超级军网揭开宇宙秘密的利器---欧洲（CERN）大型强子对撞机
来源：百度文库 编辑：超级军网 时间：2024/05/03 03:09:33
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CERN的大型强子对撞机
为期一年的修理结束， 准备重新启动.................
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The Large Hadron Collider (LHC) - the world’s largest particle accelerator, which was developed by physicists from all over the world – is again being readied for start-up, a year after an accident put it out of order.
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The Large Hadron Collider, built by the European Organization for Nuclear Research (CERN) with the help of several thousand scientists from 85 countries, accelerates protons to an energy of 7 teraelectron-Volts (TeV).
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At four points along the collider ring, bunches of protons will collide to generate a multitude of particles and radiation to be registered by means of detectors.
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Two of these – ATLAS and CMS – are general-purpose devices, while the other two, ALICE and LHCb, are specialized.
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ATLAS is the largest such detector in history.
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In tandem with CMS it can help researchers to detect traces of the Higgs boson, a hypothesized particle that, according to the current theories, explains the existence of mass in elementary particles. Searching for this particle is considered one of the central tasks of the whole project.
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The detector ALICE is expected to record another experiment – that involving collisions of lead nuclei accelerated on the collider.
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These collisions, scientists believe, will help them to learn more about the so-called quark-gluon plasma – the state of matter immediately after the Big Bang.
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LHCb is necessary to study asymmetry between matter and anti-matter by examining interactions between particles containing so-called b-quarks.
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The scientists hope to come up with an answer to the question “Why there is no anti-matter in the observable universe?”
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The idea of building the LHC was first conceived in 1984. But official approval did not follow until 10 years later.
--
The construction of the LHC started in 2001, when another accelerator – the Large Electron-Positron Collider (LEPC) – completed its operation.
--
In the fall of 2008, the Large Hadron Collider was shut down because of an accident a few days after launch
--
A defective high-resistance electrical contact caused the magnets to lose their superconducting properties and the cooling system to break down.
--
Several tons of liquid helium were released into the collider tunnel, deforming the pipes of the cooling system and the channels where particles were circulating.
--
Repair and upgrade work took more than a year.
============================
CERN的大型强子对撞机
为期一年的修理结束， 准备重新启动.................
===================
The Large Hadron Collider (LHC) - the world’s largest particle accelerator, which was developed by physicists from all over the world – is again being readied for start-up, a year after an accident put it out of order.
---
The Large Hadron Collider, built by the European Organization for Nuclear Research (CERN) with the help of several thousand scientists from 85 countries, accelerates protons to an energy of 7 teraelectron-Volts (TeV).
--
At four points along the collider ring, bunches of protons will collide to generate a multitude of particles and radiation to be registered by means of detectors.
---
Two of these – ATLAS and CMS – are general-purpose devices, while the other two, ALICE and LHCb, are specialized.
---
ATLAS is the largest such detector in history.
--
In tandem with CMS it can help researchers to detect traces of the Higgs boson, a hypothesized particle that, according to the current theories, explains the existence of mass in elementary particles. Searching for this particle is considered one of the central tasks of the whole project.
--
The detector ALICE is expected to record another experiment – that involving collisions of lead nuclei accelerated on the collider.
--
These collisions, scientists believe, will help them to learn more about the so-called quark-gluon plasma – the state of matter immediately after the Big Bang.
--
LHCb is necessary to study asymmetry between matter and anti-matter by examining interactions between particles containing so-called b-quarks.
--
The scientists hope to come up with an answer to the question “Why there is no anti-matter in the observable universe?”
-
The idea of building the LHC was first conceived in 1984. But official approval did not follow until 10 years later.
--
The construction of the LHC started in 2001, when another accelerator – the Large Electron-Positron Collider (LEPC) – completed its operation.
--
In the fall of 2008, the Large Hadron Collider was shut down because of an accident a few days after launch
--
A defective high-resistance electrical contact caused the magnets to lose their superconducting properties and the cooling system to break down.
--
Several tons of liquid helium were released into the collider tunnel, deforming the pipes of the cooling system and the channels where particles were circulating.
--
Repair and upgrade work took more than a year.
大是够大，运行成本也是相当的高。这东西现在搞基本上是纯投入，但又不得不搞，总要经历这个阶段。中国的正负电子对撞机也很有特色，规模造价都比这个小多了。
如果lhc没有看到标准模型以外的东西，粒子物理学家就有麻烦了
这个东西强是强,就是有点脆弱.
强子对撞机是现代物理学家向往的天堂，不出意料的话将会诞生几位诺贝尔奖获得者。
To see how the world is made is the goal of science. It has penetrated the depths of the Universe, and there are theories of what happened the first instances after the Big Bang, the prime mover of Creation-yet no one knows how the solar system was born.
