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Massive Particle Accelerator Revving Up

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Re: Massive Particle Accelerator Revving Up

Postby EnergyUnlimited » Wed 11 Apr 2007, 04:50:55

$this->bbcode_second_pass_quote('FairMaiden', 'a')nyone know where fusion is at with regards to implementation?

About as far as Ulam and Teller got.
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Re: Massive Particle Accelerator Revving Up

Postby Tanada » Wed 11 Apr 2007, 06:53:46

$this->bbcode_second_pass_quote('EnergyUnlimited', 'B')lack holes are at the moment theoretical objects only and in Nature they may not even exist.
Current astronomical observations are lending some support to hypothesis, that everything what we are considering a BH is in fact MECO (magnetospheric ethernally collapsing object), entity devoid of singularity.
Existance of such objects imply non existance of BH and vice versa.
There is a good chance that Nature is a bit more boring than S. Hawking believes.

The only rigorous solution of Einsteins equations yielding BH is so called Schwartzchild solution.
There is one funny snag in it. It is solution yielding black hole of mass equalling zero, eg it is a mathematical construct yielding entity not capable to exist in physical world.
There are other solutions allowing existence of non zero mass BH, but they are not rigorous (incomplete) and open to challenge.

I suspect more and more, that BH are only product of human imagination and frantic attempts to employ General Relativity to resolve issues ruled by Quantum Mechanics in fact.


OK so what do You, Energyunlimited, think happens to a mass where gravity exceeds the speed of light?

The orriginal classic defenition of a singularity was a point mass that collapsed to such a great density that the gravity field emitted by itself has an acceleration greater than the speed of light, hence any light entering or emitted from the singularity is bent into orbit or reabsorbed below the Schwartzchild radius.
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Re: Massive Particle Accelerator Revving Up

Postby EnergyUnlimited » Wed 11 Apr 2007, 07:30:36

$this->bbcode_second_pass_quote('Tanada', '
')OK so what do You, Energyunlimited, think happens to a mass where gravity exceeds the speed of light?

That is wrong question.
What, if it is impossible for gravity to collapse an object tight enough to form event horizon in the first place?
I bet you are aware of so called virtual particles.
In sufficiently dense environment ones with positive energy are "forced into reality" and leaving contracting matter ball as radiation, while negative energy counterpart work towards decreasing of mass of collapsing body...so event horizon actually never forms.
Under this scenario nothing can be squizzed fast enough to form event horizon, before it cease to exist.
Such objects are known as magnetospheric eternally collapsing objects (as they would display magnetic fields) and their existance would imply nonexistance of BH.
Detailed astronomical observations would distinguish between MECO and BH.
Here you have example of such observation, which is supporting for existance of MECO, not BH:
http://www.physorg.com/news73057202.html

$this->bbcode_second_pass_quote('', 'T')he orriginal classic defenition of a singularity was a point mass that collapsed to such a great density that the gravity field emitted by itself has an acceleration greater than the speed of light, hence any light entering or emitted from the singularity is bent into orbit or reabsorbed below the Schwartzchild radius.

That is definition of BH/event horizon, but not definition of singularity.
If you found yourself in BH with ring singularity (rotating Kerr type BH, in practice any BH, if it exist at all), you would observe singularity emitting light in fact, but light would not leave the hole and would be falling back on singularity).
You would also fail to leave that hole, even if you tried...
Should the hole rotate fast enough, event horizons would "merge" and disappear and you would be observing glowing singularity from the distance.
That would be naked singularity, the one which is not locked in the hole.
You would also observe the environment, where our laws of physics (including concept of causality) are no longer working.
Last edited by EnergyUnlimited on Wed 11 Apr 2007, 07:35:00, edited 1 time in total.
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Re: Massive Particle Accelerator Revving Up

Postby gg3 » Wed 11 Apr 2007, 07:31:48

Particle accelerators are not fusion systems and are not intended to produce any kind of usable energy output. All they are is great big science experiments for answering the most fundamental questions of our time.

Consider the amount of money and energy spent on entertainment. The cost of "big science experiments" is a small fraction of that. Anyone who's looking for something to rant at as an unnecessary use of money and energy is welcome to start by looking at the entertainment industries plural.

And for those who can't comprehend the idea that looking for answers to fundamental questions is an inherently valuable activity, just consider it a form of entertainment for geeks and nerds, and then compare to the money & energy spent on other forms of entertainment.

As for black holes, seems to me that the empirical evidence is starting to support the idea, and work built on the BH hypothesis seems to be fairly useful so far. Tomorrow we might discover that the universe is even weirder than that. Or not.
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Re: Massive Particle Accelerator Revving Up

Postby EnergyUnlimited » Wed 11 Apr 2007, 07:42:25

$this->bbcode_second_pass_quote('gg3', '
')As for black holes, seems to me that the empirical evidence is starting to support the idea, and work built on the BH hypothesis seems to be fairly useful so far. Tomorrow we might discover that the universe is even weirder than that. Or not.

