E-Gun + Polywell Setup

2 07 2012

All Photos

Now that we have a working electron gun, the next challenge is to pulse the Polywell core while we shoot a beam of electrons into it. Trivial as it may sound, the hardest part of this is just getting all the components in the chamber aligned correctly and with electrical feed-throughs.

My previous e-gun armature was way too bulky, so I scraped it. After several different designs, I came to this:

The round base goes around the feed-through pins and fits snugly into the hole in the conflat:

The two screws visible in these pictures allow for adjustments to the distance between the anode and the cathode.

As for the cathode holder, I cut the filament off of a light bulb, and soldered it’s ends to two pieces of 12 gauge copper wire, each about an inch-long. I attached them to the feed-through pins with two crimp connectors. Not as a cool as a 3D printed holder, but much more compact, and no plastic to out-gas or melt from the heat of the filament.

Here’s the whole thing

Then we cleaned everything with acetone and ethyl alcohol.

Began the assembly. After much trial and error, I got everything in and aligned correctly, and got the vacuum down to about 8 x 10^-4 torr.

The only thing left to do is to hook up the Polywell power supply, so we’re pretty much ready for the run!

Domenick Bauer

Advertisements

Actions

Information

4 responses

3 07 2012
jason

these posts always end with a cliff hanger!

3 07 2012
6 07 2012
dbauer7890

Awesome! thanks

4 07 2012
ST

Way Cool! Getting closer!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s




%d bloggers like this: