DIY Electron Beam welder

How big a thing do you want to weld? You basically need an electron linac.

>>964117
Are you comfortable working with very voltage electricity, OP? Things will go very badly unless you already know what you're doing.

>>964117
Why?

Check out RepRap's page on electron beam melting, it should have all the information you need:
http://reprap.org/wiki/MetalicaRap

apparently some polish dude built a simple, but not very great, electron beam welder:
https://www.youtube.com/watch?feature=player_detailpage&v=4OVaqTvh-pw#t=1645

>>964140
here's more details on the homemade one:
http://www.pwl.mikrokontroler.pl/spawanie/spawanie.htm

>DIY electron beam welder
Is this as dangerous as it sounds?

If so, I approve 200%.

>>964147
Vacuum and implosion risk. Many tens of thousands of volts. Flammable and explosive metal powders.

... IT's as safe as nitroglycerine legos.

https://youtu.be/r6oDCbcmtWw

>>964117
if you strike electrons with high energy on a metallic surface you'll be generating X-rays
https://en.wikipedia.org/wiki/X-ray_tube
but then yes, electron beams can and do heat a target.

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>>965301
its ok if he didn't fo far as 28KV- 30KV over that voltage X-ray emission on impact is eminent.
you can create Hot Cathode Beam and go on lover voltages.