sPHENIX discussion of the superconducting solenoid

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

Hello,

​I might hit Ctrl-Enter and sent the previously email immaturely.

As I said, I started before 8 am yesterday.  When I left yesterday, it's about 3:30 pm and John Haggerty came in well before that time.   Since we didn't find anybody who could man the shift after midnight, John sat through it and left this morning ~6:20 am :-)   Considering the daylight saving time, it's 16 hours !!!

Now, I came in after 6 am to take over and I'll be here until ~ 4pm.   The plan is that David Morrison will take the shift from 4 pm to midnight and

Eric Mannel will take over from midnight to Monday morning. 

Kin

---

From: Yip, Kin <kinyip AT bnl.gov>
Sent: Sunday, November 6, 2022 8:03 AM
To: sphenix-magnet-l AT lists.bnl.gov <sphenix-magnet-l AT lists.bnl.gov>
Cc: Albanese, Marianna <malbanese AT bnl.gov>; Michnoff, Robert J <michnoff AT bnl.gov>; Mannel, Eric <mannel AT bnl.gov>; Morrison, David <morrison AT bnl.gov>
Subject: 10-hour run finished and 40-hour started last night

 

Hi,

Just to jot down a note or two in this Sunday morning in sPHENIX Control Room 😁

1. Sat. (yesterday) morning, I amped the magnet current from 0 (setpoint) to 4620.3 A (setpoint) --- should give 4596 A --- from ~8:54 am to ~9:41 am, about 1 hour 47 minutes.
   
   
2. The CERN team started the 10-hour scan at 9:47 am.  
   
   
3. The mapping stopped for 1 hour or more.  From Nicola Pacifico, the trolley (which moves the mapper) is a bit like a Van der Graaf Generator and too much charge caused a spike --- detected by their limit switch sensor --- and this caused the trolley to stop (his design). They then properly ground their trolley to avoid charge accumulation :-)
4. From the output file of the CERN raspberrypi computer (outputFile10hrsScanAllProbes.txt), the so-called 10-hour scan ended at about 10:11 pm last night. 
   

Then, the so-called 40-hour scan started at 11:13 pm last night.

Kin