Chapter 1382 Oddly symmetrical positioning
In order to implement this ground closed-loop nuclear magnetic fluid power generation verification plan, Factory 504 deployed a server with very powerful performance in advance.
As a result, the formal engineering renovation has not yet begun, and the equipment has been used first...
A little later that day.
As Chang Haonan's fingers quickly tapped on the keyboard, the three-dimensional magnetic field model simulated on the screen is constantly distorted and reorganized as the parameters are adjusted.
Of course, the magnetic wire does not really exist, but even the professional researchers have to admit that this thing is simple and intuitive.
Located in the control room next door, the young engineer held his breath and watched the red alarm sign flash repeatedly at a critical value.
"Reduce the current of the fifth and eighth groups of coils to 85% of the rated value."
Chang Haonan suddenly spoke, his eyes still locking the magnetic footprint diagram presented on the screen. .
The operator immediately executed the instructions. The originally restless magnetic field waveform slightly flattened, but the dark red abnormal area was still looming at the edge of the disc power generation channel.
"Reducing the magnetic induction intensity will alleviate the disorder of the magnetic field topology...but this is the obvious part, and nothing has changed in essence..."
He shook his head to himself.
The atmosphere in the room fell into silence again.
Han Chenfeng walked in from the door at this time, holding a laptop in his hand: "Academician Chang, I re-checked the coil assembly parameters and found that the yoke frame exists Assembly error of about 10 microns. ”
He said and called out two sets of comparison data: "When designing before, I considered that the impact on the static magnetic field could be ignored, but if it is simulated according to dynamic disturbances, then this asymmetry will Amplified by resonance… about two to three orders of magnitude.”
Although I didn’t continue, the meaning was already very obvious.
However, Chang Haonan shook his head decisively: "Not to mention the cost and tolerance problems caused by further improving installation accuracy, just two to three orders of magnitude amplification It sounds scary, but actually in terms of magnetic field position and shape accuracy, it is less than one ten thousand, which will not be the fundamental cause of the disorder of the magnetic field topology structure."
If you want to say that things like electromagnetic devices are precise, they are indeed precise.
But this precision is often not reflected in mechanical precision visible to the naked eye.
For example, the International Thermal Nuclear Fusion Experimental Reactor (ITER) that has just been launched recently, the allowable errors during permanent magnet installation are even sub-millimeters or even millimeters, and there will be no obvious interference.
The exaggerated change in the magnetic field structure in front of me must be the fault of the electromagnetic conversion process itself.
"Academician Chang!"
At this time, the laboratory door was pushed open suddenly, and Peng Juexian walked in with a work clothes stained with oil:
"The resonance disturbance spectrum and Poincalais you want have come out, and I By the way, the harmonic interference of the factory backup power supply was also checked, which had no correlation with the magnetic field disturbance frequency. "
Chang Haonan did not care at all about the latter news.
The harmonic interference of irrelevant power supplies can almost be regarded as a metaphysical concept, which is equivalent to the source of electricity affecting the sound quality of the headphones. The reason why Peng Jue first checked it is that he has come to hold it anyway. Is there any date? Just the idea of hitting three poles.
The key is still the first half.
"Open the resonance disturbance spectrum first!" Chang Haonan ordered in the direction of the control room next door.
Soon, an energy map with blue and green intersecting and slightly similar structure to an alien face appeared on the big screen.
"..."
He glanced at the system interface that was still calling the alarm, and suddenly reached out and pressed the emergency brake button.
As the low buzzing sound gradually weakened, a row of alarm lights on the system interface also went out or turned green one after another.
This action made Peng Jue's eyelids twitch: "Academician Chang, a sudden interruption of plasma flow will cause." "
"It will lead to an iridium alloy worth 8 million. I know the electrode was damaged."
Chang Haonan said with a plain face:
"But the cost is more controllable than letting the random layer expand to destroy the cavity itself."
Immediately afterwards, he pointed at the dark blue patches on the left and right corners of the screen:
"See? The area with the Chirikov factor exceeding 0.8 has already occupied 17% of the channel cross-section."
Now, not only Peng Juexian, but also Han Chenfeng, who was a little behind, was the same as Han Chenfeng, who was a little behind. Shocked: "Huh?"
The Chirikov factor is not a data displayed directly on the image, but requires a little secondary processing.
