sPHENIX discussion of the superconducting solenoid

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

Hi,

 

Somebody asked about it during yesterday’s meeting, I attach the plot of the linear potentiometer during warmup for pot. 1, 2 and 3.

I tried to readjust all the pots. on Mar. 22 (late afternoon) before warming up so that they would have the entire range.  Ray Ceruti

determined that Pot. 4 just didn’t latch to anything or was unreachable and we gave up on it.

 

My attached plots show the movements for pots 1, 2 and 3.   Pots 2 & 3 are on opposite ends, and so are pots 1 & 4.

Pots 2 & 3 rose to about ~0.3 mm as expected. 

 

But pot 1 didn’t rise for a while until ~half way and then rose to just about 0.2 mm.   Is it possible that pot. 4 pulled the pot. 1

or something like that ?! …..

 

Kin

Attachment: Lin. Pot. during warmup.jpg
Description: Lin. Pot. during warmup.jpg