Are you aware of any direct, empirical evidence of BH?
I am not.
Could you prove, that any BH candidate is not MECO?
I cannot.
However some direct observations are suggesting that MECO is there...if correct, it means that BH theories are only maths decoupled from physical reality.
You may wish to read that:
http://space.newscientist.com/article/d ... holes.html
Is there anything "useful" in existance of BH or MECO?
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Re: Massive Particle Accelerator Revving Up

Postby whereagles » Wed 11 Apr 2007, 08:51:43

SOOO.. Hawking says black holes evaporate.

What if he's wrong? :roll:
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Re: Massive Particle Accelerator Revving Up

Postby Rock_solid_bacon » Wed 11 Apr 2007, 22:30:14

Hawking is never wrong...
Oh wait. Hawking said we have to leave the earth for the stars, which is impossible...
I guess he is wrong again.
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Re: Massive Particle Accelerator Revving Up

Postby whereagles » Thu 12 Apr 2007, 06:07:43

The other day I saw a fictitional documentary on doomsday scenarios...

#1: a major undersea quake creates a 500m-high tsunami wave

#2: a virulent plague axes billions

#3: a huge meteorite of 30 km width crashes on land

and...

#4: a particle accelerator experiment creates a black hole which does NOT evaporate but sucks the whole Earth into it :roll:
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Re: Massive Particle Accelerator Revving Up

Postby jbeckton » Thu 12 Apr 2007, 11:04:35

$this->bbcode_second_pass_quote('ferrelgiraffe', 'D')on't worry, fusion is not possible sustainably. Like ethanol.


Tell that to that silly sun that keeps on ticking away......
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Re: Massive Particle Accelerator Revving Up

Postby whereagles » Thu 12 Apr 2007, 11:14:43

Yeah, the sun shines... but look, it needed 10^31 kg of hydrogen to get it started. Not easy to reproduce that back here on Earth :)

On a tech note, the sun runs on stellar pp and CNO fusion processes, which are not the type of fusion going on at ITER.
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Re: Massive Particle Accelerator Revving Up

Postby jbeckton » Thu 12 Apr 2007, 11:17:57

$this->bbcode_second_pass_quote('whereagles', 'Y')eah, the sun shines... but look, it needed 10^31 kg of hydrogen to get it started. Not easy to reproduce that back here on Earth :)

On a tech note, the sun runs on stellar pp and CNO fusion processes, which are not the type of fusion going on at ITER.


I'd just like people to stop saying its not possible. They can say its not feasible to replicate on earth all they want.
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Re: Massive Particle Accelerator Revving Up

Postby EnergyUnlimited » Thu 12 Apr 2007, 14:50:26

$this->bbcode_second_pass_quote('whereagles', 'Y')eah, the sun shines... but look, it needed 10^31 kg of hydrogen to get it started. Not easy to reproduce that back here on Earth :)

On a tech note, the sun runs on stellar pp and CNO fusion processes, which are not the type of fusion going on at ITER.

It would be quite a fun to observe giant interstellar cloud of deuterium gravitationally collapsing to form a star, which would only shine for several seconds or so.
Better watch it from a safe distance...
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Re: Massive Particle Accelerator Revving Up

Postby Tanada » Thu 12 Apr 2007, 15:21:40

$this->bbcode_second_pass_quote('EnergyUnlimited', '')$this->bbcode_second_pass_quote('whereagles', 'Y')eah, the sun shines... but look, it needed 10^31 kg of hydrogen to get it started. Not easy to reproduce that back here on Earth :)

On a tech note, the sun runs on stellar pp and CNO fusion processes, which are not the type of fusion going on at ITER.

It would be quite a fun to observe giant interstellar cloud of deuterium gravitationally collapsing to form a star, which would only shine for several seconds or so.
Better watch it from a safe distance...


That doesn't scan well. Deuterium stars would operate just like Protium stars do, heat and light from the core fusion reaction would suspend the vast majority of the mass in the zone where it would be too 'cold' to fuse. You wouldn't get a flash of the entire proto-star exploding if it were made of Deuterium, which is what it sounds like you were implying.
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Re: Massive Particle Accelerator Revving Up

Postby EnergyUnlimited » Thu 12 Apr 2007, 15:50:27

$this->bbcode_second_pass_quote('Tanada', '')$this->bbcode_second_pass_quote('EnergyUnlimited', '')$this->bbcode_second_pass_quote('whereagles', 'Y')eah, the sun shines... but look, it needed 10^31 kg of hydrogen to get it started. Not easy to reproduce that back here on Earth :)

On a tech note, the sun runs on stellar pp and CNO fusion processes, which are not the type of fusion going on at ITER.