The "a little" here is for computers. It is still a bit exaggerated to rely on the human brain to make judgments in such a short time. As a reminder, Chang Haonan really failed to notice this problem as soon as possible. But this matter cannot be explained in detail, so he quickly returned to the topic just now:
"You see, the most intense part of the disturbance spectral type just coincides with the equilibrium magnetic surface, and from the theory In the above, strong resonance means that a greater radial disturbance will be received on the resonant magnetic surface, resulting in an increase in the width of the magnetic island, thereby producing a larger Chirikov factor, and the width of the random layer will also be larger..."< br>
Sure enough, everyone's attention followed him and turned his attention to the screen again.
But Chang Haonan's speech just now was very fast, and the description was a bit abrupt, and no one could react for a while.
Only Peng Juexian came back a little: "It means... the magnetic line can connect the target plate of the upper outer filter and the plasma area, causing a large number of particles to directly bombard the upper filter and the upper filter and the , trigger an alarm? ”
This is still a description of the phenomenon, not a root cause analysis.
Fortunately, the equipment has been suspended, so there is no need to worry about this moment.
"Now, bring up the Poincaré diagram of the magnetic field topology, I guess some magnetic island chains should be found relatively close to the plasma core, and near the X point of the boundary, a stable formation will be formed The strip-shaped epitaxial structure that intersects with the non-stable manifold... may be similar to a flattened hexagram."
At this point, Chang Haonan smiled and turned his head, half-jokingly said:
"Does anyone want to make a bet?"
In fact, everyone is still skeptical about his description.
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But you have to say that you can stand up and make a bet.
No one answered.
Not to talk about gambling for now.
If you lose, wouldn’t it be embarrassing?
And if you win, will the leader be embarrassed and can you still have good results?
In order to avoid the discontinuation, the operator sitting outside the door quickly transferred out the Poincalaitu that Chang Haonan asked for.
"Oh~"
A low scream suddenly sounded in the crowd.
The lines presented on the picture are almost exactly the same as what Chang Haonan said.
Although due to the setting of the axis, the overall figure is so flat that it is a bit abstract.
But the six sharp corners that are clearly protruding can still be seen.
Chang Haonan grabbed the laser pen on the table, drew a few sharp lines on the screen, and looked at Han Chenfeng: "Old Han, the design plan you proposed before , is it a theoretical prediction based on equilibrium formant? ”
“Yes, mirror symmetry through adjacent magnetic islands…”
The latter suddenly stopped halfway through his words, and his pupils contracted slightly: "Wait..." He took the laser pen and circled several key points on the topology diagram:
"It seems like it is reversed... When the magnetic surface rotation angle forms a rational number relationship with the disturbance frequency, the even symmetric arrangement that should have been suppressed in the expansion of the random layer may be due to the coherence of the position of the normalized magnetic flux. Lead to stronger resonance? ”
"It should be."
Although Chang Haonan gave a positive answer, the expression on his face did not relax, and he was obviously still considering longer-term issues.
Han Chenfeng has already thought of a new solution:
"Then, if the current phase of the upper and lower active control coils is controlled at 180°, an oddly symmetrical coil can be obtained. Isn't the distortion of the magnetic field topology that can be greatly weakened? "
Chang Haonan's temple thundered and did not answer immediately, but just re-recorded the video of the alarm just now on the computer monitor.
I saw crystal indigo blue fluorescence appearing on the inner wall of the disc generator.
This is a sign that ionic liquid penetrates into the weak zone of magnetic constraint.
After thinking for a long time, Chang Haonan nodded and agreed to the plan proposed by the other party: "At this stage... we can improve first as Lao Han said."
Han Chenfeng's expression was happy at first, but his expression quickly solidified on his face.
Since it is said that "at this stage", it means that there will be major changes in the future.
Chang Haonan also quickly explained: "In the simulation stage, as long as the apparent topology of the magnetic field can be maintained stable, if it really doesn't work, it can be shut down and restarted, and it will not delay the necessary operating parameters and acquisition... But if The problem of magnetic surface instability cannot be fundamentally solved. If you only change the coil shape, it is equivalent to using precious ionizing seed consumption for temporary smooth operation. "
" And it must also be considered, the true closed loop The nuclear magnetic fluid power generation system does not have one or two circuits. Even if the cost is not considered, it is impossible to open the lid of the nuclear reactor and add ionization seeds to it, so this is unacceptable for practical applications..."
(This chapter ends)