After returning to Jiangcheng, Pang Xuelin's life became calm again.

Occasionally, he went to Jiangcheng University or Westlake University to discuss the industrial production scheme of superconducting 128 materials with Cao Yuan and Li Changqing, and the rest of the time, Pang Xuelin focused on the study of the existence and smoothness of the N-S equation.

Now that the problem of superconducting materials has been solved, there are only two major technical difficulties left in the field of controllable nuclear fusion: ultra-high-power lasers and ultra-high-temperature plasma fluid control.

Pang Xuelin, a high-strength anti-radiation material, was not worried, and he decided to adopt the helium fusion mode in one step, which can greatly reduce the production of neutrons.

Therefore, the radiation-resistant materials produced by domestic nuclear fission reactors can fully meet the needs of helium fusion reactors.

For the rest, ultra-high-power laser manufacturing, this project is mainly promoted by the Laser Fusion Research Center of the China Academy of Engineering Physics.

Since the 60s of the last century, the invention of lasers has opened a door to the problem of how to heat matter to extremely high energies.

It was the Soviet experts who first considered using lasers to heat the raw materials for nuclear fusion, because the method is energy-intensive and does not need to come into contact with the heated substance, which is simply similar to focusing the sun and igniting wood chips.

However, the energy of a single laser is too low, so in order to solve such a problem, the energy of multiple lasers needs to be focused on the same point.

This may seem like a simple question, but it's actually very difficult.

This is because it is necessary to ensure that the heated object is heated evenly in all directions during a short heating time and collapses uniformly towards the center of the sphere.

This requires not only exceptionally precise control of the direction of each laser, but also a tight control of the amount of energy of each laser in this extremely short period of time.

At present, the United States has made the fastest research progress in this field, and its national ignition device is currently experimenting with focusing 192 lasers on the same point, including 192 laser beams, and outputting 1.8MJ ultraviolet laser.

The laser driver of comparable size to the NIF unit is the French LMJ laser unit, which is designed to contain 240 laser beams and output 1.8MJ ultraviolet laser.

And in this area, China has also invested huge sums of money in research.

This is China's "Shenguang" plan.

In the 60s of the 20th century, with the advent of lasers, scientists put forward the scientific idea of laser inertial confinement fusion.

In 1964, Academician Wang Ganchang put forward the initiative of studying laser fusion, and the "Shenguang" program was officially launched in China.

The project is jointly tackled by the Chinese Academy of Sciences and the China Academy of Engineering Physics, and Shanghai Optics and Mechanics and Changchun Optics are both collaborating units.

In 1985, the Shenguang I device was completed and put into trial operation.

Shenguang I has been running continuously for 8 years, completed many rounds of important physical experiments, and has made a number of major achievements with international advanced level in the experimental research of ICF and "863" related projects, marking that China has entered the world's advanced ranks in this field.

In 1994, Shenguang I retired and started the development of Shenguang II. device.

In 2001, China's "Shenguang II" high-power laser device was built in the Shanghai Institute of Optics and Mechanics of the Chinese Academy of Sciences, and its advent marked that China's high-power laser scientific research and laser nuclear fusion research have made great strides into the world's advanced ranks.

At that time, only a few countries, such as the United States and Japan, could build such a sophisticated giant laser.

The overall technical performance of "Shenguang-2" has entered the top five in the world.

The Shenguang II high-power laser experimental device is composed of an eight-channel system and a multi-functional high-energy laser system, which is the only high-power neodymium glass solid-state laser experimental device with active probe light in China at that time.

It can emit laser beams with a power equivalent to several times the total of the global power grid in an instant of one billionth of a second to gather on the target, form a high-temperature plasma and initiate fusion, and then carry out experimental research on the physics and inertial confinement fusion of laser-plasma interaction.

In 2015, the Laser Fusion Research Center of the China Academy of Engineering Physics in Mianyang, Sichuan Province successfully completed the research and development of Shenguang III.

The output beam of Shenguang III is 48 beams, with a total power of 180KJ, which is only one-tenth of the national ignition device of the United States.

However, due to the slow progress of the LMJ project in France, Shenguang III. has become the second largest fusion ignition device in the world after NIF.

Previously, the superconducting 128 project was successful, and when Pang Xuelin went to Beijing, he had discussed the nuclear fusion project with the leadership.

At present, the China Academy of Engineering Physics is conducting research and development of the Shenguang IV project, the overall parameters are equivalent to about twice that of NIF, and the maximum power can reach 4MJ, but it is still three orders of magnitude away from the gigajoule energy output required for helium nuclear fusion.

However, Pang Xuelin is not too worried about the engineering difficulties here.

In this trip to China's solar world, among the rewards given by the system, there is an engineering and technical solution for gigajoule laser fusion, and from the perspective of China's research and development experience in the "Shenguang" project, it is not difficult to manufacture a gigajoule laser fusion device according to the scheme given by the system.

On the contrary, the problem of high-temperature plasma turbulence must be solved from a theoretical point of view.

Therefore, before solving the problem of high-temperature plasma turbulence, Pang Xuelin is not ready to take out the technical route of the gigajoule laser fusion device.

On the contrary, in order to promote the construction of the electromagnetic catapult space launch project, Pang Xuelin took out the relevant technical solutions of the molten salt nuclear reactor and handed it over to the China Academy of Engineering Physics to promote research and development.

China Academy of Engineering Physics is the original Ninth Research Institute of the Ministry of Nuclear Industry, which is mainly engaged in the research and application of shock wave and detonation physics, nuclear physics and plasma physics, computational physics, arms control physics, engineering mechanics, fluid mechanics, basic mathematics, applied mathematics, engineering design, manufacturing technology, radiochemistry, organic chemistry, polymer materials, energetic materials, nuclear materials, laser technology and application, pulse power technology and application, electronic technology, information technology, computer science and application, etc. It is the strongest research institution in the field of nuclear industry in China.

The molten salt nuclear reactor was originally one of the key research projects of the next generation of nuclear reactors of the China Academy of Engineering Physics, and Pang Xuelin's handing over the relevant technical solutions of the molten salt reactor to the China Academy of Engineering Physics will undoubtedly greatly accelerate the research and development of the molten salt nuclear reactor, and it is also of great significance for the construction of the electromagnetic catapult space launch system.