TrooperBari
Well-Known Member
From the "science that's too damn cool to ignore" file:
http://www.guardian.co.uk/science/cern
The Large Hadron Collider -- dubbed science's most ambitious, and expensive, experiment -- starts its work soon after 20 years of preparation. It's going to accelerate particles to 99.99% of the speed of light and crash them together, all in an attempt to recreate conditions not seen in the universe since the Big Bang.
Some facts and figures on the project that cost $10 billion to create:
Why drop all that cash on a subatomic speedway, you ask?
http://www.guardian.co.uk/science/2008/jun/30/cern.particle.physics1
And in case you're worried about strangelets or mini-black holes:
http://www.guardian.co.uk/science/2008/jun/30/cern.particlephysics1
http://www.guardian.co.uk/science/cern
The Large Hadron Collider -- dubbed science's most ambitious, and expensive, experiment -- starts its work soon after 20 years of preparation. It's going to accelerate particles to 99.99% of the speed of light and crash them together, all in an attempt to recreate conditions not seen in the universe since the Big Bang.
Some facts and figures on the project that cost $10 billion to create:
· The Large Hadron Collider at Cern has been installed in a tunnel 27km in circumference, buried 100m underground.
· It will produce head-on collisions between two beams of particles travelling through a vacuum comparable to outer space.
· Each beam will consist of almost 3000 bunches of 100 billion particles each.
· At full power, each beam will be about as energetic as a car moving at 1600 kph.
· At near light speed, a proton in the LHC beam will make 11,245 laps a second.
· A beam might circulate for 10 hours, travelling more than 10 billion kilometres - far enough to get to the planet Neptune and back.
· 3000km of wires and fibres will carry information at the rate of 3200 terabytes per year, equivalent to around 3 billion books.
Why drop all that cash on a subatomic speedway, you ask?
http://www.guardian.co.uk/science/2008/jun/30/cern.particle.physics1
But what is it for? The stock answer is that after years of effort from thousands of scientists, from dozens of countries and a cost of almost $10bn, we are finally about to find out whether an elementary particle called the Higgs boson exists or not. Unless you are one of those thousands of scientists who have worked towards this moment, you might wonder if any subatomic particle, however exotic-sounding, is worth so much money.
But look more carefully at exactly what all this fuss is about. The two great pillars of 20th century physics are quantum mechanics (the theory describing the tiny world of atoms and below) and Einstein's theory of relativity (describing the cosmic world of stars, galaxies and even the whole universe). Between them, they account for the four fundamental physical forces of nature, but the problem is they don't agree with each other and it has troubled physicists for decades. Einstein himself spent the last part of his life trying to find a way around the problem but ultimately failed.
Relativity theory describes gravity, while the other three fundamental forces (electromagnetic, strong and weak nuclear forces) are explained by quantum mechanics or, to give it its current name, the Standard Model of particle physics. This is the culmination of 20th century effort to understand and catalogue what makes up matter. It describes not only how atoms behave but zooms down deeper to the elementary particles, of which the electron is just one.
It does not answer everything, however. Why, for example, are some particles light while others are heavy? Why do we see small differences between the properties of matter and antimatter? How are the three subatomic forces related and can they be unified in a single theory?
Some of these questions will be answered if the LHC finds evidence for a particle proposed in the 1960s by a modest physicist called Peter Higgs (see p.13). The Higgs boson is the missing ingredient in the Standard Model, the so-called "God particle" that explains the origin of mass. The more something interacts with a Higgs boson, the more massive it is. Finding the particle would help confirm the Standard Model as the correct picture of the subatomic world.
And in case you're worried about strangelets or mini-black holes:
http://www.guardian.co.uk/science/2008/jun/30/cern.particlephysics1