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Mon Jul 23 17:15:14 2012, Koji, Clean, General, Talking with Margot
Wed Dec 19 18:47:03 2012, Koji, Clean, General, First Contact Training with Margot
Mon Jul 23 17:15:14 2012
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Talking with Margot
I consulted with Margot about the cleaning of the optics
Optics are considered as a clean object. Large dusts can be removed by ionized N2 flow etc.
Barrel of optics can be wiped with
Optical surfaces are best to be cleaned by First Contact.
A peek mesh should be embedded in the first contact so that the First Contact sheet can be easily removed.
When peeling a F.C. sheet from a mirror surface, ionized N2 should be brown for discharging.
If there are residuals visible on the mirror surface, it should be removed by Acetone. Don't use alchols.
Use paper lens tissue for wiping as the lint free wipe can be eaten by Acetone.
In fact, All of the procedure is described in a certain document.
For a small amount, Margot can provide us a bottle of F.C. and some PEEK meshes.
Details of the Ionized N2 system
This N2 should have higher purity than 4N (UHP - Ultra High Purity). This means we should use
4N - UHP or 5N - Research Grade
The ionized gun used in the clean room at Downs:
made by Terra Universal.com
Flow path: N2 cylinder -