Polverone
Now celebrating 21 years of madness
Posts: 3186
Registered: 19-5-2002
Location: The Sunny Pacific Northwest
Member Is Offline
Mood: Waiting for spring
|
|
Desktop fusion with pyroelectric crystals
http://www.aip.org/pnu/2005/split/729-1.html
I've seen a number of news reports since this was first announced, but I don't have electronic access to Nature. Can anyone retrieve the
full article? From the description, it seems that this could be an easy-to-construct, amateur-accessible neutron source, even simpler than a
Farnsworth fusor.
PGP Key and corresponding e-mail address
|
|
|
Marvin
National Hazard
Posts: 995
Registered: 13-10-2002
Member Is Offline
Mood: No Mood
|
|
A fusor will produce of the order of a million neutrons a second, drift tube accelerator (like in scientific american) will produce about 100x that
for the same amount of power - all without tritium.
From what Ive read the output of the pyroelectric system is of the order of a few hundred neutrons a second and functions exactly the same way (high
voltage acceleration of deuterons), its just getting the high voltage from a different source. It is a neet trick but this is barely detectable with
good equipment and certainly not useful as a source.
|
|
|
Ish Bob
Harmless
Posts: 1
Registered: 2-5-2005
Location: under a rock
Member Is Offline
Mood: No Mood
|
|
I have a copy of an article about the same thing. I'll try to scan it later, it says its "a crystal of Lithium tantalate in deuterium gas,
cooled it to -30C." It says it was heated to about 7C over 3.5 min. The nuclei of deuterium were accelerated to over 100KiloeV.
|
|
|
FrankRizzo
Hazard to Others
Posts: 204
Registered: 9-2-2004
Member Is Offline
Mood: No Mood
|
|
Here's a copy of the Nature article.
Attachment: nature03575.pdf (368kB)
This file has been downloaded 970 times
|
|
|
Mr. Wizard
International Hazard
Posts: 1042
Registered: 30-3-2003
Member Is Offline
Mood: No Mood
|
|
This is simply amazing! Imagine talking about fusion powered by a simple heat source that could powered by a solar collector. How long before one of
us has some Lithium Tantalate or other exotic crystals? 
|
|
|
neutrino
International Hazard
Posts: 1583
Registered: 20-8-2004
Location: USA
Member Is Offline
Mood: oscillating
|
|
I get the feeling it won’t be very long… Depending on the difficulty of synthesis, of course. Now, where does one get tantalate compounds?
|
|
|
cyclonite4
Hazard to Others
Posts: 480
Registered: 16-11-2004
Location: is unknown
Member Is Offline
Mood: Amphoteric
|
|
You could start by getting tantalum out of capacitors?
\"It is dangerous to be right, when your government is wrong.\" - Voltaire
|
|
|
12AX7
Post Harlot
Posts: 4803
Registered: 8-3-2005
Location: oscillating
Member Is Offline
Mood: informative
|
|
Then I'm guessing you'd want to burn it to tantalum oxide (since it's gonna be inert to most acids like the rest of those metals),
carefully since it's expensive, and fuse it with lithium oxide in a graphite crucible (unless the carbon reacts, in which case molybdenum would
probably work). Induction heating and argon or vacuum for sure. Oh, and a crystal-pulling servo, and a seed.
Or find a source and buy it... 
Tim
|
|
|
Twospoons
International Hazard
Posts: 1324
Registered: 26-7-2004
Location: Middle Earth
Member Is Offline
Mood: A trace of hope...
|
|
Like from these guys?
|
|
|
cyclonite4
Hazard to Others
Posts: 480
Registered: 16-11-2004
Location: is unknown
Member Is Offline
Mood: Amphoteric
|
|
| Quote: | Originally posted by 12AX7
Then I'm guessing you'd want to burn it to tantalum oxide (since it's gonna be inert to most acids like the rest of those metals),
carefully since it's expensive, and fuse it with lithium oxide in a graphite crucible (unless the carbon reacts, in which case molybdenum would
probably work). Induction heating and argon or vacuum for sure. Oh, and a crystal-pulling servo, and a seed.
Or find a source and buy it...
Tim |
Or you could take advantage of its reaction with hot, concentrated hydroxides. See here: http://www.b-jenterprises.com/prod_tantalum_corrosion.htm. And here: http://www.scientific.net/default.cfm?pdf=1&cat=19&p...
This way we can make tantalates. I doubt buying it is fair on the wallet.
\"It is dangerous to be right, when your government is wrong.\" - Voltaire
|
|
|
12AX7
Post Harlot
Posts: 4803
Registered: 8-3-2005
Location: oscillating
Member Is Offline
Mood: informative
|
|
Oh, so it can be produced directly? I was under the impression most of the refractory-ates need to be fused...(strontium titanate dielectric ceramic,
for instance). Certainly though, you'll need to fuse it and grow crystals either way, no small task!
Tim
|
|
|
Twospoons
International Hazard
Posts: 1324
Registered: 26-7-2004
Location: Middle Earth
Member Is Offline
Mood: A trace of hope...
|
|
The site I linked to above quotes the melt point as 1600C. Not a simple task, but hydrogen flame fusion (melting, not nuclear!) may work.
|
|
|
Marvin
National Hazard
Posts: 995
Registered: 13-10-2002
Member Is Offline
Mood: No Mood
|
|
Of course 100kv is not a difficult job for static electricity either, but fusion using by jumping around in nylon clothing is so much less likley to
get published.
Whimshurst machine anyone?
Van Der Graaf?
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
