Search found 470 matches

by ian_krase
Mon Dec 17, 2018 8:33 pm
Forum: Announcements and Site Administration Topics
Topic: Straw Poll / Proposal for San Francisco Area mini-meetup
Replies: 0
Views: 24

Straw Poll / Proposal for San Francisco Area mini-meetup

I believe a number of fusioneers besides myself live in or near the San Francisco Bay area. I'm interested in having a mini-meetup some time - at the simplest, we'd all just go and get lunch or dinner at a restaurant some day and chat about fusion, science, vacuum, high voltage, and whatever else. I...
by ian_krase
Mon Dec 17, 2018 10:19 am
Forum: Images du Jour
Topic: Canal Ray pictures
Replies: 1
Views: 48

Canal Ray pictures

Here's a quick little demo I whipped up of Canal Rays. I suspect many people who have worked only with fusors won't be familiar with this, because a fusor-type chamber simply isn't really set up to demonstrate this phenomenon. Canal Rays (or Kanalstrahlen in Science German) are useful for making ion...
by ian_krase
Sun Dec 16, 2018 1:01 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Flexible Deuterium Gas Input Hose?
Replies: 3
Views: 149

Flexible Deuterium Gas Input Hose?

I'm curious if anybody has any advice on a flexible hose setup for introducing gas into their vacuum system. Normally one uses fixed metal tubing between the metering valve and the fusor -- which works well for most fusors but is inconvenient (even if bend-by-hand refrigeration tube is used) for vac...
by ian_krase
Sat Dec 15, 2018 10:24 am
Forum: New User Chat Area
Topic: What is swagelok?
Replies: 6
Views: 204

Re: What is swagelok?

Oddly, all of the Swagelock valves I bought on Ebay were pretty cheap. I have an SS-BMG which is pretty nice as a metering valve, it has a full bellows seal. Interesting fact: there are some swagelok "stores" / warehouses / showroom type places, and some of these places will gladly sell you Swagelok...
by ian_krase
Sat Dec 15, 2018 7:50 am
Forum: New User Chat Area
Topic: What is swagelok?
Replies: 6
Views: 204

Re: What is swagelok?

Swagelok stuff is expensive enough that a mere *discount* isn't enough to gain you that much.

If you can get Swagelok parts cheaply, though, you could make your entire gas inlet line using them.
by ian_krase
Sat Dec 15, 2018 7:43 am
Forum: New User Chat Area
Topic: What is swagelok?
Replies: 6
Views: 204

Re: What is swagelok?

Swagelok is a company that makes tube fittings, pipe fittings (these are NOT the same thing), and valves. Many of their products are useful for fusors! However, they're fairly expensive. Some of their products have imitations that are much cheaper and just as good -- "A-lok", "Yor-Lok", "Let-Lock", ...
by ian_krase
Fri Nov 30, 2018 9:01 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Electron Impact Ion Source pictures wanted
Replies: 3
Views: 596

Re: Electron Impact Ion Source pictures wanted

I have gotten so far as to pick up on the "box" structure of these ion sources. I'm curious whether you have a clear idea of how the gas is injected -- is there just a tube going into the side of the ion box? How large would you say the exit and entry holes typically are? Are they equal to each other?
by ian_krase
Mon Nov 26, 2018 6:48 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Electron Impact Ion Source pictures wanted
Replies: 3
Views: 596

Electron Impact Ion Source pictures wanted

I'm interested in any pictures or diagrams that anybody has of professionally made or mass produced electron impact ion guns.

(these are more common in RGAs and mass spectrometers, which is what I am building, than in things like fusors.)
by ian_krase
Sun Nov 25, 2018 5:14 am
Forum: Advanced Technical Discussion Area
Topic: Harbor Freight freebie meters
Replies: 12
Views: 1059

Re: Harbor Freight freebie meters

I'm not sure if the meter ratings should be Considered ridiculous safety nerd stuff. I'm not willing to use HF meters, or most other cheapie meters, on moderate-voltage high-current stuff like wall current.
by ian_krase
Thu Nov 22, 2018 5:45 am
Forum: Advanced Technical Discussion Area
Topic: Harbor Freight freebie meters
Replies: 12
Views: 1059

Re: Harbor Freight freebie meters

Ahhh, yes.

Then of course there are the Keithley vacuum tube frontend electrometers, with input impedance measurable only in scientific notation.