Search found 66 matches

by JakeJHecla
Mon Jan 12, 2015 6:20 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Exploring Topsham's Swamp Quarries
Replies: 1
Views: 2455

Exploring Topsham's Swamp Quarries

Earlier this fall, Katie B. (a fellow MIT nuke) and I had the opportunity to spend a long weekend avoiding honest work and exploring one of the more unusual occurrences of radioactive minerals on the east coast. The Topsham Quarry, also commonly referred to as the "Trebilcock Mine" or "Old Swamp Qua...
by JakeJHecla
Wed Dec 31, 2014 6:24 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: EDX Analysis of U Ore
Replies: 6
Views: 2685

Re: EDX Analysis of U Ore

Great work! I have some rather unique samples of crystalline uraninite from Topsham, ME that I gathered earlier this year. If you're ever interested in taking a look at other U samples, I'd be happy to send you one.
by JakeJHecla
Wed Dec 17, 2014 6:53 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Bizarre national radiation background readings?!
Replies: 10
Views: 4563

Re: Bizarre national radiation background readings?!

While proving them wrong is certainly cathartic (and might yield some interesting data!), they won't retract any statements or even reply to valid concerns with their articles. A while back there was a video posted that showed the radioactivity of dust on a recently-driven vehicle from my area. Natu...
by JakeJHecla
Wed Dec 17, 2014 3:07 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Bizarre national radiation background readings?!
Replies: 10
Views: 4563

Re: Bizarre national radiation background readings?!

"Natural news" is an absolute travesty. It lives by breeding anti-pharma, anti-vaccine, anti-nuclear crackpottery and selling it to the masses as "the truth." I'll put money on it that it's completely fabricated.
by JakeJHecla
Tue Nov 18, 2014 3:05 pm
Forum: Images du Jour
Topic: Archived - New camera test
Replies: 15
Views: 4319

Re: New camera test

If you had a high enough neutron fluence to make you ill, any Al or W items in the vicinity would be noticeably active for weeks. If it's been longer than that, I have access to heavily shielded HPGEs that can sniff out tiny amounts of residual activity. If you're inclined, I can provide third-party...
by JakeJHecla
Sat Nov 15, 2014 3:34 pm
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: HENDO POLYWELL
Replies: 11
Views: 6215

Re: HENDO POLYWELL

Sorry to be the bearer of bad news, but your plasma confinement idea is doomed by the large timescale associated with rotating the halbach array. A reasonably hot (read: fusion) plasma will have ion speeds so high that the rotation of the arrays won't even be apparent in their flight time. It's phys...
by JakeJHecla
Sat Jul 26, 2014 8:14 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Silver Activation
Replies: 3
Views: 1712

Re: Silver Activation

I would strongly recommend against using Ag activation for early tests. If you run some back of the envelope calculations on activation, you'll find this method is only viable for fusors making north of 50-60k neutrons/sec. It's certainly doable at lower fluxes, but it's more effort than it's worth....
by JakeJHecla
Thu Jul 24, 2014 6:59 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: HV Capacitors containing Thorium
Replies: 2
Views: 1625

HV Capacitors containing Thorium

Hello all- I just received an email through RadSafe indicating that the sender had found HV capacitors containing Th-232. Now, I've never heard of such a thing, and I can't imagine why it would be of use. However, the knowledge base here is considerably larger than my own, and I'm hoping someone her...
by JakeJHecla
Sun Jul 06, 2014 10:49 am
Forum: Vacuum Technology (& FAQs)
Topic: VacuCAD
Replies: 6
Views: 2968

Re: VacuCAD

You're a student, right? Pick up a copy of autodesk inventor or solidworks and use the files they have available. You may need to do some file-type wrangling, but it will work out (PM me for help if you need it). It seems rather impractical to use a web-based tool to CAD something as complex as a ch...
by JakeJHecla
Mon May 19, 2014 10:50 pm
Forum: Fusion --- Past, Present, and Future
Topic: 2014 ISEF
Replies: 14
Views: 5740

Re: 2014 ISEF

As someone who participated in ISEF last year, I'm not surprised to see this project made it there.The run-up to the big fair isn't always a good BS filter, especially for something as niche as nuclear fusion. We were met with enough blank stares just trying to explain the fusor (at regionals) that ...