Search found 461 matches

by ian_krase
Tue Nov 13, 2018 6:39 am
Forum: New User Chat Area
Topic: Interested in talking to an expert chemist for non-fusion question
Replies: 0
Views: 61

Interested in talking to an expert chemist for non-fusion question

I'm interested in talking with an expert chemist for a question/project unrelated to fusion. It concerns combustion and organic chemistry.
by ian_krase
Tue Nov 13, 2018 6:22 am
Forum: New User Chat Area
Topic: Crystal synthesis inside a vacuum?
Replies: 3
Views: 174

Re: Crystal synthesis inside a vacuum?

I believe that sputtering sometimes forms crystals as well, at least when the substrate is a crystal.
by ian_krase
Tue Nov 13, 2018 6:20 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: My progress II
Replies: 14
Views: 1174

Re: My progress II

I would like to add that one can often "chop-shop" tees and crosses together using an inexpensive Mapp Gas blowtorch and silver brazing compound. There are lots of cheap vacuum components on Ebay that were made for some specific machine. To the casual user, they are of little use, very strangely sha...
by ian_krase
Tue Nov 13, 2018 6:12 am
Forum: New User Chat Area
Topic: Vacuum chamber parts
Replies: 3
Views: 127

Re: Vacuum chamber parts

Yes, glass bell jars or cylinders of any kind are just risky even for demo fusors -- too easy to heat up to a hot spot, crack, shatter, and implode.

A better idea is a tee or cross, plus flat glass viewports -- *much* less expensive, and much less dangerous if it breaks.
by ian_krase
Tue Nov 13, 2018 2:10 am
Forum: Vacuum Technology (& FAQs)
Topic: Advice on locating reason for poor vacuum?
Replies: 4
Views: 200

Re: Advice on locating reason for poor vacuum?

To clarify a bit: this is about locating virtual leaks, slow permeation, and outgassing, not true leaks.

Detergent... why not toluene?
by ian_krase
Mon Nov 12, 2018 10:09 am
Forum: Vacuum Technology (& FAQs)
Topic: Advice on locating reason for poor vacuum?
Replies: 4
Views: 200

Advice on locating reason for poor vacuum?

I've been trying to get to 10E-6 with my vacuum system, but having a hard time breaking 3E-5. As far as I can tell (via leak testing with a trace gas) my system is airtight. However I suspect it's dirty (I'm a slob) and/or contaminated by my questionable vacuum grease decisions. Does anybody have a ...
by ian_krase
Fri Nov 09, 2018 2:22 am
Forum: Images du Jour
Topic: putt-putt boat fusion
Replies: 6
Views: 587

Re: putt-putt boat fusion

Lately I've seen Hitachi power tools appearing in the hardware store.

I had putt-putt boats as a kid, but they were more like gurgle-gurgle boats, and very slow. The engine was made not of sheet metal but of thin-wall copper tubing bent in a coil. They were considered a thing to make yourself.
by ian_krase
Sun Nov 04, 2018 4:00 am
Forum: The Trading Post
Topic: AC to DC power supply boards for sale
Replies: 0
Views: 167

AC to DC power supply boards for sale

Hey everyone. I've got some 15V 6.7A switching power supply boards for sale -- not really useful for fusion directly, but good for power-hungry instrumentation!

https://www.ebay.com/itm/323532932427
by ian_krase
Tue Oct 30, 2018 4:01 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Beam on Pd-D-Li Target Fusor
Replies: 3
Views: 613

Re: Beam on Pd-D-Li Target Fusor

How are you ionizing the gas? While it probably can be done, electron guns are not made for functioning as ion guns.
by ian_krase
Thu Oct 11, 2018 2:58 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Titanium walls
Replies: 10
Views: 1520

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.