It would be quite a fun to observe giant interstellar cloud of deuterium gravitationally collapsing to form a star, which would only shine for several seconds or so.
Better watch it from a safe distance...


That doesn't scan well. Deuterium stars would operate just like Protium stars do, heat and light from the core fusion reaction would suspend the vast majority of the mass in the zone where it would be too 'cold' to fuse. You wouldn't get a flash of the entire proto-star exploding if it were made of Deuterium, which is what it sounds like you were implying.

May be you are right, but I am not so certain.
IMO it is possible, that after initial ignition of deuterium in collapsing cloud radial pressure shock wave directed towards centre of star would compress deuterium so much, that it would fuse in H-Bomb style.
For this to be true, fusion would have to start at some distance (say 10 thousands of miles or so) from "geometrical centre" of star and in "spherical" fashion.
At first glance it looks unlikely, but process of gravitional collapse of cloud to form a star is very complex and not understood well and several models are suggesting that in newborn star fusion sets of just in such a manner. It would be only after some time, when fusion activity becomes greatest close to geometrical centre of star.
It is interesting subject anyway.
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Re: Massive Particle Accelerator Revving Up

Postby whereagles » Thu 12 Apr 2007, 20:33:49

$this->bbcode_second_pass_quote('jbeckton', 'I')'d just like people to stop saying its not possible. They can say its not feasible to replicate on earth all they want.

Hey, I never said it was not possible :P The pp/CNO-based fusion would probable be somewhat complicated, but there are other ways.
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Re: Massive Particle Accelerator Revving Up

Postby Newsseeker » Mon 16 Apr 2007, 10:36:04

$this->bbcode_second_pass_quote('whereagles', '')$this->bbcode_second_pass_quote('jbeckton', 'I')'d just like people to stop saying its not possible. They can say its not feasible to replicate on earth all they want.

Hey, I never said it was not possible :P The pp/CNO-based fusion would probable be somewhat complicated, but there are other ways.


What are the other ways?
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Re: Massive Particle Accelerator Revving Up

Postby whereagles » Mon 16 Apr 2007, 19:59:28

Well, for example the fusion process at hand in ITER: deuterium-tritium collision. This is similar to the hydrogen bomb mechanism.

The stellar pp-cycle is pretty nigh impossible to replicate in Earth due to its extremely low cross-section (1 fusion per each 10^9 collisions), which incidently is the reason the Sun burns slowly (it takes 10^9 years to burn out). The stellar CNO-cycle is a messy chain of reactions that goes faster than pp which seems quite complicated to replicate (at least to me).

You can check these at wikipedia.
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Re: Massive Particle Accelerator Revving Up

Postby Tanada » Mon 16 Apr 2007, 20:43:26

$this->bbcode_second_pass_quote('Newsseeker', '')$this->bbcode_second_pass_quote('whereagles', '')$this->bbcode_second_pass_quote('jbeckton', 'I')'d just like people to stop saying its not possible. They can say its not feasible to replicate on earth all they want.

Hey, I never said it was not possible :P The pp/CNO-based fusion would probable be somewhat complicated, but there are other ways.


What are the other ways?


One of the rarely discussed ways is
Li-7+H-1=Be-8=(2)He-4+energy

When the first hydrogen bombs with Lithium fuel were built it was a big surprise, the first device using solid fuel yeilded almost 3 times the predicted energy.
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Re: Massive Particle Accelerator Revving Up

Postby Rock_solid_bacon » Mon 16 Apr 2007, 22:44:17

Actually, the longhairs GUESSED that lithium 6 (rare) would make the reaction so they tried to separate lithium 7 and lithium six. the ruskies built a billion dollar plant top make lithium 6 isotope so they could make a fusion bomb.
Military longhairs ran out of 6 (hard to separate) so they said WHAT IF we just use hnatural lithium 7?

they did and it put out THREE times the energy as lithium 6.
Because lithium 7 breaks down into TWO tritium molecules! WOW.
now you have deuterium tritium fusion, and it put out 15 megatons instead of expected 4.8 megatons

it wiped the island off the map and exposed inhabited islands hundreds of miles away to deadly doses of readiatiinn and the army personel on the monitoring island were overcome by the mushroom cloud which was 100 miles wide, they hid in the basement until they could be rescued.

In other words COMMON LITHIUM 7 right out tof the ground is way more explosive than lithium 6 isotope which the Ruskies worked on for months to separate!

too interesting.
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Re: Massive Particle Accelerator Revving Up

Postby Rock_solid_bacon » Mon 16 Apr 2007, 22:57:36

Never trust a longhair, they really don't know what they are doing.
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