Search found 457 matches

by ian_krase
Sun Feb 14, 2021 7:06 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: One more cube fusor
Replies: 14
Views: 1166

Re: One more cube fusor

Can you elaborate a bit on the difficulties of beam on target work? At least two people have done it. Certainly it's more substantial than a fusor.

I hope you won't landfill that chamber - I am sure that it could find much use even if not as originally intended.
by ian_krase
Thu Feb 04, 2021 7:34 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Heat pipe cooling
Replies: 3
Views: 430

Heat pipe cooling

Recently I've been messing around with heat pipes -- specifically, trying and failing to replace the water coolant charge in the standard heat pipes with acetone, which would work at much lower temperatures. (This would work better if I used, oh, I don't know, vacuum , but I would need to get cryoge...
by ian_krase
Thu Feb 04, 2021 7:21 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Soldering Ceramics
Replies: 5
Views: 861

Re: Soldering Ceramics

I've been interested in DIY ceramic to metal seals. It seems possible that with the right hacks we could make these in our own vacuum systems. Sadly, I usually haven't seen much that's really interesting/successful.
by ian_krase
Tue Jan 05, 2021 10:44 am
Forum: Vacuum Technology (& FAQs)
Topic: Preventing Stuck Swageloks?
Replies: 4
Views: 587

Re: Preventing Stuck Swageloks?

I really need to get a length of thin bellows hose with some Ultra Torr fittings.
by ian_krase
Sun Jan 03, 2021 12:43 am
Forum: Vacuum Technology (& FAQs)
Topic: Preventing Stuck Swageloks?
Replies: 4
Views: 587

Preventing Stuck Swageloks?

I have a problem with swagelok fittings, especially 1/8 inch brass swageloks on copper tubing, getting seized together -- I can unscrew the nut, but the cones on the tube don't come out of the socket. How can I fix or prevent this? Is a thin sheen of vacuum grease on the larger cone ferrule an OK id...
by ian_krase
Sun Jan 03, 2021 12:39 am
Forum: Images du Jour
Topic: Germanium Sputtering in the new Reserach Facility
Replies: 11
Views: 2159

Re: Germanium Sputtering in the new Reserach Facility

Those spikes remind me of the tungsten field emitters formed for vacuum microelectronics (basically MEMS vacuum tubes) I use a standard KF40 manual angle valve plus a needle gas inlet valve to adjust pressure. The meaningful adjustment range for the gate valve is all pretty close to closed, but you ...
by ian_krase
Sat Jan 02, 2021 10:43 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Beam on Target Project (BOT 2021)
Replies: 48
Views: 7469

Re: Beam on Target Project (BOT 2021)

Ahhh, it's built up out of tubing pieces and machined plugs? That could simplify things...

I'm still a bit dejected over the failure of my own Penning ion source attempt -- Andrew Setzman I am not.
by ian_krase
Sat Jan 02, 2021 6:33 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Beam on Target Project (BOT 2021)
Replies: 48
Views: 7469

Re: Beam on Target Project (BOT 2021)

This is fascinating work. Makes me ashamed for mostly sitting on my behind as far as the science goes these last several months. I wish I was the equal of that machining for the ion gun -- do you have a cross section drawing of what you actually built? I have only ever seen one other beam on target ...
by ian_krase
Mon Oct 19, 2020 4:32 am
Forum: Images du Jour
Topic: Germanium Sputtering in the new Reserach Facility
Replies: 11
Views: 2159

Re: Germanium Sputtering in the new Reserach Facility

Looks pretty cool. Probably works a lot better than my homemade experimental setup.
by ian_krase
Wed Jun 03, 2020 3:43 am
Forum: Vacuum Technology (& FAQs)
Topic: Old oil for the turbo
Replies: 5
Views: 1895

Re: Old oil for the turbo

Turbopumps are so fragile and expensive that I would not dare use an uncertain oil (except oil that's positively identified, but moderately expired).