Some years back I bought a data acquisition starter kit from these folks, works well for plotting leak-up rate.
https://www.dataq.com/
Jon Rosenstiel
Search found 1268 matches
- Wed Mar 03, 2021 12:42 am
- Forum: Fusor Construction & Operation (& FAQs)
- Topic: Software to collect and display measured data.
- Replies: 4
- Views: 64
- Thu Feb 18, 2021 11:11 pm
- Forum: Fusor Construction & Operation (& FAQs)
- Topic: One more cube fusor
- Replies: 14
- Views: 1163
Re: One more cube fusor
Wow! Very nice Finn, love what you've done with your cooling system. More than once I've sat staring at my cube trying to visualize how to configure cooling water passages similar to what you have done. Good, and very neat, work. Steampunk-ish indeed.
JonR
JonR
- Thu Feb 18, 2021 10:06 pm
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Titanium Coated Endcaps for the Cube Fusor
- Replies: 20
- Views: 848
Re: Titanium Coated Endcaps for the Cube Fusor
Roberto,
I tried what this guy in the video shows, and it did result in a thin coating. But it's extremely slow, and the titanium wire filaments burn out much too easily.
https://youtu.be/-lh1LhoRBaY
JonR
I tried what this guy in the video shows, and it did result in a thin coating. But it's extremely slow, and the titanium wire filaments burn out much too easily.
https://youtu.be/-lh1LhoRBaY
JonR
- Thu Feb 18, 2021 4:12 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Titanium Coated Endcaps for the Cube Fusor
- Replies: 20
- Views: 848
Re: Titanium Coated Endcaps for the Cube Fusor
I wonder if titanium’s effect on neutron production is, in some way, related to its gettering action? During the coating process I’ve noticed that when the Ti pellets melt and start vaporizing chamber pressure drops about 2E-05 Torr.
JonR
JonR
- Thu Feb 18, 2021 12:53 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Titanium Coated Endcaps for the Cube Fusor
- Replies: 20
- Views: 848
Re: Titanium Coated Endcaps for the Cube Fusor
Thanks Roberto.
The endcaps have a concave radius, and from my experience titanium sheet is nearly impossible to form.
JonR
The endcaps have a concave radius, and from my experience titanium sheet is nearly impossible to form.
JonR
- Thu Feb 18, 2021 12:11 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Titanium Coated Endcaps for the Cube Fusor
- Replies: 20
- Views: 848
Re: Titanium Coated Endcaps for the Cube Fusor
Jim, Today I tried (twice) what you suggested, taking a reading at 40 kV after a 50 kV run. The changes were small, just the typical run to run differences. I'm attaching a paper with info gleaned from the K J Lesker website. As I pretty much followed what they had done I would guess the Ti coating ...
- Wed Feb 17, 2021 10:45 pm
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Titanium Coated Endcaps for the Cube Fusor
- Replies: 20
- Views: 848
Re: Titanium Coated Endcaps for the Cube Fusor
Thank you for the kind words Richard, but you guys never get to see all the stuff I screw up and have to toss out.
JonR
JonR
- Wed Feb 17, 2021 1:29 am
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Titanium Coated Endcaps for the Cube Fusor
- Replies: 20
- Views: 848
Re: Titanium Coated Endcaps for the Cube Fusor
Thanks guys.
Liam, as of yet I haven't noticed any issues with outgassing, she's been quite stable. Did have lots of outgassing/runaway problems (not sure which it was) with a titanium cathode. Now I'm wondering about how well an embedded titanium target (al la Mark Rowley) would work.
JonR
Liam, as of yet I haven't noticed any issues with outgassing, she's been quite stable. Did have lots of outgassing/runaway problems (not sure which it was) with a titanium cathode. Now I'm wondering about how well an embedded titanium target (al la Mark Rowley) would work.
JonR
- Tue Feb 16, 2021 11:32 pm
- Forum: Neutrons, Radiation, and Detection (& FAQs)
- Topic: Titanium Coated Endcaps for the Cube Fusor
- Replies: 20
- Views: 848
Titanium Coated Endcaps for the Cube Fusor
A while back Joe Gayo suggested I try coating my cube’s endcaps with titanium, mentioned I might be surprised at the Ti coating’s effect on NPR. (Neutron Production Rate) As usual, I was a little skeptical, but the fire was lit and I decided this would also be a good opportunity to finally put toget...
- Sun Feb 07, 2021 11:55 pm
- Forum: Fusor Construction & Operation (& FAQs)
- Topic: Cube fusor build
- Replies: 63
- Views: 14779
Re: Cube fusor build
I think Jim may have hit upon what's going on here. Below images are of a brand new, freshly machined aluminum (6061-T6) cathode. I believe the greenish plasma is related to the “burning off” of aluminum oxide and/or other contaminates. As a side note, neutron production rate of this cathode was abo...