Skip to main content

Home/ Advanced Concepts Team/ Group items tagged fusion

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
jcunha

Explosion-Generated Collapsing Vacuum Bubbles Reach 20,000 Kelvin - 1 views

www.physicsforums.com/...uum-bubbles-reach-20000-kelvin

PHY sonoluminescence fun

shared by jcunha on 16 Sep 15 - No Cached
  • jcunha on 16 Sep 15
     
    "In a recent paper published in Physical Review Letters (PRL) Jérôme Duplat and Emmanuel Villermaux developed a method to generate centimeter-sized vacuum bubbles in water with miniature laser-driven explosions, and observed the flash of light produced as the bubble collapsed a not-fully-understood phenomenon known as sonoluminescence." Amazingly they concluded that the temperatrue inside the bubble as it collapses is about 26000 K. At this temperatures some (not me) argue for nuclear fusion... Intriguing stuff!!! Check the videos! Yet another test for the 'Experimental Physics Stagiare' :-)?
  • dejanpetkow on 16 Sep 15
     
    For sure no fusion, that starts appr. from about 20keV, not 20kK. Between both there is still a factor of 11500. What I would rather expect is that the conditions are not appropriate to work with Maxwellian distribution functions. If certain fusion products should be measurable, than this would rather confirm (but not proof) the hypothesis that they do not have Maxwellians but something close to monoenergetic. But most probably they will not measure fusion products, hence no fusion, hence no confusion.
santecarloni

Italian scientists claim to have demonstrated cold fusion (w/ Video) - 3 views

www.physorg.com/...entists-cold-fusion-video.html

cold fusion science

shared by santecarloni on 25 Jan 11 - No Cached
  • santecarloni on 25 Jan 11
     
    mah...
  • Luzi Bergamin on 25 Jan 11
     
    Perhaps they measured the "cold fusion" of Berlusconi with his girls. But that's not that cold, as it seems...
  • santecarloni on 25 Jan 11
     
    ...that is definitely HOT... ...on the other hand I don't think it would be fusion since it does not seems to produce any bound state... double mystery :)
H H

Lockheed Claims Breakthrough on Fusion Energy - 3 views

www.scientificamerican.com/...-breakthrough-on-fusion-energy

PHY fusion energy

shared by H H on 15 Oct 14 - No Cached
  • H H on 15 Oct 14
     
    Lockheed Martin Corp said on Wednesday it had made a technological breakthrough in developing a power source based on nuclear fusion, and the first reactors, small enough to fit on the back of a truck, could be ready in a decade.
  • Thijs Versloot on 17 Oct 14
     
    Is positive news definitely, but when it comes to fusion energy being skeptic is the wisest course of action. On the back of a truck basically means that the energy density of the device is such that the surface energy of a (steady state) plasma is beyond currents materials limits. It is probably a pulsed (ignitor-type) device, which are prone to instabilities. That could therefore refer to their breakthrough claim, of which they hardly say anything though. Lets see
  • jcunha on 17 Oct 14
     
    Since there were already a lot of false alarms on the field, one should definitively be careful about it. However not a single detail about its structure or how it works in this new... Here http://www.fusenet.eu/node/400 you can find a bit more of information about it.
Thijs Versloot

Laser #fusion passes milestone #NIF - 1 views

physicsworld.com/...laser-fusion-passes-milestone

fusion technology laser

shared by Thijs Versloot on 12 Feb 14 - No Cached
  • Thijs Versloot on 12 Feb 14
     
    Machine breakeven reached at NIF, meaning 10kJ pushed into the pellet and a total output of17kJ. This is however a machine breakeven as it took several orders of magnitude more power to pump and fire 192 ns-lasers to achieve the input, but a tremendous achievement nonetheless after 60 years of fusion research
  • Paul N on 14 Feb 14
     
    and I think the actual paper might be this one: http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13008.html
LeopoldS

Focus Fusion Society: Developing an environmentally safe, clean, low cost, unlimited e... - 0 views

focusfusion.org

nuclear NRG fusion fission plasma

shared by LeopoldS on 26 Oct 09 - Cached
  • LeopoldS on 26 Oct 09
     
    is this just another cold fusion crap or something we could have a closer look at .... still not clear to me ... anybody?
Thijs Versloot

