow logger running at 120 Hz and the fast logger running at 2.88 kHz (but only for ~20 s).

7.      W. Pekrul reported that he’s used the GPIB to talk to the gaussmeter that Achim Franz has used to measure magnetic field last time.   So, this time, both currents (etc.) and magnetic field are going to be inside the Control Group system that everybody can analyze it.

8.      J. Mills asked about what to do after we move the Magnet.   “Naturally”, we’ll install the Extension.   After that, the priority is to set up the platform to support the Valve Box for the Cryo group to start setting up the Cryo system.   After the meeting, D. Phillips and J. Hock discussed (with Brian Streckenbach and myself) and apparently, they have some disagreement about whether we need to put the end wall and the lead-end roof steel first before we set up the platform.   They’ll sort this out tomorrow.

9.      Ed O’Brien asked about the Magnet support rod tightening business.   Ray Ceruti tightened the support rods of the Magnet on June 14, 2017.  Ed O’Brien worried that we might forget to loosen them after the Magnet is moved.  D. Phillips said that he’s got a line for R. Ceruti to sign and make sure that he’s loosened it after

thet Magnet is moved.