With the breakthrough of the plasma control system, the Jinwu project has overcome many obstacles and the most core difficulty has been overcome. It is nearing the end and the progress is gratifying.
Wu Tong received progress reports one by one. Part of the reserves for superconducting material preparation had been made, the site for the first wall material had been selected, the equipment was in place, and adjustments had been made. The water-cooled divertor was the section that Wu Tong was going to personally work on.
However, at the first group discussion meeting, Academician Wan had good research results in this field, so this part of the separation research and development was handed over to Academician Wan to lead the team to overcome it.
After returning from the southwest, Academician He took over the supervision and follow-up work of Academician Wan, allowing Academician Wan to free up his energy to personally lead the team and conduct in-depth research and development in this area. At present, good news has also been received. Initial progress in research and development has made a breakthrough. It is expected to install a divertor inside the reactor. The initial simple drawings have been produced and sent to Wu Tong!
"Mr. Wu, this is a newly designed design based on our modified Tomasco water-cooling system! By gradually increasing the H&CD power, the EAST Dongfang Ring can generate ITER-style long-pulse H-mode plasma with a divertor heat load exceeding 10 MW·m⁻² under steady-state conditions."
Therefore, graphite PFC with a heat removal capacity of 2 MW·m-2 cannot meet the physical requirements.
Furthermore, ITER's PFC has transitioned from a carbon/beryllium (C/Be) structure to an all-metal wall with a tungsten (W) divertor target. To investigate the performance of all-metal plasmas, we employed an all-tungsten divertor at EAST, which has a heat flux handling capacity of up to 10 MW·m⁻². Both theoretical and experimental data demonstrate promising performance, and we are carefully exploring this potential.
Whenever Academician Wan opens his mouth, he reports on complex data parameters. He is talking to Mr. Wu, not to his superiors, so he has no restrictions and only reports the core content. Mr. Wu is the core soul of their project, and these are all basic reserve knowledge for Mr. Wu, so there is no need to worry that Mr. Wu won't understand!
"To provide valuable experience for ITER before its operation, similar materials, structures and technologies were first used for EAST. ITER-grade tungsten was used in the PFC, but combining tungsten with CuCrZr was difficult due to the mismatch in thermal expansion coefficient and Young's modulus.
After several experiments, we ultimately determined that the fabrication of a tungsten modular PFC involves two steps: first, hot isostatic pressing (HIP) is used to clad the tungsten module and connect it to a pure copper interlayer; then, hot radial pressure welding (HRP) is used to weld the tungsten module to the CuCrZr tube. Brazing and electron beam welding are then used in a vacuum environment to seal the pure copper tube and the tungsten module, followed by HIP processing.
Academician Wan, with both words and gestures, recounted to Wu Tong their journey in developing the water-cooled divertor. He scoffed, "ITER is so expensive, so his old friend, the Dongfang Ring, is the test piece." Honestly, he'd been quite resentful and suppressed his anger. But there was nothing he could do; the current situation wouldn't allow him to be willful!
But, hehe... now it's different. They have President Wu, and their stellarator device has seen the dawn of light. Those obstacles that have blocked the world's progress have been transformed into real breakthroughs in President Wu's hands, laying the foundation for their solid and stable steps in the field of controlled nuclear fusion!
Academician Wan couldn't help but feel happy and excited just thinking about it! With this state of mind, his research and development seemed to be going more smoothly. The initial progress he made so quickly was beyond his expectations and made him very happy!
"The bond quality between tungsten and copper is excellent, with a bond strength exceeding 150 MPa. Ultrasonic non-destructive testing (NDL) results show that the bond between the tungsten and copper blocks meets technical requirements. Fatigue resistance tests and overheating tolerance tests also show excellent potential!"
Hehe, this time they're going to use this technology for their own Golden Crow first, and let the international community just brush it off! They already have the Golden Crow, so they won't be greedy for the pitiful and sophisticated technology of the international community! So what if they're just crossing the river and then destroying the bridge? They're just being taken advantage of, greedily demanding endless funding!
"Combining tungsten and copper? This is an interesting idea. Academician Wan, please allow me two days to deduce it!" Wu Tong listened carefully to the various parameter data reported by Academician Wan. In his hand was the breakthrough data prepared by the team led by Academician Wan. It can be said that what was condensed in it was the essence of the country's persistent progress in controlled nuclear fusion over the past two or three decades.
It was only with a core leader like Academician Wan at their helm that they were able to so perfectly inherit this technology and even transfer it to further research and development of the stellarator device. Even with her authority, the core information she could access was nowhere near as clear and thorough as the database expert like Academician Wan's.
With Academician Wan's detailed summary of ideas and experience, she was confident she could come up with an optimization plan in a short period of time. It just so happened that she had some free time right now, so she could focus her attention on it.
"That's what I've been waiting for, Mr. Wu. I'll be waiting for good news from you!" Academician Wan smiled with satisfaction and handed the information to Wu Tong. Ever since he learned of Wu Tong's unique talent for optimization, he'd been dreaming of this opportunity. Their research and development in this field had reached a certain ceiling, and there was currently no better way to break through.
He had been thinking about asking Mr. Wu to offer them new R&D perspectives since learning that Wu Tong's development of the WS-15S aircraft engine had begun with optimization. Therefore, upon Academician He's return from Southwest China, he handed over the reins to Mr. He and led the team to fully invest in R&D, transferring the relatively complete divertor system on the Dongfang Ring to specifications suitable for the Jinwu Project.
"I'll do my best, Academician Wan!" Wu Tong laughed. She wasn't the all-powerful Doraemon with a magic pocket. Before the results were fully in, Wu Tong couldn't guarantee anything. "Everything still depends on the results!"
The final result is the most reliable. It is clear at a glance whether it can be used or not, and whether it is successful or not!
Of course, Wu Tong is quite confident that this plan can be optimized. Otherwise, he would not give a specific waiting time. This is a rare promise made by Wu Tong.
"Haha... I absolutely believe in Mr. Wu!" Academician Wan shouted and left with a smile and expectation.
After seeing Academician Wan off, Wu Tong returned to his office and started writing. He pulled out a piece of draft paper, and strings of deductive formulas and lines of deductive formulas bloomed like flowers on the paper. He transformed Wu Tong's brainstorming into mathematics, materials, and engineering language, and expressed it in these lines of deductive formulas. A new breakthrough was right in front of him!
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