The main function of the particle collider is to accelerate the two particle streams and make them collide at a speed close to the speed of light. Particles collide and split at high energy to produce unknown material forms, thus studying the origin of everything in the universe. The device can carry out collision experiments on basic particles such as protons and electrons.
In order to obtain ultra-high-speed particle flow, particle colliders usually use annular super-strong magnetic field to accelerate particles. To reach the speed of light, the annular magnetic field must be hundreds of kilometers long to accelerate the particles to the speed needed for the experiment.
The magnetic field generated by the high-intensity current of the annular magnetic field of the particle collider is bound to affect the surrounding environment and the normal living environment of human beings. Therefore, in order to avoid damage to the environment, the annular magnetic field must be built hundreds of meters underground, which leads to huge engineering and extremely expensive construction costs.
After the completion of the European particle collider, the "God particle" Higgs was discovered in the collision experiment. Recently, it is reported that two new particles have been discovered, indicating that the collider is only an experimental device for high-energy physics research.
As for whether to build a particle collider in China, it needs to be fully demonstrated. Firstly, whether there are top physicists in China who can complete relevant experiments and make achievements in the field of quantum physics; Secondly, whether the collision experiment can help the development of national economy and develop new energy sources with little impact on the environment; Thirdly, whether the construction project can promote the technological progress in related fields and make China make rapid progress in aviation, materials and other fields; Fourthly, does China have enough spare money for the luxury consumption of the collider?
To sum up, the contribution of the particle collider to the future scientific development is debatable. If China has a lot of world-class scientific achievements in astrophysics and quantum physics, it is necessary to build a collider. If there is a lack of relevant researchers, isn't it a wedding dress for others?
The picture comes from the network!
Whether the particle collider (CEPC) should be built has been debated for several years. The supporter is Professor Wang, director of Institute of High Energy Physics of Chinese Academy of Sciences and academician of China Academy of Sciences, while the opponent is Mr. Wang. Both sides have publicly expressed their views and opinions, but for reasons, Mr. Yang's opinion is more pertinent.
Not that it's useless to build a collider. Mr. Yang's point of view is that the collider is not supported now, because it will cost a lot of money and it will cost a lot of money every year. For example, LHC in Europe has more than 6,000 physicists and researchers working here before and after, and needs a large sum of money for research every year. LHC's greatest achievement was the discovery of Higgs particle in 2065, 438+03. At first, the United States also wanted to build a SSC, the largest collider in the world at that time, but later this plan was cancelled for some reasons. SSC, which is already under construction, was forced to shut down and $3 billion was thrown at Shui Piao. Although the United States has not built a large particle collider, its basic scientific research is no less than that of Europe.
The construction of particle collider is not only the construction cost, but also the follow-up cost, maintenance and upgrade cost, etc. These add up to a lot, which is one of the reasons why Mr. Yang opposes it.
It's not up to us to decide whether to build or not. It is indeed beneficial to build it, which can attract many scholars and physicists to study it, and also help to cultivate relevant talents in China, and it is more likely to discover new physical phenomena and raise new physical problems. There are reasons not to build, not not not to build, but not to build now.
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In fact, it's not a question of making it or not. If you have money, you must earn it. The question is whether we must spend so much money on it.
Why is it expensive?
In fact, when we usually buy mechanical products, there will be a statement of accuracy, especially the higher the accuracy, the more expensive the cost. We know that the study of high-energy physics is at the subatomic level, and the scales of electrons and protons are up and down to the power of 10, but it is generally not difficult to control them to collide head-on in one direction. The error of the whole operation is much smaller than most instruments on the market, so it will not be cheap from this point of view alone.
Secondly, its power consumption, operation cost and maintenance cost are ridiculously high, after all, it should be operated in such a small range. The investment in this later period will not be small.
At present, the most famous collider is LHC, with a total length of 27 kilometers. Its cost exceeds 1000 billion RMB.
Cost and benefit considerations
In fact, whether to create this question, if only from the perspective of academic research, must be created, because it will certainly help the study of basic physics.
But many things don't mean that we have to build them when necessary. Because this also has to consider costs and benefits. The collider is actually a high-cost project with unknown benefits. In fact, many countries choose which project is most likely to produce considerable results.
Our country's investment in gravitational waves, black holes, quantum communication, dark matter and dark energy has exceeded 1000 billion. If we continue to invest in this area, there will be no problem to a certain extent, but it will indeed increase a lot of research funds.
Yang Zhenning believes that if the collider is still used in high-energy physics, it will not only have no benefits, but also cost money and effort. Wouldn't it be better to put all this money into other areas that need more money and can produce more results?
Did I make him? The academic world sucks, and nothing barren has been studied. It is their skill to cheat money. The so-called collider itself is a scam, just like the water-hydrogen car, which is useless in itself, but requires people to invest a lot of money in it, tut tut. When this turtle grandson shows the cloven foot, he will resolutely oppose the construction of this thing.
The collider is a particle accelerator, which can accelerate positive and negative particles to high energy and then make them collide head-on. The large particle collider is the most powerful equipment for high-energy physics experiments, and it is also regarded as a bottomless pit for burning money by many people. Not only the construction of the collider needs a lot of money, but also the later use and maintenance, and the pursuit of higher energy is the unremitting efforts of particle physicists.
The size of electrons and protons is very small. At present, the upper limit of their diameter is less than 0.5 square meters of minus 65438+ 10. In order for such small particles to collide head-on, they must be confined to a very narrow range. At present, the LHC, the largest collider in the world, is designed as a ring with a circumference of 27 kilometers, and the width of the positive and negative proton flows close to the speed of light is in the order of nanometers (minus 9 meters). Only in this way can we feel how superb technology it needs, and of course it also needs financial technical support behind it.
