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Entry  Tue Mar 16 14:37:36 2021, Yehonathan, Update, BHD, SOS SmCo magnets Inspection 20210316_142906.jpg20210316_165626.jpg20210316_165838.jpg
    Reply  Wed Mar 17 14:40:39 2021, Yehonathan, Update, BHD, SOS SmCo magnets Inspection 
    Reply  Thu Mar 25 14:58:16 2021, Yehonathan, Update, BHD, SOS SmCo magnets Inspection 
Message ID: 15922     Entry time: Tue Mar 16 14:37:36 2021     Reply to this: 15931   15964
Author: Yehonathan 
Type: Update 
Category: BHD 
Subject: SOS SmCo magnets Inspection 

In the cleanroom, I opened the nickel-plated SmCo magnet box to take a closer look. I handled the magnets with tweezers. I wrapped the tips of the tweezers with some Kapton tape to prevent scratching and magnetization.

I put some magnets on a razor blade and took some close-up pictures of the face of the magnets on both sides. Most of them look like attachment 1.

Some have worn off plating on the edges. The most serious case is shown in attachment 2. Maybe it doesn't matter if we are going to sand them?

I measure the magnetic flux of the magnets by just attaching the gaussmeter flat head to the face of the magnet and move it around until the maximum value is reached.

For envelope #1 out of 3 the values are: (The magnet ordering is in attachment 3):

Magnet # Max Magnetic Field (kG)
1 2.57
2 2.54
3 2.57
4 2.57
5 2.55
6 2.61
7 2.55
8 2.52
9 2.64


Going to continue tomorrow with the rest of the magnets. I left the magnet box and the gaussmeter under the flow bench in the cleanroom.

Attachment 1: 20210316_142906.jpg  3.177 MB  Uploaded Tue Mar 16 18:28:54 2021  | Show | Hide all | Show all
Attachment 2: 20210316_165626.jpg  3.426 MB  Uploaded Tue Mar 16 18:29:08 2021  | Hide | Hide all | Show all
Attachment 3: 20210316_165838.jpg  3.885 MB  Uploaded Tue Mar 16 18:29:52 2021  | Show | Hide all | Show all
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