Chapter 80

Therefore, Mars is not the focus of human attention, and there is only such a lonely space city above, which is mostly scientific research and transit station.

Martian enthusiasts are thinking about melting two levels of carbon dioxide to improve the Martian atmosphere and make it livable in the future.

"If, after human civilization, the population explosion, the earth and the moon are unable to live, it is possible to develop Mars Compared with other planets, this planet is better for people. At present, no extraterrestrial microorganisms have been found, and the safety is OK. " Elder martial brother Zhao suddenly said something.

Zhang Yuan responded: "I don't think it's possible in the visible future. Because the growth rate of civilized population is not high. "

Within the limits of natural resources, social system and productivity, the more the population, the better, especially the high-quality population.

But capitalism is the pill for population growth.

In the old times, limited to the shortage of resources, the earth's population had stagnated at 7-8 billion for a long time.

After the fourth World War and the "light of nuclear fusion", the whole civilization once ushered in a wave of baby booms. Now, however, the population growth rate has slowed down, and the annual growth rate is less than 1%.

It is actually very difficult to grow from the current population of 10 billion to 100 billion or even trillions. For many families, having a second child is already a very painful thing.

As for the low-quality population in some countries, no amount of it is useful.

Zhang Yuan suddenly thought: "if in the future, the development of artificial uterus technology and robot breeding, do you think it will change this pattern?"

Elder martial brother Zhao shook his head: "artificial uterus technology liberates women and is a major technology that affects the whole process of the world. With artificial uterus technology, what feminist movement can finally stop. "

“…… But I don't think it can change the fundamental aspect of population growth. Because it's the upbringing, not the birth, that matters to children. Raising consumes more energy than living! "

"As for machine support, how strong artificial intelligence is needed! Moreover, the ethical aspect may have to be discussed for a long time... "

"On the contrary, I am more worried about the revolutionary strategy of some small countries. A large number of foreign immigrants will lead to the decline of the influence of the main nation. The conflict between ideology and culture is likely to make bad money replace good money. This has happened many times in history. "

Zhang Yuan sighed, "well, that's true."

After another visit to the observatory, Zhang Yuan suddenly found that there was an electronic reading room hidden here, called "star library", in which a few people were reading.

He thought to himself that those who can enjoy solitude in such a place must be top experts. Maybe we can try it later

After a casual visit, they turned around and went back to the railcar.

The end of this journey is the tail of the carrier, where the fusion engine is located.

Nuclear fusion engine, its largest ring diameter is more than 400 meters. Just the tip of the iceberg is enough to make people feel shocked.

Seeing this giant, Zhang Yuan felt that his heart began to burn.

The long-term work, happiness and sense of achievement here are definitely much stronger than cleaning the cabin.

On a recent test screen, a blue and white plasma is discharging, and various parameters are displayed nearby.

Zhang Yuan narrowed his eyes. He saw a temperature on the sign, about 750 million degrees!

"Here you are

"Professor Ding."

See the room in front of a figure, Zhang Yuan quickly said hello.

Academician Ding is here to understand the changes of various parameters, and he happens to meet them.

"Zhang Yuan, it seems you like it here. If you want to fully understand this big thing, you may have to learn some knowledge about mechanics, nuclear physics and plasma. There are many things to learn. "

Naturally, Zhang Yuan is quite positive, "what can I do now?"

"Read some papers first. If you don't understand, you can ask your elder martial brother. You can also monitor the trajectory of plasma turbulence here. By the way, you can study the structure of the whole engine, such as the thermal value of helium cooled solid blanket, the impact of periodic impact on helium Turbo expander of cryogenic system, etc. you can choose your own topics. I will open a certain database for you. ”

"if you fully understand the working principle of the whole engine, the rest of the space engineering will be a little fun for you."

Zhang Yuan answered and found his seat.

He excitedly fixed himself in his seat, trying to find some papers in the database.

Here, he can even read all kinds of mechanical control code!

Of course, only the right to read, no right to modify.

Zhang Yuan is very pleased to find that his father has done a lot of work in the whole nuclear fusion control project, and his curiosity and eagerness to try are naturally greater.He thought to himself: "the work of nuclear fusion sounds like a big one. If Li Zhendong meets him, I don't know how long he can boast about it..."

Nuclear physics, similar to high energy physics, is a kind of theory to study micro deep level. Nuclear physics tends to be applied laterally, while high energy physics tends to be applied in micro deep level.

But in this era, high energy physics began to decline.

The main reason is that what can be explored clearly has gradually been explored clearly, and what cannot be understood is still not understood.

In the 23rd century, the Xia Academy of Sciences spent a lot of money to build a larger Collider, but the final result was that it could not hit any particles beyond the expectation, and this project became a classic white elephant project.

The standard model based on non Abelian gauge field seems to be the supremum of human understanding of nature.

According to the estimation of some scientists, if you want to verify the higher level theory and find some unexpected physical phenomena, you need to build a ring solar system collider! That is to say, the length of the collider has to circle the solar system.

For human beings, it is an impossible task.

This conjecture is called the "great desert" conjecture.

Matter in nature, in different accelerator energy, will produce different properties.

At the energy of 10 electron volts, one can observe the disintegration of atoms into nuclei and electrons.

In the range of 10 ^ 6-10 ^ 7 EV, the nucleus can be observed to disintegrate again into neutrons and protons.

At the energy of 10 ^ 11 EV, the weak particles can be observed, which is the proof of the unified theory of weak particles.

LHC, which was once in Europe, can reach the energy level of 10 ^ 13 EV and found the Higgs boson.

Xia Guo's Collider, which consumed 100 billion level funds, once again raised the energy level to 10 ^ 15 ev.

And then what?

No, no new physics is observed at 10 ^ 15 electron volts, but the "energy level desert" conjecture holds that there will be no new physical phenomenon at 10 ^ 24 electron volts. According to the current theory, if you want to continue to study high energy physics, please increase the energy level by a billion times!

This is also the origin of the ring solar system accelerator, which requires an accelerator with a circumference of 100 billion kilometers to do this.

100 billion kilometers!

But that's not all about high energy physics. With an accelerator of 100 billion kilometers, it is likely that only the unity of strong force, electromagnetic force and weak force can be observed, and gravity has not yet been wrapped in it.

If you want to thoroughly study quantum gravity or the legendary theory of everything, please build an accelerator with a length of 1000 light years, namely the ring galactic accelerator!