Bubble Fusion Bubbles Up Again - IEEE Spectrum / General Chatting / Forums

Forums

4hv.org :: Forums :: General Chatting

« Previous topic | Next topic »

Bubble Fusion Bubbles Up Again - IEEE Spectrum

1 2 next

Move Thread

LAN_403

Proud Mary

Wed Jul 31 2013, 09:32PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

Conundrum

Wed Jul 31 2013, 10:16PM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062

Interesting.
With the advent of high power blue and UV lasers, the possibility of generating the bubbles without needing a radioactive seeding agent (a serious criticism of the original experiment) exists.

-A

Proud Mary

Thu Aug 01 2013, 08:57AM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

I've never fuly understood these experiments, but looking across the whole field of LENR, I don't think scientific misconduct and error are sufficient to explain all of the small anomalies that have been reported by hundreds of investigators over these last decades. The impulse to monetize every new discovery - the setting up of 'cold fusion' companies amid great claims - has done so much damage to the field that it may take decades to recover.

Ash Small

Thu Aug 01 2013, 11:34AM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

"Quantum tunnelling or tunneling (see spelling differences) refers to the quantum mechanical phenomenon where a particle tunnels through a barrier that it classically could not surmount. This plays an essential role in several physical phenomena, such as the nuclear fusion that occurs in main sequence stars like the Sun.[1] It has important applications to modern devices such as the tunnel diode[2] and the scanning tunnelling microscope. The effect was predicted in the early 20th century and its acceptance, as a general physical phenomenon, came mid-century.[3]

Tunnelling is often explained using the Heisenberg uncertainty principle and the waveâ€“particle duality of matter. Purely quantum mechanical concepts are central to the phenomenon, so quantum tunnelling is one of the novel implications of quantum mechanics."

Proud Mary

Thu Aug 01 2013, 01:23PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

To be more specific, I meant that I'd never fully understood the Widom-Larsen LENR theory of local breakdown of the Born-Oppenheimer approximation, so I think I shall go outside for a while, and sit in the shade with an icy glass of Pernod.

Ash Small

Thu Aug 01 2013, 07:18PM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

Proud Mary wrote ...

To be more specific, I meant that I'd never fully understood the Widom-Larsen LENR theory of local breakdown of the Born-Oppenheimer approximation, so I think I shall go outside for a while, and sit in the shade with an icy glass of Pernod.

I'm still reading Paul Dirac's 'Quantum Mechanics' (fourth edition).

Proud Mary

Thu Aug 01 2013, 11:52PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

You're a braver person than I'll ever be, Ash. All those bra-ket notations, Hilbert spaces, and Hermitian conjugates going round and around in my head like glacÃ© cherries bobbing about in a glass of advokaat...

Carbon_Rod

Fri Aug 02 2013, 07:39AM

Registered Member #65 Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155

A few years back I tried and failed to replicate minimal results with this apparatus, but perhaps it failed as I did not use additional isotopes.

Still doesn't inspire much confidence,
initially I hoped the semi-parabolic shape of the flask would indicate a Laplace spherical harmonic distribution of foci at resonance. However, no structured cavitation observed in water even with dissolved CO2 gas etcâ€¦

Perhaps someone else will be lucky enough to figure out how to reliably replicate the results...

Conundrum

Fri Aug 02 2013, 08:03AM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062

We should start an "Add your SL setup here" thread

In my case the limiting factor was the lack of the special transducers required.
As it turns out there are workarounds one of which is to use a home fired BaTiO3 setup where the required ceramic is pressed and fired using a tablet press similar to that used for superconductors.

For those hoping to duplicate this, you will need barium carbonate (BaCO3) and titanium dioxide (TiO2) in reasonably pure form, a kiln and some appropriate safety equipment such a glovebox.
The two need to be mixed together very well indeed, calcined at about 700-800C for twenty hours then re-pressed and fired again.
The poling requires heating of the pellet to about 285C from memory then applying an HV field across the short axis and slowly cooling over an hour to "lock in" the field.

If you wanted to, the last step could be skipped and the HV field applied while the transducer was still in the kiln slowly cooling.

The formula is BaCO3+TiO2 + Heat = BaTiO3+CO2

-A

Ash Small

Fri Aug 02 2013, 08:55AM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

Proud Mary wrote ...

You're a braver person than I'll ever be, Ash. All those bra-ket notations, Hilbert spaces, and Hermitian conjugates going round and around in my head like glacÃ© cherries bobbing about in a glass of advokaat...

I'm taking my time, just a few pages now and again. I know a lot of people find Dirac's maths hard to follow, but, so far, it seems fairly straightforward, maybe because I'm not a mathematician, so Dirac's 'symbolic method' doesn't 'go against the grain'.

1 2 next

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob