sphenix-magnet-l AT lists.bnl.gov

Subject: sPHENIX discussion of the superconducting solenoid

List archive

[[Sphenix-magnet-l] ] iceball - logy

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] ] iceball - logy
Date: Wed, 31 Jul 2024 20:49:41 +0000

Hi,

Today, we ramped down the Magnet for Carl and the CAS to check the Watch Dog Timer connection in the Quench Detector Rack and the Magnet Power Supply respectively. ( It took quite a lot of time to have the paperwork yesterday to open the Magnet Power Supply as it’s connected to ~480 V. )

They didn’t really find anything wrong but they tightened the connections nevertheless.

>105 minutes after the magnet current ~0, I took a picture on the Current Leads. There was minimal iceball.

<~15 minutes after the Magnet reached top current, I took another picture. The iceball has grown bigger obviously, but not yet

as large as I’ve typically seen after the Magnet had been on for weeks. So, I guess it took time for it to grow and I guess it’ll reach the
asymptotic size quite quickly though (probably in days) --- I usually can visit only during Maintenance Day 😊

I attach both pictures.

Kin

Attachment: 20240731_124934.jpg
Description: 20240731_124934.jpg

Attachment: 20240731_161417.jpg
Description: 20240731_161417.jpg

[[Sphenix-magnet-l] ] iceball - logy, Yip, Kin, 07/31/2024