The advantage of the ring collider is that particles can be accelerated many times in a fixed ring by changing the intensity of magnetic and electric fields. The stronger the magnetic field, the larger the radius of the ring, and the more particles can be accelerated to higher energy. In order to obtain a stronger magnetic field, some materials need to be cooled to MINUS 200 degrees Celsius to generate a strong magnetic field with charged superconductors. In addition, a high vacuum needs to be maintained in the ring of the collider, and a large amount of data needs to be recorded. As well as other strict requirements, the collider has become a big power consumer, and the European Large Hadron Collider can consume 200 MW of electricity when it is running.
What is even more frightening is that particle physicists seem to have no end to their pursuit of higher energy colliders. They are not satisfied with the energy of the European Large Hadron Collider, but also want to build a very large collider with a circumference of 100 km. If this collider is really built, the later maintenance and use will also be a huge expense.
The collider has played a key role in human understanding of the basic composition of the material world. After the discovery of Higgs particle, the standard model of particle physics has achieved great success. Although there is still a lot of work to be done about Higgs particles, compared with before, high-energy physics has indeed encountered a bottleneck period. Some theories predict the existence of particles corresponding to supersymmetric particles, hoping to find such particles with the collider. In fact, no trace of supersymmetric particles was found in the experiment of the Large Hadron Collider, and the supersymmetric particles were almost sentenced to death, which made physicists who supported the supersymmetric theory very disappointed. As for whether to build a very large collider, the pros and cons are still arguing. I'll just wait and see.
With all due respect, the name' high-energy physics' itself is wrong, and pure systems are misled by Einstein's mass-energy equation! In fact, the only particle that has not been discovered by humans is a particle with a mass of about 0.67kg, which is commonly known as the smallest black hole. It has the largest primitive gravity and inertia in the universe. It has no energy and cannot be converted into energy. Contrary to the imagination of a physical coffee machine, mass points can be made without collision energy! However, the physics big coffee people insisted on drilling a blind alley to increase the collision energy, didn't they fail? Don't!
Once we have one-tenth of the capital of the collider, we can create the smallest black hole on the desk and turn the behemoth collider into a pile of garbage!
Physics big coffee, humanities, ... another date!
Do you continue to play dumb?
It doesn't matter! We'll see!
The basic science is still not solid, so I want to build a collider. Lao Yang was right. Let's do something practical.
Basically, the large collider is looking for some theoretical particles now. To be honest, it is not of great general use to the present science, but it still has a certain guiding role to the future scientific development direction. The construction, use and maintenance of the collider is a systematic project, and the financial resources needed can be said to be astronomical. For the limited scientific research funds at present, a series of supporting facilities such as the construction, use and maintenance of the collider will greatly occupy the research and development space of other projects.
At present, only Europe has large colliders in the world, and colliders in other places are miniaturized. Even the United States, which has always been leading in science and technology, has rejected the plan to build a large collider. The billions it once invested would rather be wasted than let itself fall into a bottomless pit in the later period. So in the early 1990 s, the United States completely abandoned the plan to build a large collider, and there is no idea to restart the construction until now.
For the physical sciences in Europe, America and Japan, our country still has a certain gap with them, especially in basic physics. This is not to belittle ourselves or flatter them too much, but we are really weak in basic physics. Judging from our education mode and the direction pursued by social education now, the collider is at least under construction.
High-rise buildings have sprung up, and high-rise buildings with unstable foundations are also unstable. Even if it's made, we'll just do odd jobs next to it. Construction and use are basically dominated by foreigners, because our level can't be built by ourselves, and our physical level foundation is not enough, let alone used. Just like a person can't walk steadily, he wants to compare with others when he sees others running. Is this an excessive behavior?
In fact, the focus of the debate about the construction of the collider is not whether to build it, but when it is reasonable to build it, rather than wasting money for some hot-headed impulses. Some people say that China is rich now, but considering that China is rich now, but there are too many places to spend money, it really shouldn't be wasted. There are too many things to be developed in science. What we have to do now is to invest more in scientific research that is of direct significance to reality, which will play a decisive role in real science and technology.
We won't build it until our basic material conditions are met. By that time, our scientific and technological level has reached a certain level, and it will actually be much easier to build our own collider. Now we pay others to build our own collider, but we can't build and use it ourselves. This is really a direct waste. The funds of other scientific research projects have been compressed, which will affect the progress of other projects. Is it worth it?
In fact, there are advantages and disadvantages in building a large collider, but from the current situation, there are advantages and disadvantages, but the disadvantages outweigh the advantages. Of course, the proposal to build a large collider was put forward by a group of academicians, and the people above agreed to build it. It may not only be for scientific and technological exploration, but also for political considerations, so the discussion on building a collider is actually very clear. It's not up to us to decide whether to build it or not. The people above have their own plans.
Poetry: Will China Build a Large Particle Collider?
week
The first is scientific theory R.
What particle collides with what particle r
What was the result of the collision?
Can you really produce a new particle R?
For example, China does not have an atomic bomb.
But it was China who mastered the atomic bomb theory.
Through practice r
China made an atomic bomb.
Theoretical study on large particle collider R
This is not true.
Then it is necessary to verify R through practice.
Is there any reason why China should not build R?
If the large particle collider is built successfully, R.
The benefits are obvious and contribute to the progress of scientific research in China.
If the large particle collider is not built successfully, R.
The advantage is that it warns against deviating from the scientific theory of R.
I remembered the fairy tale of a pony crossing the river.
Is this river deep?
Only I personally tried R.
There will be a definite answer R.
On the road of scientific research, China has a long way to go.
China must strengthen the research of scientific theory.
China must contribute funds for scientific research.
China must test the truth in practice.
20 19- 1 1-8r
On the banks of Lanjiang River in Changbai Mountain