World's largest laser

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Daedalus685

Golden Member
Nov 12, 2009
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I thought we were already able to create controlled fusion reactions, such as the tokamak, and this was an attempt to create a net positive reaction. I though I had heard of this earlier, and that the big deal about this method was they thought they could get more energy released than they used to generate the reaction.

You are correct, the point is to control a net positive fusion reaction, not fusion in general. Though this is in no way an attempt to harness the energy. The conditions hey will create (if it works) will be unlike anything every done on earth before.


It is certainly not the first step towards the final goal, but it is closer to the first than the last is all I'm saying.


As for using the sun we already have... there is only limited information one can gather from it, as we can't exactly probe to its core.
 

Daedalus685

Golden Member
Nov 12, 2009
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This.

Don't see how this will lead to any practical fusion power generator.

Look up Inertial Electrostatic Confinement. May suprise the whole magnetic confinement community. Doesn't require giga bucks and would start eliminating our dependence on oil too soon so it won't happen.

IECs are very promising.. but they can't reach the same kind of temperatures or energy possible in the laser fusion environment. I don't know why the entire thing is being rated on its economical viability as a final product when we are still years away from the knowledge bing such that we could even design a product.

Besides that, the ignition facility is more concerned with the catalyst of a high energy reaction, not its confinement. Many ideas would use magnetic confinement even with something like this.

If the point is to reduce dependence on oil solar energy dispersed from home to home would provide nearly all the power we require... We could switch today given the desire and funds. Fusion would only be used to offset a decentralized grid for high demand (cloudy) days. This provides much more insight than use as power. If the trouble folks have with this is the possibility of it being used to create a new monopoly on power then I agree that it could be bad, but that does not diminish the value of the research.
 
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daishi5

Golden Member
Feb 17, 2005
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You are correct, the point is to control a net positive fusion reaction, not fusion in general. Though this is in no way an attempt to harness the energy. The conditions hey will create (if it works) will be unlike anything every done on earth before.


It is certainly not the first step towards the final goal, but it is closer to the first than the last is all I'm saying.


As for using the sun we already have... there is only limited information one can gather from it, as we can't exactly probe to its core.

Good, I hate finding out I am wrong. I guess it seems like a huge milestone to me, crossing the border from loss to gain, although it does not sound like this process (giant laser at a small gold bead) can be a continuous source of power.
 

Daedalus685

Golden Member
Nov 12, 2009
1,386
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Good, I hate finding out I am wrong. I guess it seems like a huge milestone to me, crossing the border from loss to gain, although it does not sound like this process (giant laser at a small gold bead) can be a continuous source of power.

Not on its own, but a lot of the research they are looking at is using the neutrons from this sort of thing to propel a fission reaction. This would be able to use almost anything as fuel (left overs from a reactor, fresh out of the ground thorium, etc.)

Starting a fusion reaction is by no means easy, if one can catalyse one as "simply" as blasting it with a laser every now and then things can start to move forward. This particular experiment will not create a sustained reaction, it will exist for only a fraction of a second longer than the laser is running (and that will be on the order of a billionth of a second)
 

K1052

Elite Member
Aug 21, 2003
53,892
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Oh no doubt it is expensive... it is still useful, and the work has a lot of importance. It is a one of a kind facility, the US doesn't need a more powerful collider at the moment.

I love buzz words though, I'd like to slap the dudes at Fermilab who name things... What exactly makes the already super conduction collider there not a superconducting super collider? lol

Does the mere existence of the LHC rob it of its "super"?

Actually the Europeans are in the planning stages for their own ICF facility that will reach signifigantly higher energies than the NIF.

I believe the term "super collider" was used in reference to the fact that the SSC would be capable of collisions at something like 40 times the power of the Tevatron.
 

piasabird

Lifer
Feb 6, 2002
17,168
60
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Maybe California will blow up or be incinerated.

Arent you at least a little worried if you live close to this thing?
 

Daedalus685

Golden Member
Nov 12, 2009
1,386
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Actually the Europeans are in the planning stages for their own ICF facility that will reach signifigantly higher energies than the NIF.

I believe the term "super collider" was used in reference to the fact that the SSC would be capable of collisions at something like 40 times the power of the Tevatron.

Aye, I just find the term "super" rather humorous in this situation.. sooner or later we will have to make up new words to describe our awesomeness.

