Half-immortal civilization

"Uh, hello Dr. Li."

"Well, hello everyone. It just so happens that the magnetic field generating device is about to be inspected, and you guys should come and have a look. After all, it won't be long before you will be using it. It is still necessary to know something about it.

Seeing the appearance, we went to the safe room next to it to observe the inspection process. "

The safe room is a room completely isolated from the research room here, and in the room, through the stereoscopic projection technology, 100% of the light and shadow of the situation on the other side are projected.Apart from being safer and illusory, there is no difference in anything else.

In the original laboratory, automated robots have completely replaced human labor.

The test program is undergoing final simulation and inspection.

"Dr. Li Chunhua, do you have time now? I want to ask about the principle of this magnetic field generator. It looks like a huge electromagnet." At this time, Liu Haibo asked.

"Okay, there's still some time, so I'll give you an overview. First of all, what you said is correct, this is a huge electromagnet; but it is not an electromagnet in the traditional sense, it is built by imitating the magnetic field of the earth's core The first to build this model was the US Geographical Survey more than 30 years ago.

We do not deny that the electromagnet is easy to make and has strong magnetic force.But in space, what we need is not only a strong magnetic force, but also a large enough magnetic field.It looks the same, yet different.The magnetic field of the electromagnet is only attached to itself; but the strongest part of the earth's magnetic field is at an altitude of several thousand kilometers, and extends to more than [-] kilometers into space, which is almost ten times the diameter of the earth.

In space, if we want to be able to withstand cosmic radiation such as the solar wind, we must have the same strong magnetic field protection as the earth.In this regard, considering that the portable energy of the space shuttle is limited after all, it borrowed from the original American invention to build an artificial magnetic field generator.

The core of the earth, according to the existing authoritative speculation, is an iron core that remains solid and almost colloidal under high temperature and pressure, and a large amount of liquid metal flows around the iron core. Outside the metal, there is magma, and then mantle, crust, etc.

As for the current device, we have imitated the core of the earth.

First of all, his core is an iron pipe that you can see hanging outside, we use that to replace the steel core.

And outside, we're simulating Earth's molten molten iron by replacing the flow of molten metal with liquid metallic sodium.

In fact, sodium is not the metal with the lowest melting point, but it is the low-temperature melting metal with the largest quantity and the lowest cost that can be obtained by current technology.Moreover, it is relatively easy to control, and the metal with excellent ion performance.

In our experiment, a high-speed rotating liquid sodium revolves around a high-purity pure iron core to generate a strange and powerful magnetic field.

Compared with ordinary electromagnets, it has a theoretically up to 1000-kilometer magnetic field protection layer, which will be able to defend against most cosmic radiation.However, its power consumption is extremely low, only one percent of that of an electromagnet with the same level of magnetic field strength.This is a remarkable discovery.As for the issue of energy consumption, I don't need to say more about the two best pilots. "

"Yes, energy consumption in space is very important. But I still want to ask, how much energy consumption is this magnetic field generating device?" Liu Haibo was meticulous.

"Uh...it's a bit big..." Li Yuzhang suddenly felt a little embarrassed, "To maintain such a huge magnetic field, it takes about a million kilowatt-hours of electricity per hour, which is comparable to the s001 engine. But if the space shuttle carries more The battery, it's okay. That's already good.

You know, he can defend against [-]% of the sun's radiation. "

The corner of Liu Haibo's mouth twitched a little. The power of 100 million degrees is really too high, which is a bit unbearable for the current space shuttle.Moreover, looking at Li Yuzhang's appearance, it is estimated that this is still the lowest power consumption!
"Okay, okay, let me introduce the principle of this thing to you. When you are in space, if something goes wrong, you can fix it yourself." Seeing the eyes of the two, and the suspicious eyes of Zhao Qingyun and Sun Feiyu next to him , Li Yuzhang finally decided to change the subject. "As mentioned above, it is a simulated earth's magnetic field, but because the earth is huge, even if the earth rotates slowly, the submagnetic field is still huge.

But our magnetic field generating device is different, it is very small, as you can see, it is only 3 meters, compared to the core of the earth which is thousands of kilometers, it is really a little pitiful.According to the magnetic field formula, we have to increase the flow velocity of the liquid metal sodium, and for a sufficient magnetic field, the velocity of the metal sodium is very fast.In this small space, more than 15 tons of liquid sodium are contained, and under a strong current, it is ionized and liquefied, maintaining a speed of up to 500 meters per second.

So, this thing is actually somewhat dangerous.

In addition, the generated magnetic field, the magnetosphere with the highest strength, will be within 100 meters from the core, and there will be almost no magnetic field in the middle, and the impact on the human body will be the lowest, and because the magnetic field may extend beyond 1000 kilometers, Counting the range of the protective magnetic field, it can protect objects within a range of at least 10 kilometers from cosmic radiation.This is definitely the most practical radiation protection technology in science and technology now, and it will also be the main cosmic radiation protection technology and mainstream protection technology in the next hundred years.It will put a layer of body armor on the space shuttle. "

"Then why is the iron pillar in the middle rusted?" Li Canglan asked.This thing is useful, everyone admits; but it's really ugly!

"This is impossible!" Li Yuzhang shrugged his shoulders, "Only pure iron can meet the current requirements; but the anti-rust ability of pure iron is really limited. But don't worry about this, the current one is only for experiment; In the application stage, corrections will be made. At the very least, a plastic anti-rust layer will be sprayed."

"Thank you." Li Canglan nodded.In fact, in the master company, the researcher is the highest among the people of the same level.Therefore, the two are still very grateful for Li Yuzhang's detailed and heartfelt explanation.Especially since this thing was invented for itself - at least it seems so now.

"Okay, everyone, we are going to conduct an experiment next. See if this magnetic field generating device is effective; if it is effective, what is its capacity. Because it is an experiment, we will conduct the experiment at a minimum power of 5 degrees. It cannot be lowered , metal sodium cannot be melted below 5 degrees. When you are in space, you must pay attention to one problem, that is, you cannot let the sodium cool down, otherwise it will take at least 5 minutes to reheat. And 5 minutes is enough for a solar storm to sweep you away. "

"Yeah." Liu Haibo and the two nodded, but we should pay attention to this.Once this happens, it will be verified with life.

"The experiment has begun. The first step is to spray iron powder." Li Yuzhang entered the state of scientist's research with a serious expression, while the assistant next to him was also busy.