峰 的个人资料Lifeng's physics_world照片日志列表更多  |  工具 帮助 |
|
8月23日 CERN关于LHC十分钟科普片的字幕 2008-09-15 这是一部相当不错的短片，对LHC及其在上面将要进行的工作都做了很详细，形象的介绍。 图片很漂亮，主讲人的声音也相当好听。邻近结尾处Federico Antinori对于科学研究的比喻也很有见地。总之强烈推荐大家去看看阿。视频网址： http://www.youtube.com/watch?v=UDoIzvKumGI&feature=user 为了方便大家观看视频，不才重操旧业，听打了视频的字幕（以前在oops也干过类似的活）。几处空白处因为能力关系实在听不清楚，如果谁能补上那就太感谢了。本来想把字幕翻译成中文的，但是太累了，而且觉得意义不大，对于看片来说，原文字幕可能感觉更好一些。 闲话休叙，各位看官观赏视频吧。 (General Introduction) This is one of the coldest places on earth. And this is one of the coldest places in the galaxy. This is the hotest place in the solar system. And this is one of the hotest places in the universe. A vacuum emptier than outer sapce. The largest number of high-tech magnets ever built. The largest, most complex electronic instrument on the planet. It views much the Genevan coutryside. But you can't see it even if you look for it. Because to find it, you have to go deep underground. At hundred meters depth, whole is in the 27 kilometers long tunnel, the large hardron collider is ready to start. (Tara Shears, University of Liverpool) Although this looks like a giant gas pipline, this machine is the most powerful particle accelerator in the world, and in fact uses most certificated technologies available to us today. More than 9,000 magnets guid two beams of protons in the circlular path through the accelerator, and the accelerate them to the speed approaching the speed of light, and then the beams crash together with that much energy as a high speed train. (Alvaro de Rujula, CERN) We can make two opposite (beam) collide with very high energy, and make new object of mass which equals to the energy total of the things that have collided, which is going to lose very little. And you're going to discover it by making it. (Tara Shears, University of Liverpool) Every second, two billion protons smash against each other inside the LHC, and recreate the condition and represent the second after the big bang. This is when the universe started and massive explosion pure primordial energy Which is really exciting about this, is some of new objects, those particles, are very different from the particles originally collide together; in fact, (are) the particles we no longer see in the world around us. Although these new particles only lived for a short time around the start of the universe, they played a fundamental role in making the universe looks the way (familiar) to us today. (Alvaro de Rujula, CERN) For one time studying the origin of the universe, one of the ingredient we need to understand is these particles that last so little. And that you cannot find them now, in mind, because they have dissipated completely from the origin of the universe. (Tara Shears, University of Liverpool) The more we study, the deeper we look into things, the more we find that there is to find out. Because there is very strange mysteries in the universe. (Brian Cox, University of Manchester) We know the mass can turn into energy, but we don't know how it happens. we know at the second after big bang, matter did not exist in normal form of protons and neutrons, but in compeletely different styles. And we know the gravity is an extremely poor and ____, but we don't know exactly how they work. Maybe the reality there is much closer to science fiction than the real world. (Tara Shears, University of Liverpool) The LHC is like a sapcecraft, venturing into the unknown, looking for the answers to these questions. And four major experiments, called ATLAS ALICE CMS and LHCb, have been dragging on detectors on the LHC ring, to catch the instances of particle collisions. We're going to use them to find out more about the mysteries of the universe. On the clean night, we can see thousands of stars. But all the stars we can see or detect only accounts for 7% of the whole universe. The rest is made of Dark Matter and Dark Energy. (Richard Jacobsson, CERN) If the universe is filled with only the matter what we're familiar with, what we can see in our own eyes when we look out in the universe, galaxies and cluster galaxies wouldn't move, rotate, and turn the way astronomer see them today. (Ilaria Segoni, CERN) We believe there is something else there that is modifying the movement, but at the moment, we cannot see or detect what the something is. (Marcos Marino-Beira University of Geneva) So there is a theory which is actually to explain that matter, and this theory is called supersymmetry. So according to supersymmetry, for each particle we see, there is another particle which is sometimes called its supersymmetical