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ZZY458 发表于 2009-11-19 03:40 
中美都有人参与
中美都有人参与
这地方觉得是拍科幻片的好去处
ZZY458 发表于 2009-11-19 03:40
几乎所有现存的粒子物理学家都信奉标准模型及其小改
被几乎两个字除掉的，大概也就是technicolor了
超对称、额外维、little Higgs这些，大概都得算小改
被几乎两个字除掉的，大概也就是technicolor了
超对称、额外维、little Higgs这些，大概都得算小改
回复 10# huor
能打出higgs那算是给higgs本人的安慰吧，这个是拿奖做靠谱的。除了这个，其他的几个都比较悬。
特别是超对称和额外维，这些方面灌水居多。其他的像little higgs 和technicolor能够不被
实验淘汰就不错了，已经改的很恶心了，活下来就是胜利，拿炸药奖就算了吧。
能打出higgs那算是给higgs本人的安慰吧，这个是拿奖做靠谱的。除了这个，其他的几个都比较悬。
特别是超对称和额外维，这些方面灌水居多。其他的像little higgs 和technicolor能够不被
实验淘汰就不错了，已经改的很恶心了，活下来就是胜利，拿炸药奖就算了吧。
回复 9# bessel
还要看他身体够不够硬朗。
还要看他身体够不够硬朗。
huor 发表于 2009-11-21 13:57
其实各地都是一样的，就是弦论已经几乎穷途末路了。
我在国内的时候导师是搞弦论的，好几年一个课题都没有。出来之后发现这边也是一样。同导师的中国博士后师兄弦论毕业的后来转行，美国师兄原先找的这边四个人中的谁不清楚，也是好几年没啥课题才转投现在的导师。最近他们做的http://arxiv.org/abs/0911.0034
还有并不是弦论学家就不信奉标准模型。搞弦论的都会努力去把多余的维度紧制化到给出标准模型的。如果说搞弦论的不信，那只是像Harvey批的那样，年轻的学生学得不到家还没理解吧，就像我过去一样。
其实各地都是一样的，就是弦论已经几乎穷途末路了。
我在国内的时候导师是搞弦论的，好几年一个课题都没有。出来之后发现这边也是一样。同导师的中国博士后师兄弦论毕业的后来转行，美国师兄原先找的这边四个人中的谁不清楚，也是好几年没啥课题才转投现在的导师。最近他们做的http://arxiv.org/abs/0911.0034
还有并不是弦论学家就不信奉标准模型。搞弦论的都会努力去把多余的维度紧制化到给出标准模型的。如果说搞弦论的不信，那只是像Harvey批的那样，年轻的学生学得不到家还没理解吧，就像我过去一样。
我说的“信仰”的意思是指得那些传统的，继续在qcd框架下工作的那帮人，当然所有的理论必须在低能下回到标准模型，但是
究竟怎样发展理论，路线是很不一样的。
弦论如果算穷途末路的话，其他的也好不到哪里去，其实粒子物理本身就是在死亡中的一个学科，
可以考虑往宇宙学方向走，那是离粒子物理学最近的，而且是有着光明的前途的学科。
好几年没有课题是怎么回事，我猜你的意思是好几年没有paper吧。
国内导师搞弦论的不多，一只手数的过来，其实老学霸们反对弦论是有道理的。
另外美帝最最聪明的家伙都集中在弦论上，比如说小马哥这样的。
ps：很久之前是你说起等离子体加速的事儿不？去rmp看看。
其实各地都是一样的，就是弦论已经几乎穷途末路了。
我在国内的时候导师是搞弦论的，好几年一个课题都没有。出来之后发现这边也是一样。同导师的中国博士后师兄弦论毕业的后来转行，美国师兄原先找的这边四个人中的谁不清楚，也是好几年没啥课题才转投现在的导师。最近他们做的http://arxiv.org/abs/0911.0034
还有并不是弦论学家就不信奉标准模型。搞弦论的都会努力去把多余的维度紧制化到给出标准模型的。如果说搞弦论的不信，那只是像Harvey批的那样，年轻的学生学得不到家还没理解吧，就像我过去一样。
huor 发表于 2009-11-22 07:59
我说的“信仰”的意思是指得那些传统的，继续在qcd框架下工作的那帮人，当然所有的理论必须在低能下回到标准模型，但是
究竟怎样发展理论，路线是很不一样的。
弦论如果算穷途末路的话，其他的也好不到哪里去，其实粒子物理本身就是在死亡中的一个学科，
可以考虑往宇宙学方向走，那是离粒子物理学最近的，而且是有着光明的前途的学科。
好几年没有课题是怎么回事，我猜你的意思是好几年没有paper吧。
国内导师搞弦论的不多，一只手数的过来，其实老学霸们反对弦论是有道理的。
另外美帝最最聪明的家伙都集中在弦论上，比如说小马哥这样的。
ps：很久之前是你说起等离子体加速的事儿不？去rmp看看。
其实各地都是一样的，就是弦论已经几乎穷途末路了。
我在国内的时候导师是搞弦论的，好几年一个课题都没有。出来之后发现这边也是一样。同导师的中国博士后师兄弦论毕业的后来转行，美国师兄原先找的这边四个人中的谁不清楚，也是好几年没啥课题才转投现在的导师。最近他们做的http://arxiv.org/abs/0911.0034
还有并不是弦论学家就不信奉标准模型。搞弦论的都会努力去把多余的维度紧制化到给出标准模型的。如果说搞弦论的不信，那只是像Harvey批的那样，年轻的学生学得不到家还没理解吧，就像我过去一样。
huor 发表于 2009-11-22 07:59
我的情况是，不是算了东西算不出来或者结果不好写不成论文，而是导师根本找不出可以算的。
Maldacena一将功成万骨枯。当年的LLM中的第一个L他的学生林海，现在在西班牙的某个研究所做博士后，听说那里除了他就没有搞这一行的；第二个L当年的博士后Lunin，很聪明很强大有了好多以他名字命名的工作，但是经过一番思想斗争，最近还是只好去了以色列的职位
Maldacena一将功成万骨枯。当年的LLM中的第一个L他的学生林海，现在在西班牙的某个研究所做博士后，听说那里除了他就没有搞这一行的；第二个L当年的博士后Lunin，很聪明很强大有了好多以他名字命名的工作，但是经过一番思想斗争，最近还是只好去了以色列的职位
huor 发表于 2009-11-22 09:52
回复 16# huor
你是做ads对偶的啊？
你是做ads对偶的啊？
弦论有实验能证明吗？ 没有那就真的是空对空了~
huor 发表于 2009-11-22 09:52
林海？ 是不是北大物理系97级的？
林海？ 是不是北大物理系97级的？
只知道林海是北大的，应该不会错
过去学过一阵子AdS/CFT，很失败不提也罢
过去学过一阵子AdS/CFT，很失败不提也罢
新进展............
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Large Hadron Collider sets world record - CERN
The Large Hadron Collider set a new world record on Monday, accelerating its twin beams of protons to unprecedented energy levels, the European Organization for Nuclear Research (CERN) said on its website.
