Anode from a 100kV Transmission Electron Microscope (TEM) I just ...
... completed polishing to a mirror finish. Next I will sonicate it in a few solvents to clean the polish off. The Anode attracts electrons from the gun down through the hole in the middle down to the rest of the scope. I have been getting a lot of dark current even with the filament off, and at low voltage. The Anode was pretty filthy, and there were arc burns on the gun, behind the source even! Something got in there. This should solve the dark current problem. But, if It does not there are other things to check.
This is super-cool to see
You really do not want to see any dark current in a TEM at any kV when emission levels are at base line. You can get away with a few microamps tho, depending on what you are doing.
Hi, @roguescientist84!
You just got a 0.01% upvote from SteemPlus!
To get higher upvotes, earn more SteemPlus Points (SPP). On your Steemit wallet, check your SPP balance and click on "How to earn SPP?" to find out all the ways to earn.
If you're not using SteemPlus yet, please check our last posts in here to see the many ways in which SteemPlus can improve your Steem experience on Steemit and Busy.
This post has been voted on by the SteemSTEM curation team and voting trail.
If you appreciate the work we are doing, then consider supporting our witness stem.witness!
For additional information please join us on the SteemSTEM discord and to get to know the rest of the community!
Please consider setting @steemstem as a beneficiary to your post to get a stronger support.
Please consider using the steemstem.io app to get a stronger support.
Perfection is not attainable, but if we chase perfection we can catch excellence.
I do concur