As with all things the "biggest" and "one of a kind" never remains as such for long. No one would ever do anything if being eventually out done ever came under consideration. The ICF will be eclipsed, then that new one will be eclipsed, and so on. Particle accelerators are a great example of this; they do what they intend to, give us a bunch of info, then everyone moves on to the bigger one.
 

McWatt

Senior member
Feb 25, 2010
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I thought the bad CNN article, despite all the cringe-worthy mistakes and misconceptions, would be the high point of this thread. I expected only trolls in response.

Daedalus, you surprised me. You handled the trolling with grace, gave vague comments the benefit of the doubt and responded to a more insightful version of them, and generally stated your points very well. I'm delighted to see someone in here make the point that commercialization isn't the point of every scientific experiment. The NIF will teach us things that will lead to thousands of discoveries over the next fifty years, and those are things we wouldn't have learned with solar observatories and tokamaks. As far as I'm concerned, scientific discovery is the most worthy pursuit on the planet.
 

Moonbeam

Elite Member
Nov 24, 1999
74,984
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OK OK, so you don't want to tell me you're young. Fine, then I should probably just deal with what you say since calling you a stupid fuck didn't jar your thinking to a more rational level.

D: They are researching fusion.. they are not creating bombs...

M: You're kidding me, right. Like I said they are creating bombs. I said they are providing charity for the nuclear folk to keep nuclear alive, that means energy and weapons, the scientific expertise needed for both, the pipeline of future nuclear scientists in colleges, etc. It's a nuclear dole.

D: They are not trying to replace solar power.

M: I didn't say they were. What they are doing is sucking up funds for solar and scientific talent better used there.

D: The science would be entirely worth while merely from an astrophysical point of view, the possibility of cleaner centralized power (which should only be used to augment a decentralized system, ideally) is just frosting.

M: Medical research to end something like malaria would be a better frosting. We have limited funds and fusion research is a man child engineering toy.

D: A bomb is an uncontrolled fusion reaction... sure with better understanding they could theoretically make a smaller H-bomb... but that is true of most any science.

M: Yup, Malaria research might lead to a malaria bomb too.

D: The point is to keep it uncontrolled, that is easy.. Controlling the reaction provides very little in the way of making a better way to blow yourselves up other than to make the weapon easier to truck around.

M: Right, about back pack size will do. Al Quaeda is looking for several dozen and will pay handsomely.

D: If you believe that nuclear physics has no place in society you are either profoundly ignorant or profoundly paranoid.

M: No, I already said you are young and ignorant. I was first so we will stay with that. What the young and stupid call profoundly ignorant and profoundly paranoid is simply how wisdom looks to a fool.

D: I assume your roof comment was about the power generation.. as I have said that is only a mere fraction of what this brings..

Brings? 50 years and we are maybe maybe going to see a billionth of a second first return. Moving right along, aren't we. I would bet a circa 60's solar cell in a calculator has returned more energy than we've seen from fusion, eh, net plus?

D: I'm not sure I understand your point though... Unless you are just trying to troll (mission accomplished if so)

M: Hehe, the next time I don't understand somebody I am going to stick them in a fire for an hour or two and then say WAT? Dollars to tokamaks you're young.
 

Moonbeam

Elite Member
Nov 24, 1999
74,984
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Maybe California will blow up or be incinerated.

Arent you at least a little worried if you live close to this thing?

Not at all. I am close enough that I won't feel a thing. Nerve impulses won't move even a fraction of an inch.
 

Daedalus685

Golden Member
Nov 12, 2009
1,386
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OK OK, so you don't want to tell me you're young. Fine, then I should probably just deal with what you say since calling you a stupid fuck didn't jar your thinking to a more rational level.

D: They are researching fusion.. they are not creating bombs...

M: You're kidding me, right. Like I said they are creating bombs. I said they are providing charity for the nuclear folk to keep nuclear alive, that means energy and weapons, the scientific expertise needed for both, the pipeline of future nuclear scientists in colleges, etc. It's a nuclear dole.

D: They are not trying to replace solar power.

M: I didn't say they were. What they are doing is sucking up funds for solar and scientific talent better used there.

D: The science would be entirely worth while merely from an astrophysical point of view, the possibility of cleaner centralized power (which should only be used to augment a decentralized system, ideally) is just frosting.

