If nuclear fusion is uncontrollable, how does the sun s fusion control itself?

The fate of a star, of course, depends on its own mass, but it also takes into account the process of star evolution. The sun is not completely engaged in fusion reactions, only in the core of the star, where the temperature and pressure are extremely high due to the effect of gravity, fusion can take place, and the outer layer of the star does not meet the conditions for fusion, but only the medium that transfers the energy generated by the core outward. As for the self-control mechanism of the star, it is based on the balance of the thermal pressure of the outward core and the inward gravitational pull

When the fusion reaction is weakened, the thermal pressure of the core is also weakened, so that the outer material falls into the core under the action of gravity, and the temperature pressure of the core increases, enhancing the fusion reaction. When the fusion reaction is too strong, the thermal pressure is strong, and the gravitational force cannot maintain the temperature and pressure of the fusion core, so the core expands outward, and the fusion reaction weakens. Under the synergistic effect of the two, the star can burn steadily and release energy smoothly. This mechanism also works at the end of the star's lifetime, when the hydrogen fuel is about to run out, the gravitational force exceeds the pressure, and the core of the star is further compressed, and the temperature and pressure increase dramatically, the fusion reaction of helium can be ignited, and if the helium is also used up, the gravitational force can compress the core and ignite the fusion of heavy elements such as carbon and oxygen.

But this is only barely life, the heavier the element, the less energy is released by fusion, and when it comes to iron, fusion will not release energy, and then no matter how much gravity is compressed, the star will not continue to burn, and the star that fails to continue to live will have a supernova explosion or ......somethingAs for the neutron stars and black holes in the future, they should also be generated in accordance with the basic laws of physics and the laws of gravitation. Of course, supernova explosions provide the energy for heavy nuclear fusion, allowing the generation of a wider variety of heavier elements, making a small contribution to the universe. <>

The sun emits the equivalent of 100 billion megaton nuclear bombs per second, but in fact the sun burns extremely slowly. Even the heating power per unit mass of the human body can exceed the power per unit mass of the solar reaction zone.

The Sun's main fusion mode is the p-p chain, and the first step in this reaction is the fusion of two protons into a deuterium nucleus, which releases positrons and neutrinos. This is a weak interaction process that occurs extremely slowly, and at the temperature pressure in the solar reaction region, it takes a proton on average about 10 billion years to degrade before such a reaction occurs; Once this step is complete, the deuterium nucleus will complete the subsequent reaction in about a few minutes; The fusion materials used by humans are usually deuterium, tritium, lithium6, lithium7, etc., and the reaction speed is much faster under the right conditions. If you replace the hydrogen on the sun with deuterium, it will also blow you up in minutes.

The core of the supersolid metal is the key to the health, and all the energy of the star is here. The Sun has at least a supersolid metal core the size of Mercury, which has never been known to mankind, and fusion is only scratching the surface.

The amount of the sun's energy is due to the effects of graviton release, and if nuclear fusion occurs, it can be a solar storm or a supernova**.

Pressure control provided by its own gravitational pull. A very simple question.

It's not that it's uncontrollable, it's that the previous technology hasn't reached that kind of control.

Electromagnetic beam control, solar magnetic field, solar magnetic pole; Earth's magnetic field and magnetic poles. If you could think, you wouldn't ask such ignorant questions.

The mass of the sun is so large that its own gravitational pull is enough to restrain a thermonuclear reaction.

It's vacuum control. Just right to Earth.

Is it possible to consider placing the reactor in the deep sea, using the pressure of seawater and cooling the seawater?

A robot helper who can enter quarks and photons at high temperatures.

Nuclear fusion can produce enormous amounts of energy, and if the energy of nuclear fusion can be controlled by humans, it can liberate the current resource model of mankind. There are a lot of more advanced inventions that can be done.

Provide energy, many cars, so that the items that need kinetic energy will be changed, some factories will change, technology will be better, and related derivatives will appear.

It may be used to study science, it may be used to study some nuclear fusion phenomena, it may be used to do some scientific experiments, and it may also lead to experiments on nuclear reactors.

These things may be used to promote the economic development of the society, use these things to provide energy, and reduce the waste of some resources.

I have time to read my article "Controlled Nuclear Fusion"Artificial sun"Why won't it work? 》.Who is faster at the speed of light or the speed of sound? 》…Look"A jasper orchid chasing stars in Lingjing Lake"Can.

First of all, whether nuclear fusion is controllable refers to whether it can be controlled artificially, and in more detail, it is to let the nuclear fuel release energy continuously under artificial control, rather than a one-time energy release like the atomic bomb and hydrogen bomb (on this topic, please refer to the question "Is nuclear fusion in the sun considered controlled nuclear fusion?"). "of). In short, when it comes to controlled nuclear fusion, the subject is people.

From this perspective, the first goal of controlled fusion is to build a fusion nuclear power plant that can provide a power output of millions or tens of millions of kilowatts; As for the nuclear reaction on the sun, it is a bit far, 100 million kilometers + 38.3 billion trillion watts (the entry for "sun" from the encyclopedia), which is far from what human beings can hope for at present or even in a hundred years - if human beings can really control the nuclear fusion carried out on the sun, then the distance between human beings and God will be even closer. Stalls are erected.

Before getting back to business, let's talk a little bit about nuclear fusion. As the name suggests, a nuclear reaction is a reaction between fibril gamete nuclei, and the nuclei are positively charged, so in order to be able to carry out a nuclear reaction, the nuclear fuel nuclei need to overcome a huge Coulomb repulsion, one of the means is to heat the nuclear fuel, so that the nuclear fuel nuclei themselves gain huge kinetic energy (velocity), and then between a large number of nuclei, two nuclei happen to be close to each other to complete the nuclear reaction (in fact, the velocity of the atoms that diffuse matter often satisfies the Boltzmann distribution, Therefore, it is possible that a nuclear reaction can occur even if the average temperature is lower than the temperature at which the repulsion is overcome, and it is no longer possible).

Now back to the point – the reason why the sun is able to carry out stable nuclear fusion reactions is actually the basic function of the sun as a star. In fact, only objects that are capable of successfully carrying out nuclear reactions can be called stars. According to the current theory of stellar evolution, before the formation of the sun billions of years ago, the position of the sun was just a very cold mass of interstellar matter dominated by hydrogen atoms, which slowly contracted under the action of their own gravity and other factors, and released gravitational potential energy to heat themselves during the contraction.

Since gravity is the main cause of contraction, the temperature of the central part of these substances is relatively highest. This is the part that triggers the contraction of interstellar matter. When the contraction reaches a certain point, the core temperature increases further to allow for a nuclear reaction, at which point nuclear fusion between hydrogen atoms releases a large amount of energy and produces radiation, which can produce a line of mechanisms that move matter outward, thus being able to resist the contraction of interstellar matter.

The higher the temperature, the stronger the nuclear reaction and the stronger the resistance, when the resistance process is so strong that the interstellar matter no longer shrinks, this constitutes a relatively stable state: if the gravitational force is large, the matter shrinks a little, then the nuclear reaction is strengthened, the resistance is greater, the matter is pushed away, and the gravitational force is reduced; If the gravitational force is smaller, the core temperature decreases, the nuclear reaction is weakened, the resistance is reduced, and the gravitational force of matter will promote the condensation of matter and increase the gravitational force. This steady state is actually a star, that is, once a stable state is formed, a new star is officially born.

This can fully explain the phenomenon that the sun did not blow up.

Humans will be affected, and it will affect the safety of our human beings, and it will affect human lives, so it will definitely be affected accordingly.