I ask you to build tractors, but you build rockets?

The speed of photons is the speed of light, and alpha particles are only about 5% of the speed of light. If we want to use them to propel a spaceship of several thousand tons or tens of thousands of tons within a certain period of time, there is nothing we can do.

This is why Zhao Zongyao wrote it in an "overview" way. He himself felt that it would not be possible in his lifetime...

This is especially true for the base. Lin Ju’s new mission is to study a fusion radiation thruster with a thrust of 1,000 tons. After testing 10 million, the progress is still 0. It cannot even reach the lowest 0.1%, which is far beyond the limit. Current world capabilities.

However, this at least shows that radiation propulsion is feasible, and the base currently does not have the ability to conduct research on it.

Even laser-confined inertial plasma fusion, the third-generation fusion technology realized in that world, has a technical difficulty that can only be looked up to.

The year 2039 in another world does not mean that their technological level is the same as this world line. The core temperature of their fusion reactor has exceeded 1.5 billion degrees Celsius and is charging towards 2 billion degrees. Only then has the low-energy maintenance reactor been achieved. index.

Controlling the violent and irregular plasma at 1.5 billion degrees Celsius and reacting obediently according to a predetermined route? This request is no different from talking in sleep to current scientists.

After all, the higher the temperature, the more violent the movement of particles, and the difficulty of interference increases exponentially. It is simply unimaginable how chaotic the particles would be at a core temperature of 1.5 billion.

"How's that? How sure are we?"

Lin Ju turned over the scraps of paper scattered on the table and asked the question he was most concerned about.

Ye Changsi then raised his head and sighed, blinking his bloodshot eyes.

"In the future... this technical route from another world is quite excellent. It uses almost all the means that humans can think of, especially weak force constraints... It is simply contrary to common sense, but it is not a reactor design drawing. We just have a reliable basis.

In fact, it is impossible for us to achieve it. The pre-processing technology alone is too much and too complicated. Ten, twenty years? If no more information is obtained, twenty years of continuous investment should be able to solve the front-end technology. "

Twenty years? Lin Ju was about to say something, but was interrupted by Cheng Nankai who stood up.

"Twenty years is just an ideal number. In fact, we have to spend ten years studying particles first."

Cheng Nankai slowly sorted out several manuscripts:

"I mainly spent time studying Yu Qian's formula. It is indeed correct, but it only summarizes a rule.

If we also plan to use it to create a constraint device, we must have more information. The weak force is fermions...that is, the force between particles such as neutrinos and electrons. Its research requires the help of K mesons. "

In 1949, scientists saw a strange particle for the first time in a cosmic ray photo. Four years later, they artificially obtained this particle using a powerful accelerator, and later named it a K meson.

There are four kinds of K mesons, two of which carry positive and negative charges respectively, denoted as K±, and the other two have no charge, denoted as K° and K.

Therefore, the K-24 meson is called a strange particle. The original meaning is that the generation time of this type of particle is very short, only about 10-24 seconds; but the average lifespan is generally more than 10-10 seconds, which is relatively long.

Cheng Nankai explained what K mesons were, and then said:

"K mesons need to be obtained through particle accelerators."

"And what is needed is a very large, very high-energy accelerator, preferably larger than Europe's LHC (the world's largest hadron collider)." Ye Changsi added immediately.

"This process cannot be omitted unless we obtain the most direct drawings and construction technology of the nuclear fusion device, but if we want to truly master it, we still need an accelerator."

"..."

When it comes to accelerators, Lin Ju immediately understands that the base cannot afford them.

The cost of particle accelerators is too exaggerated. It cost Europe a total of 21 billion euros to build the LHC. Moreover, the maintenance and energy consumption of this damn thing are extremely exaggerated. It can start up at least hundreds of millions to more than a billion, and the electric power is comparable to that of a small city.

The LHC (Large Hadron Collider) has a diameter of 8.6 kilometers and a circumference of 27 kilometers. An accelerator larger than this would really require a nationwide effort to complete.

Therefore, when Lao Yang wrote a letter not recommending that the country engage in accelerators, they would have no benefits and were extremely expensive. For the country at that time, it was really a waste of national power and no return.

Even if domestic prices are lower, I'm afraid it will take at least 100 billion to build a super-large accelerator. And aerospace and military and other aspects have already increased expenditures by hundreds of billions compared with the original world. It is really difficult to build another accelerator project.

Besides, how do you convince the higher-ups to spend so much money on accelerator?

Fortunately, Ye Changsi took the initiative and said:

"The theoretical value of this book is very high. We don't need to rush to carry out the fusion project for the time being. Just the preliminary theoretical research will take a long time, and it will not use equipment that is beyond the times.

But I still have a suggestion: increase the number of nuclear scientists to more than 100, and see if we can participate in EAST. At least it is not purely theoretical research so we can collect some data. "

Cheng Nankai: "I have similar opinions, and frankly speaking, only Lao Ye is the one who has the ability to carry out research now. At least three A-level or above scientists are needed. The field of high-energy physics needs excellent geniuses."

"Well……"

Lin Ju understands very well that cutting-edge physics does not require quantity. A genius who has not been born for a hundred years is more useful than 100 scientists with professional backgrounds. What it requires is an extremely smart mind and creativity. This kind of talent is completely Found by luck.

And domestically... Lin Ju suddenly thought of Academician Yu whom he met in Qiongzhou. He was actually a super genius in the field of fusion, as was Lao Yang, but they were both too old and it was difficult for them to carry out high-intensity scientific research.

We can only hope that when the system tasks are completed again and super talents like Einstein, Bohr, Fermi or Liang Qian are sent over, we can hope to carry out these physics explorations that are difficult for ordinary people to even understand.

Or the system was kind enough to provide an A-level skill card. Lin Ju guessed that the Space Station Advance or the moon landing must be considered major achievements. It would be great if there were such rewards.

Although Ye Changsi frankly explained that the content involved in this book was too complicated for the base, Lin Ju was still itchy by the prospect of nuclear fusion. After all, nuclear fusion can make people see the dawn of the stars and the sea. He can now It is certain that nuclear fusion technology will be successful this century.

"Then how do we join EAST? It is the world's leading nuclear fusion project, and it may be difficult for us to join it."

Lin Ju asked one last question, but Ye Changsi just smiled and pointed at Cheng Nankai.

"Don't underestimate yourself. Xiao Cheng is probably the most promising nuclear physicist of the younger generation in the eyes of the Academy of Sciences. It will definitely be no problem to let him come forward."