Search found 23 matches

by Ed Meserve
Sun Mar 09, 2014 9:07 pm
Forum: Vacuum Technology (& FAQs)
Topic: USM Fusion Group, Mark II Vacuum Progress Update
Replies: 1
Views: 1143

USM Fusion Group, Mark II Vacuum Progress Update

It's been a while since I have posted an update, mostly because we've only been able to work on the rig sporadically. We've made some progress in chasing down vacuum leaks and wanted to share some images. We had been getting progressively better vacuum, (granted, small degrees) but we couldn't pull ...
by Ed Meserve
Thu Nov 07, 2013 6:13 pm
Forum: Vacuum Technology (& FAQs)
Topic: Average Time for Epoxy to Out-gas?
Replies: 3
Views: 1949

Re: Average Time for Epoxy to Out-gas?

Nick,
Thanks for the NASA link. Checked out Uline, the manufacturer of the epoxy I used; it wasn't listed.

Jeroen,
Thanks for the curing tip. I will try curing it at 100 deg. and compare the results.

Ed
by Ed Meserve
Wed Nov 06, 2013 9:44 pm
Forum: Vacuum Technology (& FAQs)
Topic: Average Time for Epoxy to Out-gas?
Replies: 3
Views: 1949

Average Time for Epoxy to Out-gas?

Hello All, I have a quick question: How long does it take average two-part epoxy to stop (or lessen) most of its out gassing? Below is a photo of how we have setup our grid. I've insulated the stalk of the grid with the epoxy two-thirds of the way up to get past the collar in the chamber, which is c...
by Ed Meserve
Wed Nov 06, 2013 9:17 pm
Forum: Images du Jour
Topic: Archived - USM Fusion Group, Mark II First Light
Replies: 0
Views: 902

Archived - USM Fusion Group, Mark II First Light

We have first light on our new rig, the Mark II, though we are still struggling with the vacuum. It's all by eye so far, haven't setup the metering on it yet.
MarkII-First Light-2013-11-06.jpg
MarkII-First Light-2013-11-06.jpg (5.88 KiB) Viewed 889 times
Also uploaded a video of the plasma's behavior.
https://www.youtube.com/watch?v=1iexYCUxYx8

Ed
by Ed Meserve
Thu Aug 08, 2013 5:55 pm
Forum: Vacuum Technology (& FAQs)
Topic: Welch 1400 Repair
Replies: 2
Views: 888

Re: Welch 1400 Repair

Thanks, Brian! I completely forgot where I had read that.

Ed
by Ed Meserve
Wed Aug 07, 2013 7:55 pm
Forum: Vacuum Technology (& FAQs)
Topic: Welch 1400 Repair
Replies: 2
Views: 888

Welch 1400 Repair

Back in March we managed to crack one of the plates on our Welch 1400 (don't ask me how) and we've been working to machine a replacement in aluminum. IMAG0611.jpg Took a while, but we recently finished the replacement. IMAG0651.jpg I've reassembled the pump and filled it with oil and it holds the oi...
by Ed Meserve
Fri Jun 28, 2013 1:29 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Metallic - Non Metallic Grid?
Replies: 18
Views: 4470

Re: Metallic - Non Metallic Grid?

Would .5mm Tungsten/Rhenium be strong enough for an inner grid? It is being sold by the foot on Ebay:

http://www.ebay.com/itm/ONE-FOOT-0-020- ... vi-content
tungsten-rheniumwire.jpg
by Ed Meserve
Mon Jun 03, 2013 11:25 pm
Forum: Vacuum Technology (& FAQs)
Topic: Broken Welch 1400 Plate
Replies: 0
Views: 561

Broken Welch 1400 Plate

Well, we did it good. We managed to break the plate on our Welch 1400. IMAG0611.jpg So, To replace it, we are going to try a piece of machined aluminium. The tricky part will be to put it back together properly. I found a suggestion to use rolling papers to adjust the clearances on the rotor, here: ...
by Ed Meserve
Sun Mar 03, 2013 5:45 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Construction Progress of USM Fusion Group's New Rig
Replies: 1
Views: 1005

Construction Progress of USM Fusion Group's New Rig

<t>Hi all, I wanted to submit an update of our progress on our build of our second fusor rig, the "Mark II". <br/> <br/> Our first step is to get this new rig setup so that we can properly run it in demo mode while monitoring voltage, current, and pressure with a DAQ setup.<br/> <br/> We are using a...
by Ed Meserve
Sat Sep 01, 2012 12:34 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: A new topology for building a low-cost DIY HV power supply ... 30kV/80W for $25.
Replies: 39
Views: 19385

Re: A new topology for building a low-cost DIY HV power supply ... 30kV/80W for $25.

Chris, really nice work, and thank-you for sharing. After seeing what you've done here, we are going to use your method for our power supply.

Did you take the x-rays of the inverter yourself?

regards,
Ed