Fusor Forums

Joe, As you pointed out, I would imagine this depends on the accelerating potential of the RGA (likely a few hundred volts, I would guess), compared to the accelerating potential of your ion source. What is the bias of your source? For me personally, I likely would not alter an existing, working RGA...

Joe,

Very nice setup. What type of ion source are you using?

Thanks!

-Scott

The fusor built by myself, Tim Koeth, Jay Howson and Jim Krutzler uses a ~28" diameter spherical chamber.

We use a small turbo pump (50 l/s I think, I will have to check). It reaches low E-7.

-Scott

Nice! Stick with it. My friend and I spent ~1.5-2 years messing around with a demo fusor before we really got things moving on a real, neutron producing fusor.

These two pictures I attached were taken approximately 7 years apart.

I am curious why the tungsten needle in your ion source is at a negative bias with respect to the shell? I would also suggest a single hole or group of holes around the center axis, rather than many perforations. I have attached a picture of a successful deuterium ion source I have built. 1.2 kV acr...

Luke, I am not familiar with the Canberra units, but my friend Jay Howson is. Below is a writeup he did on our website of how he made use of the Canberra modules for spectroscopy: http://www.nuclearphysicslab.com/npl/npl-home/spectroscopy/software_and_hardware/diy-canberra-system/ Sorry if this does...

Robert,

It is likely a rotatable conflat. He will have to insert the inner SS ring with the knife edge. It looks like the feedthrough is welded or Silver Soldered to the outer SS ring. Look at the picture I attached for reference.

Scott

Hi everyone, Over the past few weeks our amateur science group (Tim Koeth, Jim Krutzler, Jay Howson, Brian Beaudoin, Miriam Hiebert, Luke Gilde, and myself) have assembled a website which details all of our projects. It is still a work in progress (and will continue to be), but a lot of content has ...

Ian,
A brand new Pfeiffer Pumping station is $500 cheaper than the Mcmaster listing on IdealVac: https://www.idealvac.com/NEW-Pfeiffer-H ... pp/P107317

Still not affordable for the amateur, but available nonetheless.

Scott

I am by no means disagreeing with the statement: would "devour Deuterium like a vacuum cleaner." However, it is worth noting that larger systems maintain star mode at lower pressures. The fusor Tim Koeth and I built (larger than that chamber) maintains star mode between 2-4 mTorr. My 9" spherical ch...