Laser fusion reactor inches closer to ignition #NIF - 2 views

www.bbc.co.uk/...science-environment-24429621

energy fusion technology

shared by Thijs Versloot on 08 Oct 13 - No Cached
  • Thijs Versloot on 08 Oct 13
     
    a point called plasma/fuel break-even is reached where the energy released is higher than the power absorbed by the pellet. Of course, to produce 192 high power lasers does also have an efficiency. Thats why 'machine break-even' or even 'grid break-even' is more important and still quite a long way off. It does show that laser fusion is catching up quickly, although with serious bumps along the road.
Thijs Versloot

9-year timelapse of how to build a fusion reactor #Wendelstein7X - 5 views

www.youtube.com/watch

fusion technology stellerator

shared by Thijs Versloot on 16 Jun 14 - No Cached
  • Thijs Versloot on 16 Jun 14
     
    Looking forward to see what this amazing piece of engineering can do!
  • johannessimon81 on 17 Jun 14
     
    Whenever I see the complexity of fusion reactor design it makes me appreciate the simplicity of fission reactors even more. ;-D
  • Ma Ru on 20 Jun 14
     
    Hope no one left their sandwich inside this time...
marliesarnhof

MIT and newly formed company launch novel approach to fusion power | MIT News - 1 views

news.mit.edu/...vel-approach-fusion-power-0309

PHY technology science

shared by marliesarnhof on 09 Mar 18 - No Cached
  • marliesarnhof on 09 Mar 18
     
    Scientists anticipate the output would be more than twice the power used to heat the plasma, achieving the ultimate technical milestone: positive net energy from fusion.
Chritos Vezyri

NASA's basement nuclear reactor - 2 views

www.gizmag.com/...26309

nuclear fusion metal hydride Hydrogen energy

shared by Chritos Vezyri on 06 Mar 13 - No Cached
  • johannessimon81 on 06 Mar 13
     
    So they think they found a way for beta decay to produce both lighter (Ni->Cu) AND heavier (C->N) nuclei? ...
  • LeopoldS on 10 Mar 13
     
    just another attempt to revive cold fusion from the dead ... and all with dubious experimental setups; read the last phrase ""From my perspective, this is still a physics experiment," Zawodny said. "I'm interested in understanding whether the phenomenon is real, what it's all about. Then the next step is to develop the rules for engineering. Once you have that, I'm going to let the engineers have all the fun." He went on to say that, " All we really need is that one bit of irrefutable, reproducible proof that we have a system that works. As soon as you have that, everybody is going to throw their assets at it. And then I want to buy one of these things and put it in my house."
johannessimon81

ESA article on magnetic reconnection, related: solar flares, earth magnetic field jets,... - 0 views

sci.esa.int/...index.cfm

PHY science space ESA CLUSTER

shared by johannessimon81 on 22 May 13 - No Cached
  • johannessimon81 on 22 May 13
     
    ESA Science & Technology: A leap forward in probing magnetic reconnection in space: Magnetic reconnection is a fundamental physical process in the Universe, playing a major role in various phenomena such as star formation or solar explosions, but also preventing plasma confinement in fusion reactors on Earth. However, a lack of precise measurements at the heart of this physical process prevents a full understanding of this phenomenon.
LeopoldS

[1305.3913] Indication of anomalous heat energy production in a reactor device - 5 views

arxiv.org/1305.3913

shared by LeopoldS on 23 May 13 - No Cached
  • LeopoldS on 23 May 13
     
    looks like some backwind for all the cold fusion believers ...
  • ...1 more comment...
  • johannessimon81 on 24 May 13
     
    Actually Sante and me just reviewed their paper. Although (some of) the scientists in the paper seem to have good track records their experimental techniques are by far not the best to determine the excess amount of energy produced. Even though their methods may introduce fairly large errors they would not be able to negate the cited power output - so they either are super-sloppy (i.e. they lie) or there is TRULY new physics involved... A big problem is that they are basically verifying somebody else's experiment - however because this guy is paranoid he does not tell them exactly what he did. In fact they went to his lab and used a setup that HE put together. All they do is do a measurement on it and it seems like they try to be thorough. There is quite a chance that the guy behind it all (Rossi) is setting them up - personally I would think >95%. However, the implications of this being new physics are so big that I think further research should be conducted.
  • LeopoldS on 24 May 13
     
