The next big experiment
An update on CERN's Hadron Collider: Remember the great Large Hadron Collider (LHC) experiment? It was supposed to develop our understanding about what happened a mere trillionth of a second after the Big Bang, as well as running experiments searching for Higgs-Boson particle - the mysterious and as yet undetected particle that provides the universe with mass (is it wrong to blame the Higg's Bosons for my weight gain?) . Alas, shortly after the LHC was up running, gremlins broke in and toyed with the machinery and the whole thing went off-line for repairs. With the collider not expected to come back to life in September, the white coats at the Fermilab are getting ever closer to the elusive Higgs-Boson.
The next big experiment - the US National Ignition Facility (NIF): I find this even more fascinating than the LHC because of it's practical potential. The NIF project - which has just completed construction - is a fusion project that aims to create make a star in its lab. Yes, you read that correctly: to make a star.
By replicating the conditions and processes that power the sun and the birth of the stars, scientists hope to prove that it is possible to create a process that generates a surplus of energy output relative to the energy input required to get it going in the first place. If it works it will green-light development in the fusion field, providing us with confidence that it is indeed possible to create a process that produces a net energy surplus. If it fails, it will be a major road block in the world of fusion.
This could be the holy grail of energy, not only because of its miraculous 'something from nothing' nature, but because energy from fusion would infinite and super green - theoretically the process can produce the energy equivalent of two tonnes of coal from a mere fifty cups of water, and all with no dangerous waste, pollutants or any such toxic material.
Experiments at the NIF get going in a few months, but we'll have to wait until next year when they start producing significant results. We wait with baited breath.
Here is NIF's recipe for making a star:
Recipe for a Small Star
* Take a hollow, spherical plastic capsule about two millimeters in diameter (about the size of a small pea).
* Fill it with 150 micrograms (less than one-millionth of a pound) of a mixture of deuterium and tritium, the two heavy isotopes of hydrogen.
* Take a laser that for about 20 billionths of a second can generate 500 trillion watts – the equivalent of five million million 100-watt light bulbs.
* Focus all that laser power onto the surface of the capsule.
* Wait ten billionths of a second.
* Result: one miniature star.
In this process the capsule and its deuterium-tritium (D-T) fuel will be compressed to a density 100 times that of solid lead, and heated to more than 100 million degrees Celsius – hotter than the center of the sun. These conditions are just those required to initiate thermonuclear fusion, the energy source of stars.
By following our recipe, we would make a miniature star that lasts for a tiny fraction of a second. During its brief lifetime, it will produce energy the way the stars and the sun do, by nuclear fusion. Our little star will produce ten to 100 times more energy than we used to ignite it.
Here's how it looks on the ground:
The main lab is the size of three American Football pitches.
One of two laser bays. 192 laser beams are fired around the bays, passing through multiple amplifiers until they are ready to strike the target. In a final stage of the process the laser beams are converted from infra-red to ultra-violet.
The target chamber, where the reaction takes place.
Inside the reaction chamber, all the laser beams will be channelled on to a tiny target (it's on the end of the point, in the picture).
The target chamber, which contains the pea sized fuel capsule.
Computer image of laser beams striking target chamber.
A star is born.









































