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[Sphenix-magnet-l] magnet current suddenly dropped ~100 A since 15:47

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] magnet current suddenly dropped ~100 A since 15:47
Date: Tue, 4 Jun 2024 04:42:54 +0000

Hello, Carl, Pablo, and Winston,

Just before I left, I noticed that the so-called "Magnet Current" dropped
instantly by almost 90-100 A to only ~4500 A (instead of close to ~4596 A).
This has been the case since 15:47 this afternoon.

I show you the plot in the 180Hz data. But all the currents stay about the
same, including qfg.8b-sphenix.B0.

Winston: is it possible that a factor suddenly got changed ???

Tomorrow, I'll go up to the 1008B mezzanine to take a look at the DCCT meter.

Kin

PS:

I checked John Haggerty's hall probes inside the Magnet bore which show no
such step.

Attachment: Screenshot 2024-06-04 002512.png
Description: Screenshot 2024-06-04 002512.png

[Sphenix-magnet-l] magnet current suddenly dropped ~100 A since 15:47, Yip, Kin, 06/04/2024
- Re: [Sphenix-magnet-l] magnet current suddenly dropped ~100 A since 15:47 --- plan to fix the DCCT next Maintenance Day (June 20), Yip, Kin, 06/04/2024
- Re: [Sphenix-magnet-l] magnet current suddenly dropped ~100 A since 15:47 --- plan to fix the DCCT next Maintenance Day (June 20), Yip, Kin, 06/04/2024