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sphenix-magnet-l - [Sphenix-magnet-l] Making a late note of the successful hipot (again) on Apr. 24, 2024

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  • From: "Yip, Kin" <kinyip AT bnl.gov>
  • To: "sphenix-magnet-l AT lists.bnl.gov" <sphenix-magnet-l AT lists.bnl.gov>
  • Subject: [Sphenix-magnet-l] Making a late note of the successful hipot (again) on Apr. 24, 2024
  • Date: Sun, 28 Apr 2024 03:50:25 +0000

Hello,

 

As I forgot to report here earlier, I just remember to make a note of the successful hipot on Apr. 24 after the cycle of warm-up to ~80 K and then back to < 5 K :

https://brookhavenlab.sharepoint.com/sites/sPHENIXMagnet/External/Lists/Calendar/DispForm.aspx?ID=358&Source=https%3A%2F%2Fbrookhavenlab%2Esharepoint%2Ecom%2Fsites%2FsPHENIXMagnet%2FExternal%2FLists%2FCalendar%2Fcalendar%2Easpx

 

 

After the valve (H3668A) of the 400 L reservoir was fixed Monday (Apr. 22) evening (before 8 pm) --- as the work permit paperwork was completed Monday morning, Jeff Stewart and Tom Wozniak also completed calibration for the valve Tuesday (Apr. 23) morning.

Wed. morning, after Roberto Than gave more flow to the Magnet and accelerated the cool-down to below 5K, Carl Schultheiss, Theo Samms, Chaofeng Mi et. al. did a hipot for the Magnet again.  It was successful after Theo Samms was slowly went up at the step of 1V after 500 V to 520 V, and we stayed at 520 V for more than 1 minute.  { Theo was very fast in going up the steps of 10 V from 0 to 500 V and the surge at 500 V to 510 V initially tripped the meter.   He did it again at the 10 V step until 500 V and then went 1 V after 520 V, which worked peacefully. )

 

 

 

Kin



  • [Sphenix-magnet-l] Making a late note of the successful hipot (again) on Apr. 24, 2024, Yip, Kin, 04/27/2024

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