    I just answered something very similar to Franco, except the conclusions: I don't think that there is a good reason for us or anybody else in ESA to get involved at this stage.
  • johannessimon81 on 24 May 13
     
    I agree - if this device would work it there would be other interest groups (like the energy sector) with a much more concrete stake in the technology.
Marcus Maertens

Supernova Core Imaged For the First Time - 0 views

www.iflscience.com/...pernova-core-imaged-first-time

space PHY

shared by Marcus Maertens on 22 Feb 14 - No Cached
  • Marcus Maertens on 22 Feb 14
     
    towards a better understanding about the fusion processes in the last moments of a star's life.
Thijs Versloot

Word of the day - thermoelectric magnetohydrodynamic flow - 1 views

physics.aps.org/st8

fusion MHD

shared by Thijs Versloot on 10 Dec 13 - No Cached
  • Thijs Versloot on 10 Dec 13
     
    Heat and a magnetic field cause the liquid lithium to swirl rapidly, an effect that could be useful in fusion reactors. With a nice video http://physics.aps.org/assets/eab7d11d-20cd-4c37-ab2c-313729ad8422/video-v1.mp4
Zivile Dalikaite

Amaze project aims to take 3D printing 'into metal age' - 1 views

www.bbc.co.uk/...science-environment-24528306

technology

shared by Zivile Dalikaite on 16 Oct 13 - No Cached
  • Zivile Dalikaite on 16 Oct 13
     
    The European Space Agency has unveiled plans to "take 3D printing into the metal age" by building parts for jets, spacecraft and fusion projects.
  • Marcus Maertens on 16 Oct 13
     
    Metal Age sounds like some epic good time...
pacome delva

Planetary physics shrunk into a lab as MIT pursues fusion - 1 views

physicsworld.com/...41540

phy fusion

shared by pacome delva on 15 Feb 10 - Cached
  • pacome delva on 15 Feb 10
     
    Cool video...
ESA ACT

A new age for science? - 0 views

www.nature.com/...0CD0ADD83A7B81878C50B8C035966D

PHY forecast

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    What would you do if you owned the world's most powerful laser? The US government is hoping to use it to achieve the ignition of thermonuclear fusion in the lab for the first time. Nature Photonics spoke to Edward Moses of the National Ignition Facility t
ESA ACT

Theo Jansen - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Theo_Jansen

BIO Engineering Art Creativity

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    Theo Jansen is an artist and kinetic sculptor living and working in Holland. He builds large works which resemble skeletons of animals which are able to walk using the wind on the beaches of the Netherlands. His animated works are a fusion of art and engi
Joris _

A Fusion Thruster for Space Travel - IEEE Spectrum - 4 views

spectrum.ieee.org/...0

Thruster PHY NRG NASA

shared by Joris _ on 29 Jun 11 - No Cached
LeopoldS liked it
  • Now a NASA engineer has come up with a new way to fling satellites through space on mere grams of fuel, tens of times as efficiently as today’s best space probe thrusters.
  • Instead of using deuterium and tritium as the fuel stocks, the new motor extracts energy from boron fuel.
  • Joris _ on 29 Jun 11
     
    "And according to his calculations, improvements in short-pulse laser systems could make this form of thruster more than 40 times as efficient as even the best of today's ionic propulsion systems that push spacecraft around. "
  • LeopoldS on 02 Jul 11
     
    Dejan please have a look at this also ...
  • LeopoldS on 02 Jul 11
     
    while the nuclear reaction seems to be sound at first view, I am not so sure how this would work: "Electromagnetic forces push the target and the alpha particles in the opposite directions, and the particles exit the spacecraft through a nozzle, providing the vehicle's thrust. "
1 - 20 of 31 Next ›
Showing 20▼ items per page