Search found 141 matches

by Liam David
Sat Nov 28, 2015 1:49 pm
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

It makes some sort of a "gurgling" noise as it spins up- no liquids- but vibration. The "gurgling" noise fades out as it accelerates. I can also wiggle the rotor side to side if I push gently on it.
by Liam David
Wed Nov 25, 2015 9:24 pm
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

Another problem. I discovered that the top magnet ring in the turbo pump is cracked in two places. Could this be the cause of the rotor vibration?
by Liam David
Sun Nov 01, 2015 2:51 pm
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

When I ran the turbo pump again today, I noticed that it made a loud "gurgling" sound for about the first ten seconds of acceleration and last 30 seconds of deceleration- otherwise it runs fine. I looked into the outlet with the pump spinning slowly and noticed that the rotor was vibrating slightly....
by Liam David
Sat Oct 24, 2015 12:48 pm
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

There are some less professional parts of the setup that I'm not too proud of and that you can't see in the pictures, but thanks for the compliments. Smaller 2.75 conflat fusors don't produce as many neutrons as a 6" sphere or other larger chambers, but I went with this chamber because of costs. -Li...
by Liam David
Sat Oct 24, 2015 1:10 am
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

Thanks!
by Liam David
Fri Oct 23, 2015 4:06 pm
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

Anyone know if I can run the TPU-040 pump horizontally, or will it destroy the pump? I have been unsuccessful in finding a manual.
by Liam David
Wed Oct 21, 2015 11:13 pm
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

It's been a while since I last shared my progress. I finally found a turbo pump! It's a Pfeiffer TPU 040 pump with TCP 040 controller, which was described as not working. Opening it up revealed a loose relay, and a quick atmosphere test confirmed that it was the problem. I now have a fully functiona...
by Liam David
Wed Jun 17, 2015 9:16 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Demo Fusor Problems
Replies: 3
Views: 2106

Re: Demo Fusor Problems

It is almost certainly a vacuum issue. If the pump outlet is spewing oil vapor, then you definitely have a leak. I'm assuming you don't have a vacuum gauge?
by Liam David
Fri Jun 12, 2015 12:09 am
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

Hmm. I guess LDS vacuum sells only plain VCR copper gaskets, which I assume will work fine.
by Liam David
Thu Jun 11, 2015 10:41 am
Forum: Images du Jour
Topic: Liam David Fusor Update
Replies: 42
Views: 15430

Re: Liam David Fusor Update

Yeah, it's not the right fitting. I used it earlier by brazing a washer to the end to act as a rudimentary seal surface along with a cast solder gasket. It undoubtedly leaked and I'm replacing it with a VCR to KF adapter soon. It's just in the picture for "show". Do I need silver plated SS gaskets o...