Search found 164 matches

by RobertTubbs
Mon May 08, 2017 7:13 pm
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 19158

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

Gave a thin film titanium coated copper target a beating last night. It puked a meganeut or so at 50kV after effectively instantly loading. Wasn't a lot left of it when I pulled it out for a look at the damage. Good stuff! Also attaching a video, a few photos, and a cool .gif of the focal spot adjus...
by RobertTubbs
Sat May 06, 2017 4:44 pm
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 19158

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

You're welcome to drop by Seattle sometime and see it, it's in my living room. Otherwise wait about a year and visit the Philippines as I'll be there studying abroad for a few years and my most of my hardware but for the most extreme of export restricted materials will come with. My couch there will...
by RobertTubbs
Sat May 06, 2017 4:32 pm
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 19158

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

Thanks Garrett, With regards to the invite out east, thanks also. I can't say I'm out there very often, but I'm likely to be at HEAS this year, I'll be certain to say hello if I see you there. I haven't been affiliated with NWNC for several years, and admins haven't been responsive to my request to ...
by RobertTubbs
Sat May 06, 2017 6:33 am
Forum: Images du Jour
Topic: Neutrons!
Replies: 44
Views: 12764

Re: Neutrons!

Really cool project Garrett, and nice work. This concept has been on my list of things to try as it functions much like a beam on target system would but with discharge mantained and directed by the central cathode. I ultimately opted for the persuit of monoatomic species of ions for their favorable...
by RobertTubbs
Sat May 06, 2017 12:02 am
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 19158

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

Dialded in on H mode, and am pulling proper beam now. Some pics and videos of operation:

https://youtu.be/Jx0ts2VmjHs

https://youtu.be/mu_XNZKC0aw

RT
by RobertTubbs
Thu Apr 27, 2017 4:17 am
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 19158

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

Cleaned things up somewhat, and got more beam out - going to keep dialing it in.

RT
by RobertTubbs
Wed Apr 26, 2017 12:23 am
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 19158

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

Hi Steven,

Yeah, that's machinable ceramic in there. The stuff cuts real nice on my mini-lathe.

No target in there yet or built, hence the beam spread. The original one was pretty thoroughly destroyed. As in the past this one will also use a negatively biased target.

Thanks,
RT
by RobertTubbs
Tue Apr 25, 2017 7:50 pm
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 19158

Re: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]

Finally got the new ion source working after some months of fussing with it. The source has three extractor electrodes, the top plate, and a pair of extractors in the double sided 1" thick conflat. The top plate and the lower aluminum piece float at 15kV, and the brass piece sits at ground potential...
by RobertTubbs
Wed Jan 11, 2017 4:36 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 31
Views: 18034

Re: Plasmagun/railgun for Stelarate

When you fire your railgun into your plasma toroid please remember to post pictures of the final results.

Thank you,
RT