Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Laser Fusion Test Successful
Early tests from the National Ignition Facility showed that a stable plasma could be created when focusing 192 separate lasers - an important step in controlled thermonuclear fusion.
( The experiment focuses 192 high-power laser beams )
In the approach Nif takes, called inertial confinement fusion, the target is a centimetre-scale cylinder of gold called a hohlraum.
It contains a tiny pellet of fuel made from an isotope of hydrogen called deuterium.
The fear has been that the plasma, a roiling soup of charged particles, would interrupt the target's ability to absorb the lasers' energy and funnel it uniformly into the fuel, compressing it and causing ignition.
Siegfried Glenzer, the Nif plasma scientist, led a team to test that theory, smashing records along the way.
"We hit it with 669 kilojoules - 20 times more than any previous laser facility," Nif's Siegfried Glenzer told BBC News.
That isn't that much total energy; it's about enough to boil a one-litre kettle twice over.
However, the beams delivered their energy in pulses lasting a little more than 10 billionths of a second.
Crucially, the recent experiments provided proof that the plasma did not reduce the hohlraum's ability to absorb the incident laser light; it absorbed about 95%.
But more than that, Dr Glenzer's team discovered that the plasma can actually be carefully manipulated to increase the uniformity of the compression.
The 130-tonne target chamber is kept under vacuum for the experiments "For the first time ever in the 50-year journey of laser fusion, these laser-plasma interactions have been shown to be less of a problem than predicted, not more," said Mike Dunne, director of the UK's Central Laser Facility and leader of the European laser fusion effort known as HiPER.
Science fiction writers have promoted the idea. Here's a quote from Picoverse, Robert A. Metzger's 2003 novel:
"The output of each Pocket Accelerator is focused at the center of the Sonomak, in which the intersection cavication beams create a spherical region nearly devoid of electrons - you can picture it as a bubble in a sea of electrons. By careful manipulation of the laser pulse duration and frequency, this bubble can be made to pulse... during which the energy of the laser is coupled to the ions within the bubble, feeding them, causing them to rapidly heat."
Via BBC; thanks to Rolf Redford for the tip and the reference for this story.
Scroll down for more stories in the same category. (Story submitted 2/13/2010)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 1 )
Related News Stories - (" Engineering ")
X-Control Janus-1 A Suitcase Aircraft
'You will notice that it... fits the suitcase nicely.' - E.D. Skinner, 1929.
Time Crystals Can Now Be Seen Directly
'It is as you thought when you constructed the time crystal, my master Vaylan.' - NK Heming, 1952.
China Steals Strato Airship Design From Google App Engine
'...war-balloons, or, as it would be more correct to call them, navigable aerostats.' - George Griffith, 1893.
Biohybrid Jellyfish Explore The Ocean
As predicted, and detailed, by science fiction writers!
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Musk Idea Of Cars Talking To Each Other Predicted 70 Years Ago
'My cars talk to one another.'
Elegant Bivouac Shelter Produces Water And Electricity
'There was nowhere on the planet where science and technology could not provide one with a comfortable home...'
X-Control Janus-1 A Suitcase Aircraft
'You will notice that it... fits the suitcase nicely.'
'AI Assistants' Are Actually Less Reliable For News
'Most men updated their PIP on New Year's Day...'
YES!! Remote Teleoperated Robots predicted by Technovelgy!
'...a misshapen, many-tentacled thing about twice the size of a man.'
Will Robots Ever Fold Landry?
Where have you gone, Mrs. Robinson?
Will AIs Give Better Results If You're Rude To Them?
'I said, "Listen up, motherf*cker.'
Cybertruck Robotic Arm F10 Drone Launch!
Drone away!
Black Fungus Blocks Radiation
'You were surrounded by Astrophage most of the time'
Liuzhi Process Now In Use In China
'He was in a high-ceilinged windowless cell with walls of glittering white porcelain.'
Reflect Orbital Offers 'Sunlight on Demand' And Light Pollution
'I don't have to tell you about the seven two-mile-diameter orbital mirrors...'
Will Robots Become Family Caregivers?
'The robant and the tiny old woman entered the control room slowly...'
Chinese Tokamak Uses AI To Keep Fusion Plasma Stable
'Guy named Otto Octavius winds up with eight limbs... What are the odds?'
Time Crystals Can Now Be Seen Directly
'It is as you thought when you constructed the time crystal, my master Vaylan.'
RoboBallet The Dance Of Cooperative Robots
'...an integrated seven-unit robot team.'
Chrysalis Generation Ship to Alpha Centauri
'This was their world, their planet —
this swift-traveling, yet seemingly moveless vessel.'
