Search found 454 matches

by ian_krase
Thu Oct 11, 2018 2:58 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Titanium walls
Replies: 4
Views: 387

Re: Titanium walls

Sputtering Ti is also possible.

You could research Quartz Crystal deposition monitors. The detuning of a Crystal oscillator measures the mass per area.

You could also possibly measure mass loss of your Ti source with sensitive analytical balance.
by ian_krase
Thu Sep 27, 2018 5:44 am
Forum: Please Introduce Yourself
Topic: Introduction
Replies: 3
Views: 355

Re: Introduction

Yeah, maybe the Doug Coulter way is the way to go.

(I'm looking at rural land right now actually)
by ian_krase
Thu Sep 27, 2018 5:43 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: What vacuum chamber do I use?
Replies: 9
Views: 395

Re: What vacuum chamber do I use?

An alternative to the hemispheres is a smaller (2 to 4 inches) "pipe tee" fusor.
by ian_krase
Thu Sep 27, 2018 5:42 am
Forum: New User Chat Area
Topic: Budget and Insulator Questions
Replies: 7
Views: 629

Re: Budget and Insulator Questions

You may not need to insulate the stalk inside your fusor - Paschen's Law is a funny thing. I didn't in my very rudimentary demo fusor If you do, you can buy alumina ceramic tubing or "fish spine" beads from McMaster. Not too costly. Or even use kapton tape (very cheap dirty solution). You can use KF...
by ian_krase
Thu Sep 27, 2018 5:32 am
Forum: New User Chat Area
Topic: Would a heated Barium oxide filament survive in a deuterium environment?
Replies: 4
Views: 217

Re: Would a heated Barium oxide filament survive in a deuterium environment?

I would worry more about residual air every time you go to to air. Barium is mostly used in vacuum tubes that are never ever vented. A better idea might be yttrium as used in ion gauges - or just bare tungsten, it works and is vastly simpler. I'm curious at this choice of ion gun - it's my impressio...
by ian_krase
Wed Sep 19, 2018 5:13 am
Forum: The Trading Post
Topic: Stuff for sale at Halted Supply in San Jose, California
Replies: 3
Views: 248

Re: Stuff for sale at Halted Supply in San Jose, California

It's unfortunate. I'm a bit surprised as they were far better than the recently closed Wierdstuff Warehouse. Perhaps Excess Solutions will buy them out and expand their hours to something we can actually attend. I don't agree that they were across the board expensive at all. Their prices for oscillo...
by ian_krase
Tue Sep 18, 2018 7:45 am
Forum: The Trading Post
Topic: Stuff for sale at Halted Supply in San Jose, California
Replies: 3
Views: 248

Stuff for sale at Halted Supply in San Jose, California

Halted Supply in San Jose is apparently going out of business over the next several months, and having a big sale (20 to 50 percent) this week. Notable stuff: - High voltage probes and meters - doorknob capacitors. - ancient ion gauge controller - Swagelock VCR solenoid valve - huge quantities of ce...
by ian_krase
Tue Sep 11, 2018 7:46 pm
Forum: Images du Jour
Topic: My first plasma
Replies: 12
Views: 1205

Re: My first plasma

One thing that might be tried is to have separate beam blocks and structural vacuum chamber. The former can be made of cheap thin glass.
by ian_krase
Sun Sep 09, 2018 8:12 am
Forum: Images du Jour
Topic: Sharing hamfest booty images
Replies: 27
Views: 5465

Re: Sharing hamfest booty images

Nice valve! I paid more like 30 for mine!
by ian_krase
Sun Sep 09, 2018 4:07 am
Forum: Images du Jour
Topic: My first plasma
Replies: 12
Views: 1205

Re: My first plasma

Not sure what you mean by an "arc from the grid to the glass" -- may need better pictures.

Your glass looks too clear for sputtering to be a big problem. Is there a hot spot?