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 |
| 10 |
2.58
|
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. |