partner. One of these supersymmetrical particles could perfectly be the particle which makes up the dark matter. (Tara Shears, University of Liverpool) If the supersymmetric particles exist, the two largest experiments, ATLAS and CMS, would find them. But dark matter isn't the only thing we don't understand. (Richard Jacobsson, CERN) Antimatter are the matter created in the equally amounts at the very birth of the universe. However, we also know when antimatter and matter are coming contact with each other, they annihilate, we say. They destroy each other and vanish into pure energy. The LHCb detector is a precision instrument with which we will try and derive the true nature of this mechanism. (Federico Antinori, INFN Padova-CERN) The idea here, in the ALICE experiment is to use the LHC to recreat such high temperature condition, as well ______ first instance of the life of the universe,which should allow us to recreat tiny droplet of primordial matter. You know the _______ property. (Alvaro de Rujula, CERN && Tara Shears, University of Liverpool) The vacuum is substance, and like any other substance, you can make it vibrate. And the vibrations of the vacuum are called Higgs Particles. That is the object we're most trying to find in the LHC. The Higgs Particle is essential to fundamental physics, because it's different from any other we've discovered so far. It is the one responsible for the mass of all other particles. These detectors have been designed to look for the Higgs particles. But what if we don't see it. That will be fantastic, because it would mean that we really don't understand anything. And it's the best situation in science, for one that appreciates big revolutions is when we realize that we have actually understood nothing. (Brian Cox, University of Manchester) In my ____, reality is very different tothis three dimensional universe and might be really mind-blowing (Marcos Marino-Beira University of Geneva && Alvaro de Rujula, CERN) The recent another theory, which is called string theory, whose aim is to the unify all these particles we see in a single framework. So according to string theory, all particles are different by ways and modes of a single fundamental _____radin string. One of the surprising consquence of the string theory is that you reach the conclusion that there have to be extra dimension in the universe. The LHC is lucky enough to penetrate with its very high energy inside this point that contains extra dimensions. That complete new field opens up of possible new discoveries. (Tara Shears, University of Liverpool) You're looking it, through thousand tons of massive electronics, which will be put together with the precision of 5 microns. That's five thousands of a milemeter. And it takes many companies, hundreds of university and research institudes, and thousands of scientists and engineers to put these precision instruments together. (Jim Virdee, CERN-Imerial College, London) The detectors, like CMS and ATLAS, are the most complicated operators that scientists ever seen. (Tara Shears, University of Liverpool) The LHC and its detectors observe billions of interesting events within a month. But we need the computer "Grid" to tell us what we found. (Lisa Randall, Harvard University) There could be some discoveries about nature's spacetime, or what's really there and what's fundamentally there. (Alvaro de Rujula, CERN) We could make complete theories of new particles. We could make one hole, which are little holes in spacetime, in which we can go from one point of space and time to another space and time. So you can travel to another time. (Federico Antinori, INFN Padova-CERN) Scientific Research is an exciting trip, with a fuzzy map and unknown destination. We are like all the time explorers. We know there is a lot of there to discover, but if we knew exactly how and when we will discover it, it wouldn't be research. (Tara Shears, University of Liverpool) And research is the driving force behind what we live on. Because none of the things we enjoy would exist without fundamental research, like electricity, magnetism and nuclear physics over the past two centuries. No man to apply these researches on candle for example, would give us an electrical lights. Science need space for creativity and imagination, and LHC is what can take such a journey into unknown. 另附 LHC RAP 视频（那个女孩很有才阿，也粉可爱哦） http://www.youtube.com/watch?v=j50ZssEojtM&feature=related 引用通告此日志的引用通告 URL 是： http://lifengphysics.spaces.live.com/blog/cns!5199E46D9E4C2855!558.trak 引用此项的网络日志
|
|
|
