"We did it! We did it!"

Liang Qu responded excitedly, with trembling and excitement in his voice: "Using the idea of ​​the permanent magnet stellarator that you proposed before, and under the influence of nonlinear optimization algorithms, through supercomputing we have calculated the external field coil and

The parameters of the magnet set were simulated and adjusted to optimize the preset objective function as much as possible."

"Then we used the analytical model and the simple elliptical stellarator to complete the verification of the FOCUS program, confirm and debug the modular coils of the improved stellarator from different angles, and repair the error field generated by the permanent magnet spiral coil...

..”

A series of explanations came out of Liang Qu's mouth quickly. Perhaps because he was too excited, the explanations at this time were a bit confusing. Fortunately, this was the most familiar field, and Xu Chuan could barely understand the other party's method.

However, for further confirmation, he asked Liang Qu for a planning document and read it carefully.

He was more concerned with how they did it than with the success itself.

As mentioned before, the overly complex coil system of the stellarator is a serious challenge restricting its development.

The complex structure will aggravate the loss and loss rate of high-temperature plasma inside the reactor chamber, causing serious neoclassical transport problems.

This is not only a problem for the stellarator to achieve controllable nuclear fusion technology, but also a major problem on the miniaturization route.

In order to find a suitable three-dimensional coil to achieve a carefully optimized plasma configuration, he previously built a permanent magnet stellarator. Experiments proved that this idea is effective. In subsequent fusion research, the Huaxing fusion device successfully reduced the

New classic transportation, and completed a simulated power generation.

But this is not enough, because as the size of the reactor shrinks, the neoclassical transport will increase, and they need to further find ways to reduce the loss of high-energy particles.

Quickly flipping through the documents in his hand, Xu Chuan had a look of surprise on his face, understanding what they were doing.

Based on the permanent magnet stellarator, the Institute of Energy Research uses supercomputing to calculate the required magnetic field perturbation using the magnetohydrodynamics (MHD) perturbation balance program GPEC based on the physical properties of the plasma that need to be controlled, and then uses FOCUS

Go straight to the search for a suitable RMP coil that can produce the target magnetic perturbation.

By using the gradient of the objective function and the Hessian matrix to guide the optimization process, the optimization speed and convergence performance of this approach are significantly improved.

In addition, they also designed a set of quasi-symmetrical configuration coils inside the magnet winding of the stellarator through the R.MP coil design method.

This can further enhance the advantages of the permanent magnet stellarator, improve the sensitivity analysis of the error field caused by the plasma deflection inside the chamber, achieve rapid and concise positioning, and then adjust it through the magnetic field.

I have to say, this is an ingenious method.

It perfectly cooperates with the modified modular permanent magnet unit of the permanent magnet stellarator to achieve local fine-tuning of the magnetic field inside the reactor chamber, which can keep the high-temperature plasma in the chamber on a stable line and avoid them

In the banana zone, there are massive losses in the collision zone, reducing the new classic transport of the stellarator.

In this way, the size of the permanent magnet stellarator can theoretically be further reduced!
Chapter completed!