Ultra-Dimensional Technology Era

"I will pay attention." Wei Feng nodded.

After changing into a set of lab coats, the two headed towards the interior of the physics laboratory.

"Mingzhe, do you have any experiments to do?"

"You should know the current situation in the physics world. The feast of high-energy physics is over. If there is no particle collider that exceeds the current energy level by more than a hundred times, I guess there is almost no room for progress in high-energy physics."

Wei Feng nodded helplessly. Of course he knew about this, but let alone a particle collider with a hundred times the energy level, even a particle collider with about ten times the energy level is full of difficulties.

Just look at the particle collider in the Western Confederation.

As for those who advocate the construction of a large particle collider in China, their ideas are very complicated, but this project is undoubtedly a huge burden for the country.

It is conservatively estimated that it will cost hundreds of billions of Chinese dollars, and it will definitely be more than that in the later stage. Adding maintenance costs and usage costs, even the rich and powerful Xizhou Alliance will almost be unable to continue.

This thing is said to be important, and it is indeed important for high-energy physics, but for the current level of development of engineering, these data are not used at all, and even if there are results, they are used as wedding dresses for others.

On this point, Wei Feng and Mr. Yang have the same point of view.

"Mingzhe, you don't plan to build a particle collider, do you, we little shrimps, can't afford it?"

"I do have that plan."

grunt!Wei Feng put his hand on his head: "You don't have a fever"

"Haha!" Huang Mingzhe chuckled, and he tapped his temple with his finger: "We eat brains."

"Is there still a low-cost particle collider but the energy level is not enough? Westerners have already figured out those results. Is this necessary?" Wei Feng asked suspiciously.

"Do you know the tail field acceleration?"

"End acceleration" Wei Feng was stunned: "But this technology has two fatal flaws, you must know it."

"Isn't it just out-of-phase and high-energy short-pulse laser?"

Wei Feng glanced at Huang Mingzhe speechlessly, he said, don't stand up and talk, it won't hurt your back.

It is difficult to solve the phase loss alone, and the following high-energy short-pulse laser.

Laser wakefield acceleration requires a high-energy short-pulse laser with an energy level of 3000J. Currently, the most powerful high-energy short-pulse laser in the world is the ELI laser of Xizhou, with a total energy of only about 250J.

In other words, even if the dephasing problem of laser wake field acceleration is solved, it is tantamount to wishful thinking to increase the energy level of the laser by more than ten times.

"In the final analysis, high-energy lasers are just a material problem. I have a way to solve this problem." Huang Mingzhe is sure to increase the energy level of the laser by more than ten times.

"Our materials research institute is so powerful," Wei Feng asked in surprise.

"Anyway, don't worry about the material problem. The rest is the phase loss problem. We can work together to find a way to overcome it."

Wei Feng thought for a while, if the problem of high-energy lasers can be solved, then they only need to solve the problem of phase loss, and the laser wakefield accelerator is ready to come out.

Compared with traditional particle accelerators, laser wakefield accelerators can be made very small.

The traditional particle accelerator is 100GeV/KM, that is, to reach the energy level of 100GeV, it needs to be accelerated for one kilometer.

The laser wakefield accelerator is 100GeV/M, and it only needs a distance of one meter to accelerate to the energy level of 100GeV.

Now you know the difference between the two!If it wants to reach the energy level of the large particle collider of the Xizhou Alliance, the laser wakefield accelerator only needs a room of tens of square meters.

Therefore, the cost is also very different. A laser wakefield accelerator with a cost of hundreds of millions can achieve the effect of a large particle collider with a cost of hundreds of billions.

Vote with your feet, you know which option to choose.

"Okay, I'll do it." Wei Feng can only be a dead horse as a living horse doctor, not to mention that the development of high-energy physics is conducive to his research in another direction.

The two of them devoted themselves to solving the problem of phase loss. Although Huang Mingzhe knew that Wei Feng, the later generation, had solved this problem, he still had only a half-knowledge of how to solve it.

However, Huang Mingzhe's self-confidence infected Wei Feng, and the two of them devoted themselves to research even on National Day and Mid-Autumn Festival.

With the passage of time, Huang Mingzhe and Wei Feng are getting closer and closer to the dephasing of the tail field acceleration. Huang Mingzhe's strong mathematical skills allow Huang Mingzhe to know everything about physics.

On the other hand, the Institute of Materials also received the task of Huang Mingzhe to develop a short-pulse laser material with a total energy level of 3000J.

This material is related to photosensitive materials. Faced with the heavy task, Ma Zhili and others are now in pain and happiness.

After all, new materials are discovered by them every day. They have done what others have done for 100 years a year. Can they not be happy?

Chapter 63 Unphased Coda Acceleration

Wei Feng grabbed his hair, thinking about how to solve the problem of phase loss in the laser tail field acceleration.

At present, the low-energy particle collider has nothing to study in high-energy physics, because most of the achievements have been figured out by everyone.

If you want to make high-energy physics go a step further, the collider needs to have at least an electron energy of Te ∨ magnitude.

Since the acceleration capability of the laser wake field is 100GeV/m, wouldn’t it be enough to accelerate 10m? One of the most important constraints is phase loss.

The phase is the phase of the phase. The plasma wave of the coda wave can be regarded as an approximate sine function. Then in a y cycle, the electric field strength is positive in the first half cycle, decelerating to the center, and negative in the second half cycle. , to accelerate electrons.

Therefore, the electrons should be confined to the acceleration phase of the second half cycle.

But the problem is that the laser propagates in the plasma, and the speed cannot reach the speed of light due to dispersion, so the speed of the wake cannot reach the speed of light.

However, electrons at the GeV energy level are very close to the speed of light (the relativistic factor gamma is about 2000), so there is a relative speed between the electrons and the wake wave. The electrons move forward slowly and then run out of the acceleration phase and enter the deceleration phase. It cannot be increased any more.

The dephasing length is also on the order of mm to cm, which is why it can only be accelerated to the GeV level at present.The dephasing thus limits the highest electron energy.

Huang Mingzhe suddenly said: "If we want to reach the electron energy of TeV, we can only find another way."

"Another way you have an idea"

"One acceleration is not enough, then add a few more times."

Wei Feng thought about it, and suddenly his eyes lit up, but then he shook his head again: "No, if you do this, what is the difference between the endfield acceleration and the traditional accelerator?"

"..."

Huang Mingzhe immediately understood Wei Feng's meaning. The multi-stage joint acceleration scheme he proposed, even if the single-stage acceleration can reach 10GeV.

To achieve the target TeV-level collider, the equipment will be huge and the cost will be greatly increased, and the advantages compared with traditional accelerators will basically not be reflected.

And let alone 100 levels, at most two levels can be achieved at present, and the acceleration energy is at the 100MeV energy level, which is pitifully small compared to the 1TeV target.

The reason is that it is too difficult, and multiple laser wakefield acceleration stages need to be precisely matched on the time and space scales of femtoseconds and microns.

The speed of high-energy electrons is basically very close to the speed of light, and the propagation speed of the laser in the plasma is required to be the speed of light without losing phase.

Plasma is a dispersive medium, how could it be possible to achieve the speed of light? Huang Mingzhe bit his pen in distress.