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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi all. just curious, but has anyone here with enough equipment observed 1) x-rays or 2) neutrons from the "two opposed crystals of lithium tantalate with tungsten microtips in low pressure deuterium" experiment?
It got me thinking, how big would an experimental chamber with thousands of isolated, individually cooled and heated LiTaO3 emitters need to be to get positive energy output, even briefly?
I'm thinking something like about 8 feet diameter, with central and outer grids charged to 500KV much like the Farnsworth device..
Cooling would be a pain though, and so would shielding due to spurious X-ray emissions and hard gammas from the fusion reaction itself. You could pump a neutron absorbing isotope in a liquid metal carrier through the inner grid though, to transfer the fusion energy to a heat exchanger as the resultant isotopes would rapidly decay emitting heat as they go.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
W. Tornow, S. M. Lynam, and S. M. Shafroth, Substantial increase in acceleration potential of pyroelectric crystals, Journal of Applied Physics, Vol. 107, 063302 (2010)
B. Naranjo, S. Putterman and T. Venhaus, Pyroelectric fusion using a tritiated target,Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 632, Issue 1, (11 March 2011), pp. 43-46.
I don't believe any of the scientists working with pyroelectric fusion have ever claimed that the output was greater than the input.
Registered Member #1134
Joined: Tue Nov 20 2007, 04:39PM
Location: Bonnie Scotland
Posts: 351
Conundrum wrote ...
Hi all. just curious, but has anyone here with enough equipment observed 1) x-rays or 2) neutrons from the "two opposed crystals of lithium tantalate with tungsten microtips in low pressure deuterium" experiment?
As Proud Mary says, there are, or have been, portable neutron generators built using pyroelectric crystals for the accelerating voltage. These use either Tritium or Deuterium gas, and a Deuterated or Tritiated target.
Fusors, and similar neutron generators, are in fact commercially available as neutron sources. None are net energy producers.
Amptek produces miniature can sized x-ray tubes based on pyroelectric field emission.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hmm, ok. I mean, has anyone on 4HV ever built one? It would seem a relatively simple task, with a vacuum pump and chamber with getter, Peltier junction with RF based power, crystal etc. D2O can be obtained in the form of deuterated water then electrolysed to get deuterium gas.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Conundrum wrote ...
Hmm, ok. I mean, has anyone on 4HV ever built one? It would seem a relatively simple task, with a vacuum pump and chamber with getter, Peltier junction with RF based power, crystal etc. D2O can be obtained in the form of deuterated water then electrolysed to get deuterium gas.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Based on the picture shown, and the discovery that it doesent need the microtips after all I woukd estimate under £100 UKP if you have the Peltiers and crystals already. Even a broken open PIR sensor can sometimes have one of these crystals, just remove the silicon window. Affix to Peltier with low melt alloy and voila.
Might be worth vacuum coating the "cold" side with copper, and adding an auxillary heater to get the required fast cool/heat cycle.
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Has anyone duplicated the "Crystal fusion" experiment?
