Search found 464 matches

by ian_krase
Thu Feb 23, 2017 9:13 am
Forum: FAQs: Fusor Construction & Operation
Topic: FAQ - Computer Aided Design (CAD)
Replies: 2
Views: 1832

Re: FAQ - Computer Aided Design (CAD)

It should be noted that both Onshape and Autodesk Inventor 360 provide cloud-based parametric CAD that's free to use without paying any money. (Onshape sharply limits your ability to make private models, Inventor 360 is usable by hobbyists and by startup companies that don't have much income yet.) I...
by ian_krase
Thu Feb 23, 2017 3:57 am
Forum: New User Chat Area
Topic: HV source doubts
Replies: 3
Views: 722

Re: HV source doubts

For my purposes I use microwave oven HV diodes, and a transformer meant for oil burner furnaces, which is very similar to a 12kV 20 mA neon transformer. I don't know about Mexico but at least in the USA, oil burner transformers have kept with the old iron cores and windings much more than neon sign ...
by ian_krase
Thu Feb 23, 2017 3:54 am
Forum: New User Chat Area
Topic: Glass chamber for demo
Replies: 3
Views: 697

Re: Glass chamber for demo

I use a 1/4 inch thick, 4 inch diameter borosilicate glass tube from McMaster Carr. Costs 60 bucks. I have had very little luck finding any similar glass cylinder at an economical price anywhere else. They also sell slightly smaller ones which are significantly cheaper. https://www.mcmaster.com/#117...
by ian_krase
Thu Feb 23, 2017 3:38 am
Forum: Images du Jour
Topic: Making My First Successful Film
Replies: 45
Views: 6179

Re: Making My First Successful Film

Today, I finally got my hands on enough KF16 clamps (hooray for living within walking distance of Duniway Stockroom!) to attach my chamber and my convectron at the same time. Then I was a bit confused as to why I couldn't get below about 80 microns. Turned out my spark plug feedthrough was leaking a...
by ian_krase
Sun Feb 19, 2017 3:31 am
Forum: Images du Jour
Topic: Making My First Successful Film
Replies: 45
Views: 6179

Re: Making My First Successful Film

I know my gauge is leaking because it responds to dust-off. It's an uncommon pirani and piezo combo, meant for loadlocks and other things that really really care about pressure mechanical force. The piezo sensor is joined with a mildly silly o-ring seal that has a slow leak. Yeah, it's time for diff...
by ian_krase
Sat Feb 18, 2017 6:17 am
Forum: Please Introduce Yourself
Topic: Hello from Texas!
Replies: 1
Views: 449

Re: Hello from Texas!

Glad to have you here!


If you're smart about things like conductance, you can do a lot with a little demofusor-wise.
by ian_krase
Sat Feb 18, 2017 6:16 am
Forum: Images du Jour
Topic: Making My First Successful Film
Replies: 45
Views: 6179

Re: Making My First Successful Film

I drained the pump (foul-smelling, dark, almost greenish thick oil) and filled it, flushed it, and then filled it again. Results are what you see on the gauge.
by ian_krase
Thu Feb 16, 2017 6:37 am
Forum: Images du Jour
Topic: Making My First Successful Film
Replies: 45
Views: 6179

Re: Making My First Successful Film

I managed to hit a jackpot: Found a tested industry-grade pump (Pfeiffer Duo 2.5) at a low price on Ebay. I can get to 7 millitorr, and could likely get lower if my Pirani gauge wasn't leaking . Plus it has a gas ballast, has actual high-conductance KF input ports, and doesn't feel like it's going t...
by ian_krase
Fri Feb 10, 2017 9:24 am
Forum: Images du Jour
Topic: Making My First Successful Film
Replies: 45
Views: 6179

Re: Making My First Successful Film

It's a planar magnetron. A small stack of neodymium ring magnets are placed around a top-hat-shaped steel core, which also has an O-ring groove and the two cooling water tubes (1/8 inch refrigeration tubing). A copper pipe cap (w/ thinned end and soldered on tapped ears) is slipped over and screwed ...
by ian_krase
Fri Feb 10, 2017 7:51 am
Forum: Images du Jour
Topic: Making My First Successful Film
Replies: 45
Views: 6179

Making My First Successful Film

The glow discharge is actually pinker/paler than it looks here, and the parasitic glow around the periphery of the cathode shell is significantly dimmer than it looks in the picture. The cathode is copper sheet. Pressure is about 400 millitorr. Yield after several hours was an oxide film that could ...