Search found 643 matches

by Andrew Seltzman
Thu Feb 04, 2021 3:01 am
Forum: Images du Jour
Topic: Fusor Update - Liam David
Replies: 38
Views: 4555

Re: Fusor Update - Liam David

I happen to remember that a few some forum members bought spellmans that didn't due to issues on the circuit board, those likely have salvageable flybacks in them or perhaps a good candidate for a circuit board swap.
by Andrew Seltzman
Fri Oct 23, 2020 11:59 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Portable XRF detector window repair
Replies: 11
Views: 1500

Re: Portable XRF detector window repair

I can confirm that hysol-1C epoxied Be windows will work down below 1e-6 torr. I was using an in-house build windows on my PhD research, they worked quite well. The window on the the detector prevents condensation wince the detector is TEC cooled, it may need to be evacuated, though it could work at...
by Andrew Seltzman
Thu Aug 27, 2020 4:07 am
Forum: Images du Jour
Topic: SonoFusion Setup
Replies: 6
Views: 1229

Re: SonoFusion Setup

At one of the APS-DPP conferences there was confirmed neutron production (via a BTI-PND dosimeter) of plasma generated in D2O with a laser pulse (Nd:YAG I believe). This was a Nd:YAG laser focused into D2O to generate a plasma, so it certainly should be possible to generate neutrons with enough inpu...
by Andrew Seltzman
Tue Jun 23, 2020 10:19 pm
Forum: Vacuum Technology (& FAQs)
Topic: Turbo repair - The Nightmare Begins
Replies: 5
Views: 1425

Re: Turbo repair - The Nightmare Begins

May be worth it to buy another controller, they're pretty cheap:

[url]https://www.ebay.com/itm/133173568909/url]
by Andrew Seltzman
Tue May 19, 2020 1:55 pm
Forum: Announcements and Site Administration Topics
Topic: Finished PhD, now a postdoc at MIT
Replies: 14
Views: 8522

Re: Finished PhD, now a postdoc at MIT

When you feel that you are stuck with your dissertation abstract and the long hours in front of your monitor do not bring any results, it may be time to send your request to us. <Facepalm> Admin, feel free to delete my response too... Also my dissertation abstract is still better: The Electron Bern...
by Andrew Seltzman
Sun Apr 26, 2020 8:47 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage
Replies: 21
Views: 5045

Re: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage

I think one benefit of electrolysis at home is no hazmat or freight shipping issues. Same can apply to using deuterostiks at home, if some enthusiast starts a filling service. Can items be listed on ebay with a price that includes refundable core fee? - Rich Feldman Would anyone be interested in pu...
by Andrew Seltzman
Fri Apr 10, 2020 10:21 pm
Forum: Vacuum Technology (& FAQs)
Topic: First ever Turbo experience
Replies: 38
Views: 11132

Re: First ever Turbo experience

The heater at the top is for baking out the pump when removing water vapor or contaminants if it will be used at UHV vacuum levels.
The fan keeps the motor cool when the heater is on, or when pumping very high gas loads, or gasses with high molecular mass such as argon.
by Andrew Seltzman
Sun Mar 15, 2020 8:10 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage
Replies: 21
Views: 5045

Re: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage

I think the non pro versions were discontinued. The one I took apart was the brunton hydrocore (a rebranded hydrostick pro). Both the Brunton hydrocore, and the hydrostik pro version come full with hydrogen. Depleated uranium is usually only used for storing tritium. It has to be heated to several h...
by Andrew Seltzman
Sun Mar 15, 2020 4:44 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage
Replies: 21
Views: 5045

Re: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage

No special method to purge the residual hydrogen was used on my metal hydride cartridges. They were emptied of H2 down to atmospheric pressure then filled with D2. The H2 to D2 ratio would probably be a few ml H2 per 11L D2.
by Andrew Seltzman
Sat Mar 14, 2020 2:57 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage
Replies: 21
Views: 5045

Re: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage

It was a used one that I got on ebay with a Brunton Reactor fuel cell. It was left screwed into the fuel cell for probably long after it was empty and air with moisture likely got in (by permeating through the fuel cell membrane after there was no flow of hydrogen out of the cartridge) and destroyed...