M: Medical research to end something like malaria would be a better frosting. We have limited funds and fusion research is a man child engineering toy.

D: A bomb is an uncontrolled fusion reaction... sure with better understanding they could theoretically make a smaller H-bomb... but that is true of most any science.

M: Yup, Malaria research might lead to a malaria bomb too.

D: The point is to keep it uncontrolled, that is easy.. Controlling the reaction provides very little in the way of making a better way to blow yourselves up other than to make the weapon easier to truck around.

M: Right, about back pack size will do. Al Quaeda is looking for several dozen and will pay handsomely.

D: If you believe that nuclear physics has no place in society you are either profoundly ignorant or profoundly paranoid.

M: No, I already said you are young and ignorant. I was first so we will stay with that. What the young and stupid call profoundly ignorant and profoundly paranoid is simply how wisdom looks to a fool.

D: I assume your roof comment was about the power generation.. as I have said that is only a mere fraction of what this brings..

Brings? 50 years and we are maybe maybe going to see a billionth of a second first return. Moving right along, aren't we. I would bet a circa 60's solar cell in a calculator has returned more energy than we've seen from fusion, eh, net plus?

D: I'm not sure I understand your point though... Unless you are just trying to troll (mission accomplished if so)

M: Hehe, the next time I don't understand somebody I am going to stick them in a fire for an hour or two and then say WAT? Dollars to tokamaks you're young.

I have a degree in physics if that is what you are asking...

There are much more 'honourable' points of interest in the medical fields... but the same arguments you use to poo poo this could be applied to every aspect of physics.. You may not enjoy the science, but that i no way means it is less important than any other area of study.

The sun is the single most important thing to our existence.. understanding more fully how it works is quite valid.

Solar cells are already quite advanced.. money need not be spent to improve them in order to make them viable. We could convert every home to using them now and produce almost all of the power we need (excluding down town city cores). Spending money on fusion is NOT preventing this from happening. The lack of political balls is.

Is your point that you don't like the science or that you don't like that some folks who may have at one time worked on a bomb are doing it?

We will need centralized power for as long as we live in an urban setting. We need to vastly increase our decentralized power, but we also need to figure out a way to safely augment it. What do you propose? It would be entirely valid to propose the end to cities... which is how my wife feels.. but that is not nearly a good enough reason for myself to not wish to know more about things like particle and nuclear physics.

I feel your issue is that we need centralized power in the first place, which is fine, but not really what we are talking about.

Would you feel better if this never mentioned fusion and just called it "researching how the sun works" or is your only problem the cost and scientist investment? You realize those scientists could work on something else if they wanted to right? They tend to work best doing what they like best, sorry if that is not what you like best.

As for the cost.. yes it is expensive, as learning often is. Frankly though, while there may be more quickly useful science to spend money on we are spendign a LOT more on FAR more useless things (like war).

If the time until useful products is the issue, I don't know what to say other than that is ridiculous. Until we started the GPS (the system must be adjusted for gravitational time dilation constantly, to the best of my knowledge this is the only commercial system that makes use of the concept in the slightest, and would truly be impossible without it) relativity provided us with no useful products, almost a century for that to happen.. Were the scientists that proved Einstein correct wasting their time in the 30s? If yes, then your problem must simply be with humanity and not 'fusion'.

Please feel free to explain your actual stance... but "I don't agree therefore you are an idiot" doesn't hold much water where I come from.

Moreover, I don't quite follow if your problem with this is political (it cost too much, was payed for by the department of energy, etc.) or scientific (the experiments have no merit). If political, that is your opinion and all I can say is that I believe the costs is acceptable given the money spent on things like war. Though certainly it is a LOT of money and perhaps should be privately funded. If your issue is scientific, you are simply plain wrong. The science certainly has merit (in many disciplines, even solely in the field of laser optics) even if your political objection out weighs this (which is fair enough).
 
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daishi5

Golden Member
Feb 17, 2005
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I don't think most people realize that fusion reactions have to be maintained, and cannot run out of control and go boom like a fission reaction can.
 

K1052

Elite Member
Aug 21, 2003
53,892
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It would be entirely valid to propose the end to cities... which is how my wife feels..

:eek:

Urban density has a far more pluses than can be outweighed by the negative of centralized electricity generation.
 

