Magnetic 'Lens'

[tuckbone]

First post, so take it easy on me! 

I was reading up on Electron Microscopes, and read about the way they direct the electrons is through a magnetic lens of sorts. The magnetic force drives the electrons through a small gap, blah blah..

any body have any thoughts on focusing the magnetic field instead? sort of taking the field and condensing it, so that it's stronger or more condensed? Like focusing light down to make it brighter?

Just a thought..

[truesearch]

By "focusing" the magnetic field would this have the same effect as "shielding"??

truesearch

[DreamThinkBuild]

Hi Truesearch,

Welcome to the forum.

Hi Jerry,

I built patent #5929732 last year. It's a really interesting device. If you take a square magnet and run it over the beam area you will notice a push in the middle. A larger steel ball will make a larger (dome like) falloff of the beam. A small steel ball beam will make the beam narrower (pinpoint).

The magnets are pretty weak and it still put out a good beam. I wrapped a coil around the top magnet and pulsed it with a square wave into a air core coil it does pickup the signal, about a half foot away, on the scope. I was thinking of removing the top magnet and putting a iron core with a control coil to see if I could make a pulsed magnetic switch but never got back to it, so many projects, so little time.

If you could either focus or reflect magnetic fields then you could create a magnetic motor. From all my experimenting I haven't found a way yet.

Here are some pics of it.

[truesearch]

@DreamThinkBuild

That is a nice looking concept build!

I'm trying to understand what the flux "field" or "map" would look like with this magnetic lens/beam. Got any ideas?

truesearch

[truesearch]

@DreamThinkBuild:

How "tight" or "focused" is this magnetic beam?

I was wondering if something like this rough diagram might work. It's simply a wheel with magnets situated around the edge at an angle so that the magnetic "beam" would push against the face of those magnets for rotational movement.

truesearch