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[[Sphenix-magnet-l] ] Magnet ramped to the top current/field at 4:22 pm today ... 7.660 vs 7.659 .

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 ramped to the top current/field at 4:22 pm today ... 7.660 vs 7.659 .
Date: Tue, 25 Mar 2025 21:54:53 +0000

Hi,

Tim Costanzo and Ron Walker did the interlock verifications very quickly, after the hipot was done at 10 am.

Before we started magnet ramping, (as Tim Costanzo/Pablo Rosas reminded me), I did a test for the quench protection system to make sure that it tripped (by setting the threshold from 50 mV to 0 V).

Magnet was ramped to the top current/field at about 4:22 pm.

The new meter shows 7.659 V. In the past, the old meter would show 7.660 V (7.660/10*6000 A = 4596 A --- as used by Babar).

I attribute this to meter difference. I keep the "set point" at 4620.3 A --- a value established since the Magnet mapping.

Kin

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[[Sphenix-magnet-l] ] Magnet ramped to the top current/field at 4:22 pm today ... 7.660 vs 7.659 ., Yip, Kin, 03/25/2025