Daedalus685

Golden Member
Nov 12, 2009
1,386
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:eek:

Urban density has a far more pluses than can be outweighed by the negative of centralized electricity generation.

I didn't say I agree with her... only that I can understand some think that way and it is valid (remember, to be valid only really requires most of ones points not to be BS). Mind you her belief is not only based on centralization of energy but also mainly separation from 'nature' (food and so on)... not going there. Oddly enough she is the one who grew up in a city and I am the one currently working in the middle of nowhere... lol

But centralization of energy is going to be a big problem eventually, given how surface area dependant our other methods are.
 
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hal2kilo

Lifer
Feb 24, 2009
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I don't think most people realize that fusion reactions have to be maintained, and cannot run out of control and go boom like a fission reaction can.

It's a struggle to maintain a stable fusion for more the a second or so with any of the technologies.

The facility was designed to mimic the high flux neutron emissions of nuclear weapons. You're lucky if they schedule a shot a week. They no dought will be able to make a momentary over unity fusion burst but I have a feeling that the laser array is rediculously inefficient. This will not be the candidate for future fusion power generation.

I don't have a problem with the basic research they are conducting just that someones trying to drum up some extra budget.
 
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Daedalus685

Golden Member
Nov 12, 2009
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It's a struggle to maintain a stable fusion for more the a second or so with any of the technologies.

The facility was designed to mimic the high flux netron emissions of nuclear weapons. You're lucky if they schedule a shot a week. They no dought will be able to make a momentary over unity fusion burst but I have a feeling that the laser array is rediculously inefficient. This will not be the candidate for future fusion power generation.

I don't have a problem with the basic research they are conducting just that someones trying to drum up some extra budget.

I have no doubt they would not have gotten all the budget they did if they could not have some sort of application to defence.. as seems to be the way of things. As I understand it they are interested in using part of the facility to model the behaviour of an aged bomb. Though there is talk about a 'pure fusion' bomb (not for a long time).

But that is politics... I dislike the politics of science, and try hard to change them.. but they are what they are. Good work will still likely come out of there as it relates to many fields. I am particularly impressed with the talk about the LIFE reactor (hybrid fusion/fission) which looks quite neat.

Sure, I'd prefer if it was an entirely 'pure' facility with no ties to anything 'immoral'. But my interest in the science is not affected by my loathing of those paying for it.
 

Daedalus685

Golden Member
Nov 12, 2009
1,386
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I should point out.. there are some slimy, dirty, and dark politics at work at the NIF... But what I see is a very cool experiemnt that will give answers to many things. We simply should not avoid it because it could be used for ill but press those that control its use to ensure it never is.
 

dennilfloss

Past Lifer 1957-2014 In Memoriam
Oct 21, 1999
30,509
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dennilfloss.blogspot.com
The first trials at the National Ignition Facility had mixed results.

fart-fire.jpg
 

KDOG

Diamond Member
Oct 9, 1999
5,525
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Wait did they say it will be ready in two years? As in 2012? Oh boy...
 

CanOWorms

Lifer
Jul 3, 2001
12,404
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/facepalm

That is the stupidest thing I've ever heard... I mean what possible benefit to human kind could understanding how the sun works bring.... This could not have less to do with weapons technology...

It has a lot to do with weapons technology. One of the purposes is to maintain the nuclear weapons stockpile.
 

Daedalus685

Golden Member
Nov 12, 2009
1,386
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It has a lot to do with weapons technology. One of the purposes is to maintain the nuclear weapons stockpile.

It has the option to experiment on the sustainability of stockpiles.. So I was certainly not exact in my claim... They want to be able to rate how well the weapons will age. My outrage is that folks seem to be ok with forgoing massive swaths of knowledge based on how it could be used for ill.. this is a concern for every aspect of science and can't be ignored.. but is no reason to avoid something.

But generally moon seemed to be spouting that ALL fusion has to do with weapons technology and that this was to develop new tech. Which is not true, and a stigma towards it is not warranted outright.
 

DrPizza

Administrator Elite Member Goat Whisperer
Mar 5, 2001
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I should necro the thread from 1897:
All this research about atoms and electrons is dumb. They say that it has the potential to provide electricity or something to homes in about 40 years, if they're lucky, so that we can have lights. We already have lanterns that work just fine. They should research how to cure toothaches or something more useful.