The record of 1.18 TeV comes 10 days after the LHC was restarted. The previous world record of 0.98 TeV had been held by the U.S. Fermi National Accelerator Laboratory's Tevatron collider since 2001, CERN said.
"It marks another important milestone on the road to first physics at the LHC in 2010," the scientific organization said.
The first circulating beam of protons successfully made it through the LHC's entirety on November 20. Last Monday, beams of protons started circulating in both directions around the LHC, and the first proton collisions were produced.
"We are still coming to terms with just how smoothly the LHC commissioning is going," CERN Director General Rolf Heuer said. "It is fantastic. However, we are continuing to take it step by step, and there is still a lot to do before we start physics in 2010. I'm keeping my champagne on ice until then."
He said the next aim would be to produce a concentrated commissioning phase to increase the beam intensity, with more proton-proton collision experiments expected to take place before Christmas.
According to CERN, the first physics at the LHC is scheduled for the first quarter of 2010, at a collision energy of 7 TeV (3.5 TeV per beam).
The international LHC project has involved more than 2,000 physicists from hundreds of universities and laboratories in 34 countries since 1984. Over 700 Russian physicists from 12 research institutes have taken part.
November 30
===============
Large Hadron Collider sets world record - CERN
The Large Hadron Collider set a new world record on Monday, accelerating its twin beams of protons to unprecedented energy levels, the European Organization for Nuclear Research (CERN) said on its website.
The record of 1.18 TeV comes 10 days after the LHC was restarted. The previous world record of 0.98 TeV had been held by the U.S. Fermi National Accelerator Laboratory's Tevatron collider since 2001, CERN said.
"It marks another important milestone on the road to first physics at the LHC in 2010," the scientific organization said.
The first circulating beam of protons successfully made it through the LHC's entirety on November 20. Last Monday, beams of protons started circulating in both directions around the LHC, and the first proton collisions were produced.
"We are still coming to terms with just how smoothly the LHC commissioning is going," CERN Director General Rolf Heuer said. "It is fantastic. However, we are continuing to take it step by step, and there is still a lot to do before we start physics in 2010. I'm keeping my champagne on ice until then."
He said the next aim would be to produce a concentrated commissioning phase to increase the beam intensity, with more proton-proton collision experiments expected to take place before Christmas.
According to CERN, the first physics at the LHC is scheduled for the first quarter of 2010, at a collision energy of 7 TeV (3.5 TeV per beam).
The international LHC project has involved more than 2,000 physicists from hundreds of universities and laboratories in 34 countries since 1984. Over 700 Russian physicists from 12 research institutes have taken part.
November 30
《天使与魔鬼》里面的情节是用其生成了反物质。。。。。。
全球的科学家结晶啊
庸俗一下
楼上的，哈哈
{:hao:}25楼太搞了.........
嗯，又开始运行了，不知什么时候能到最大能量。哦，昨天智子告诉我，他们又快有任务了。[:a4:]
25L, 哈哈哈
25L 嘲人帝 哈哈哈