Search found 66 matches

by JakeJHecla
Mon May 08, 2017 12:15 am
Forum: Images du Jour
Topic: Tubbs Beam-on-Target Effort [Neuts/Pics/Tips]
Replies: 47
Views: 22784

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

Steve- Here's a paper that works out the transition point: ... 21/014/pdf
by JakeJHecla
Tue Jan 17, 2017 4:45 pm
Forum: Images du Jour
Topic: George Ressinger Fusion Club
Replies: 11
Views: 5201

Re: George Ressinger Fusion Club

WRT bubbles size/shape- I've worked with quite a few bubble dosimeters, and I've seen a few legitimate counts show up with large disc-shaped bubbles. However, more often than not, these are the result of a dying dosimeter that has been heated excessively. The variation in quality of BTI dosimeters h...
by JakeJHecla
Sat Dec 10, 2016 1:06 am
Forum: Fusion --- Past, Present, and Future
Topic: Shine - a real use for fusion, now!
Replies: 23
Views: 20477

Re: Shine - a real use for fusion, now!

Just to be clear- this would never happen at a SHINE facility! However, accidental solution reactors have happened a number of times previously. In such a criticality accident, when the solution hits k=1, there's a large release of heat and radiation, but rarely an explosion. The burst usually drive...
by JakeJHecla
Tue Oct 20, 2015 1:14 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Electric Field 3D Modeling
Replies: 5
Views: 3634

Re: Electric Field 3D Modeling

SIMION will do it quite well
by JakeJHecla
Tue May 12, 2015 11:52 pm
Forum: Announcements and Site Administration Topics
Topic: is hopelessly lost into the noise.
Replies: 16
Views: 18502

Re: is hopelessly lost into the noise.

While I realize I'm not necessarily in the core group, I've spent a fair amount of time lurking, and I feel I have some insight into the problem. First, the reason we have so many "will this ___ work" posts is because has a highly abnormal forum structure. 99% of the forums out t...
by JakeJHecla
Fri Apr 10, 2015 5:06 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: The tiniest of detectors
Replies: 6
Views: 3528

Re: The tiniest of detectors

While I realize you're not looking for a high-sensitivity detector, a great option for your purposes would be a SiPM based scintillation detector. I built a simple one based around a 3x3mm active-area B-series unit from SensL and a 4x4x15mm LYSO(Ce) crystal. They require minimal processing electroni...
by JakeJHecla
Mon Apr 06, 2015 11:32 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Double in background radiation - US, East Coast, Long Island
Replies: 5
Views: 2944

Re: Double in background radiation - US, East Coast, Long Is

No increase here in Boston. Took a look at my Radex 1212BT dosimeter logs, and there has not been a significant increase.
by JakeJHecla
Wed Apr 01, 2015 10:26 pm
Forum: Images du Jour
Topic: IEC Fusion - Neutron Club Entry
Replies: 36
Views: 18050

Re: IEC Fusion - Neutron Club Entry

While I can't speak to the NeutronRAE's efficiency, I have seen 2cm-scale LiI(Eu) crystals used successfully to detect fusor neutrons at a TIER of ~100,000n/s. They can be quite sensitive if set up well. Bern- Where are you located? If you need a He-3 tube for verification, I can lend you mine for a...
by JakeJHecla
Wed Mar 04, 2015 1:44 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Fission-Fusion Hybrid Calculations
Replies: 11
Views: 10004

Re: Fission-Fusion Hybrid Calculations

What geometry, what moderator, what enrichment? It's not a straightforward calculation. You'll need access to MCNP or OpenMC at least.
by JakeJHecla
Sun Jan 18, 2015 4:33 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Small accelerator
Replies: 7
Views: 6163

Re: Small accelerator

Great work! I have access to Simion 7, but I would recommend finding someone with Sim 8. Sim 7 is exceptionally buggy to say the least.