BenTheMan
12-30-07, 08:04 PM
The newest budgets in the US call for a substancial reduction in funding for high energy physics. Specifically, about 200 faculty/staff at Fermi National Accelerator Laboratory (http://www.fnal.gov/) may have to be cut, and the US funding for the Internaitonal Linear Collider (http://www.linearcollider.org/cms/) (ILC) R and D will be reduced by 75% or so. The US has also pulled out of the International Fusion experiment (ITER).
http://physicsworld.com/cws/article/news/32312
I don't think that this is a political decision, or if it is, it is the democrat controlled Legislature which has proposed this budget.
Further, the UK has pulled out of the ILC as well.
http://physicsworld.com/cws/article/news/32163
What is the ILC?
Well, first we have to figure out what it does. The Large Hadron Collider (http://lhc.web.cern.ch/lhc/) being built in Switzerland is a proton-proton collider. This means that they work by taking protons, accelerating them to near light speed in a huge ring, and crashing them into other protons that are speeding in the opposite direction.
This produces a collision with a HUGE amount of energy, which is great, because we can probe physics at these very high energies. The problem is, though, that the proton is more or less a bag of shit. There are three quarks which we all know live inside a proton, but there are also gluons (which are the force carriers of the strong force), and there are the so-called ``sea quarks''.
The sea-quarks are quark/anti-quark pairs which pop out of the vacuum (just like an electron/positron pair popping out of the vacuum). If these sea quarks pop out of the vacuum at just the right time (and they do), then they can participate in the collision with the other proton.
All of this means that it is hell to try and calculate things. You have to know the momenta of all of the quarks and gluons inside each of the protons, and this is a priori unknowable (quantum mechanics). The best analogy I can find is that you are taking two bags of jelly beans, and throwing them against each other, except you cannot know which fraction of the total momentum is carried by each of the jelly beans in each of the bags.
This is an absolute mess if you want to do precision experiments. In order to do precision experiments, you would like to have a very clean initial state. and it turns out that you can use a beam of electrons to do the same thing. You can know (relatively accurately) the momenta of the electrons. And because you know the momenta very accurately, this makes doing precision experiments very easy.
So the short story is: if you want to discover stuff, you need the LHC. But if you want to measure stuff, you need the ILC. The funding cuts by the US and UK make the ILC's future doubtful, which is very scary.
http://physicsworld.com/cws/article/news/32312
I don't think that this is a political decision, or if it is, it is the democrat controlled Legislature which has proposed this budget.
Further, the UK has pulled out of the ILC as well.
http://physicsworld.com/cws/article/news/32163
What is the ILC?
Well, first we have to figure out what it does. The Large Hadron Collider (http://lhc.web.cern.ch/lhc/) being built in Switzerland is a proton-proton collider. This means that they work by taking protons, accelerating them to near light speed in a huge ring, and crashing them into other protons that are speeding in the opposite direction.
This produces a collision with a HUGE amount of energy, which is great, because we can probe physics at these very high energies. The problem is, though, that the proton is more or less a bag of shit. There are three quarks which we all know live inside a proton, but there are also gluons (which are the force carriers of the strong force), and there are the so-called ``sea quarks''.
The sea-quarks are quark/anti-quark pairs which pop out of the vacuum (just like an electron/positron pair popping out of the vacuum). If these sea quarks pop out of the vacuum at just the right time (and they do), then they can participate in the collision with the other proton.
All of this means that it is hell to try and calculate things. You have to know the momenta of all of the quarks and gluons inside each of the protons, and this is a priori unknowable (quantum mechanics). The best analogy I can find is that you are taking two bags of jelly beans, and throwing them against each other, except you cannot know which fraction of the total momentum is carried by each of the jelly beans in each of the bags.
This is an absolute mess if you want to do precision experiments. In order to do precision experiments, you would like to have a very clean initial state. and it turns out that you can use a beam of electrons to do the same thing. You can know (relatively accurately) the momenta of the electrons. And because you know the momenta very accurately, this makes doing precision experiments very easy.
So the short story is: if you want to discover stuff, you need the LHC. But if you want to measure stuff, you need the ILC. The funding cuts by the US and UK make the ILC's future doubtful, which is very scary.