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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Think nuclear batteries without the current issues with shielding etc. The effect of X-ray triggering has been confirmed, however as it turns out it is very difficult to generate the required X-rays at one specific energy (in this case more than 300KeV) in a device that is portable.
I did read somewhere that miniature X-ray sources can now be made, Google "Cool-X" so its feasible that a miniature device using a few hundred of the enhanced dual crystal modules running alternately in a constant heat/cool cycle around a central rod of prepared Hf178m2 could provide a positive energy gain. The core might only need to be the size of a baseball yet provide energy equivalent to a medium sized diesel generator, and the lack of moving parts would make it very reliable as a backup power source for remote regions.
I suppose describing it as a Zero Point Module would be accurate
Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
From the page you cited "and to date no other group has been able to duplicate these results." Also , its not as if Hafnium is cheap and, even if it were, getting it into the excited state needed for the "battery" would take a huge amount of energy. The military might be able to spend that much to achieve that little, but this isn't going to be in Wall Mart any time soon.
Registered Member #75
Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711
Isn't the cool-X completely useless for this application, with most energy below 10kV and "Variable end point energy: up to 35 kV"? Seems to me that there would be no way of scaling this to 300kV, at least is such a small device I can't see pyroelectric crystals spitting out electrons at above 300kV.
Sure the thing is expensive, but it's probably poeckt change compared to the Hafnium. When making stuff in small quantities the R&D and tooling costs far outweigh the parts you are actually paying for, so the $2500 price might not be as unreasonable as you thing.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
you use two devices working in opposition so the electrons "see" nearly double the acceleration energy,
so a 35KV device would then exceed 70KV, and increasing the speed of the heat cycle would push this into the 100KV range.
IIRC there are many other ways to generate 300KeV X-rays, one of which is to use a flash xray tube. Slight problem of needing >300KV to power the thing but I'm sure it can be done.
see with reference to 300KV...
An amusing experiment might be to "harvest" two PZT crystals from one of the old spark igniters used in gas barbecues (and sold as a replacement module if you know where to get them!) and thermal epoxy them end on to the peltier's heat spreader. Even if the output is limited compared with LiTaO3 it should still prove that it works.
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374
it says "can allow positive ions to reach kinetic energies between 300 and 310 keV", I bet they imply higher ionization states or you'd have to divide it by the ionization state to obtain the equivalent acceleration field voltage.
Registered Member #75
Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711
Piezoelectric and pyroelectric crystals are fascinating stuff. IIRC the off-the-shelve PbTaO3 or BaTaO3 that are used in all sorts of piezo gizmos are plenty pyroelectric.
Like everything worth doing Thomas Rapp has already done it unfortunately his homepage is still German only though. If you guys are interested I'll translate the gist of it.
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Nuclear isomer batteries feasible?
