The far side of the Moon.

Doppler crater, Doppler base.

Due to its location, it became the first choice for Homo sapiens to build mass projectors on the far side of the moon.

This base is larger than the large bases on the front side of the moon, and the space division invests almost 80% of the resources of the lunar branch here.

After more than a year of continuous construction, the Doppler mass projector project has been 55% completed.

In particular, the construction of the ring-shaped acceleration track, which is the core, has been largely completed.

The Doppler mass projector project is not the same as the Earth's dandelion project.

The Dandelion project required the construction of a ring pipe, as well as a vacuum, as well as a large floating hose to ensure safety.

However, the Doppler mass projector does not need to be so troublesome because of the environment of the Moon, after all, the Earth has a dense atmosphere, and the surface of the Moon is in a state of near vacuum.

Therefore, the annular track of the Doppler mass projector project does not need to build a sealed pipeline, but only needs to build a magnetic binding system.

Taking into account the shape of the spaceship, it is better to have a long shape, preferably similar to the shape of a train.

The professional team responsible for the design of the Doppler mass projector refers to some schemes of overhead railways and stratospheric railways, and uses ring-shaped superconducting coils on electromagnetic acceleration orbits, which can generate a series of strong magnetic fields to firmly bind the spacecraft to orbits.

Thousands of synchronous robots responsible for the construction project, together with a large number of engineering equipment, are rapidly perfecting the ring orbit of the Doppler mass projector.

The chief engineer is Su Changli, who was in charge of the dandelion project before, and Bai Sha, the deputy who assisted him before.

The two were in the industrial zone of the Doppler base at this time.

Of course, the two of them also came over using synchronous robots, and they are still on Earth.

"Baisha, your progress over there is a little slow!"

Bai Sha is also very helpless: "There is no way, the self-production of building materials has only been realized recently, and it has been relying on the material support of the Earth Headquarters before." ”

Su Changli asked: "Now that the industrial zone can produce its own low-temperature superconductors, the next step is to place the superconducting coil on the track, when do you estimate it will be completed?" ”

"The industrial zone can only produce 300 coils per month, and the production capacity is still a little insufficient!" Bai Sha still had uncertainty in his words.

After all, each of these large superconducting coils costs about 137 tons, and the production capacity of the industrial area of the Doppler base is obviously insufficient.

The length of the whole ring track is 300 kilometers, and an average of 40 coils are used per kilometer, 12,000 coils are required for 300 kilometers, and only 300 coils per month can be produced in the industrial area, which takes 40 months.

"Is it possible to increase production capacity?"

Head of the industrial zone, Marquez? Fernando shook his head: "I'm sorry, the production capacity can only be increased by 50% at most, we can't blindly expand the production capacity, after all, this is a one-time investment project." ”

Fortunately, Homo sapiens' biomaterial synthesis technology is different from the traditional industrial model, otherwise the Doppler site would not dare to expand such a large production capacity.

The core reason why modern industry does not have a burst of production capacity is that the expansion of the production line needs money.

If it is a daily necessities and fast-moving consumer goods, it is okay, and the production capacity has a stable demand to digest.

However, for other non-FMCG and daily necessities products, blindly expanding production capacity often only leads to very serious consequences.

For example, shipyards, the reason why many shipyards prefer to wait for several years to expand their shipyards is that they don't want to go bankrupt.

Suppose there is an order for 100 container ships now, and you are the owner of the shipyard, are you willing to build 100 ships in 10 years? Or 100 ships in 1 year?

It seems that the option of building 100 ships in one year is very good, and you can make money in a short time.

But the problem is that building 100 ships in one year means that the shipyard must have docks, supporting facilities, and workers to build 100 ships at the same time.

In the unlikely event that the economy is bad next year, perhaps the demand for shipping is saturated, the dockyards and equipment invested in the early stage will be idle, and a large part of the workers will have to be laid off.

Therefore, the best choice is actually to build 100 ships in 10 years, which can be trickled down for a long time and reduce one-time investment risks.

This is an awkward problem that modern industry must face.

Why should automobiles, shipbuilding, computers, mobile phones, and household appliances be planned for scrapping?

It is because of the capacity of the factory production line, in the market competition, forced to expand in a disorderly manner, but the market demand is not unlimited, once the market is saturated, it means that the factory is going to have problems.

Although a giant enterprise like Homo sapiens can plan a quota when building a product production line according to demand, it is not easy to have overcapacity.

However, the fundamental solution to this problem is actually the large-scale application of biomaterial synthesis technology.

Why can biomaterial synthesis technology solve this problem?

The reason is very simple, because the parts culture cabin and parts cultivation pool derived from the biomaterial synthesis technology are, to a certain extent, very versatile.

In other words, the line can be used today for the production of televisions, and tomorrow it can be seamlessly transferred to the production of mobile phones.

At the same time, the production cost of this production line is very low, and the cost of production line transformation is not high, as long as the special parts and materials are replaced to synthesize microorganisms.

This universal production line means that Homo sapiens' factory can produce a certain product on a large scale in a short period of time.

If the internal demand is saturated, it will be converted into a production line for other products.

In this way, factories will not shut down due to market saturation, and the temporal and spatial imbalance between production capacity and demand will be greatly improved.

This is the case with the superconducting coil production line at the Doppler site in front of us.

According to the traditional industrial model, after 40 months of production, the line will have to be stopped because of the exhaustion of demand.

No matter how strong a company is, it can't withstand this behavior of scrapping a large production line in three or four years.

Marquez? Fernando thought for a moment: "I can try to apply to the headquarters and see if I can increase the size of the cultivation pool." ”

Su Changli nodded: "You guys can do it!" ”

Bai Sha thought for a moment: "By the way, a large number of solar panels will be built next, and you can apply for this reason." ”

"Thanks for the reminder." Marquez? Fernando also thought of this reason.

Although the core power supply system of a Doppler mass projector is a nuclear power plant, solar panels are essential.

The reason why solar panels are laid is not to generate electricity, but to insulate heat.

That's right, it's for insulation.

The raw material of the superconducting coil of the Doppler mass projector is not a silver-based superconductor with a relatively high cost, but an iron-aluminum-copper alloy, which can maintain superconductivity below minus 143 degrees Celsius, and can be taken locally on the moon with a very low production cost.

The temperature difference between day and night on the moon is very large, and the surface temperature is below minus 200 degrees Celsius at night, while it can reach more than 100 degrees Celsius during the day.

Therefore, in order to maintain the normal operation of the superconducting coil, it is necessary to block the exposure of sunlight.

After much deliberation, the design team decided to lay a large area of solar panels to shade the tracks and coils underneath.

In doing so, you can kill two birds with one stone.

It can not only ensure that the bottom of the solar panel is not irradiated by sunlight, but also maintain an ultra-low temperature of minus 200 degrees Celsius.

Solar power can also be used to supply a portion of the energy to industrial zones and bases.