Volume 1: Student Life Chapter 353 This is the physical problem
Chen Zhou can be said to have certain experience in the optimal design of diodes.
After all, there is the accumulation of previous particle accelerator experiments.
But this experience is still very limited.
Because previous particle accelerator experiments used the experimental effects of different diodes to study intense pulsed particle beams.
It does not involve the optimal design of different diodes, or the optimal design of a specific type of diode.
Based on Chen Zhou's research experience in recent times, the optimal design of diodes is actually the principle and application of intense pulsed particle beams, a small topic within the larger topic and can be considered a subdivision of it.
Chen Zhou felt that this was also the reason why Dean Yang asked him to choose this as his graduation project.
If you have potential and accumulation, it won’t be too difficult.
Moreover, I can borrow it from Dean Yang at any time when I am in the laboratory.
Dean Yang had already made note of this.
Whenever Chen Zhou needs it, he can go to him at any time and he will arrange the laboratory matters.
Chen Zhou was still very pleased about this.
He always felt that he was tricked by Dean Yang.
The arrangement of the laboratory was Dean Yang's way of making up for his guilt.
After having lunch in the cafeteria, Chen Zhou returned to the library to continue his research on the optimal design of particle accelerator diodes.
The overall theoretical research process has been proceeding according to his plan.
If nothing goes wrong, Chen Zhou will be able to get the theoretical results of the optimization design done this afternoon.
Then I went to ask Dean Yang to borrow his laboratory and started the experimental verification phase.
When the experiment is over, the topic will basically be over.
Turning on the computer and opening the draft paper, Chen Zhou was not in a hurry to finish the experiment, but instead reorganized the previous research materials.
He wanted to see if there was anything that could be adjusted, or if there was anything he had overlooked.
In other words, does the optimized design of diodes have any deeper implications?
A thick stack of draft papers contains all the results of Chen Zhou's research over such a long period of time.
When the topic was determined, he also determined the research direction.
The first step is to simulate and calculate the field strength distribution of the cathode emitter with different diode structure configurations, and obtain a diode model with relatively uniform field strength on the cathode emission surface and moderate emission electric field strength.
The calculations here are done using a finite-difference time-domain particle simulation program that simulates plasma physics processes in two-dimensional space, namely MAGIC.
The electromagnetic field at any point in simulated space is obtained by solving Maxwell's equations.
In addition, using the complete Lorentz force equation, the trajectory of relativistic charged particles can be solved.
After the diode models are obtained, experimental research on particle accelerators is carried out by replacing the original diode structures with these diode models to obtain a diode structure with the best experimental results.
On this basis, scanning electron microscopy analysis and experiments on particle generation performance were carried out on several velvets, that is, cathodes containing velvet emitters.
The result was a diode with a suitable velvet cathode and the best experimental results, and the resulting particle beam current.
The overall idea, direction, and method are very simple, but Chen Zhou is obviously not the kind of person who is only willing to do simple projects.
During the research process, he used divergent thinking to hope to connect the content of previous particle accelerator experiments.
In general, whether it is a big topic or a small topic, there are no major technical difficulties.
It is more of a process of exploration, exploring the expected result.
Unlike many physics topics, it is necessary to focus on solving the technical difficulties of this topic during the research process.
Once the difficulties are overcome and the results come naturally, everything will go smoothly.
Just like the research on controlled nuclear fusion, the technical route and theoretical knowledge are not difficult.
In other words, under theoretical conditions, it is completely feasible .
The difficulty lies in how to solve the problem of magnetic field confinement of plasma, and what materials can cope with the high temperature of up to 3000℃ when the plasma disintegrates.
This is the technical difficulty in the research process, and it is also the difficulty that has long been unable to be overcome in controlled nuclear fusion.
While Chen Zhou was sorting out previous research materials, he recorded his thoughts on a new piece of draft paper.
These thoughts may not be related to this topic, but they are all things that Chen Zhou finds interesting.
It is like, is it possible to find a most suitable diode that can not only meet the needs of previous particle accelerator experiments, but also meet the needs of metal material surface modification, and even meet the needs of the current topic?
It was not until about 4:30 in the afternoon that Chen Zhou sorted out all the previous research materials from beginning to end.
At the same time, he also determined the diode model needed to pass particle accelerator experiments.
Looking at the three diode models on the draft paper, Chen Zhou's mouth corners slightly raised.
I picked up a pen and circled one of them.
That one was specially prepared for his graduation project. The other two were, on the one hand, for comparison with the circled one, and on the other hand, to verify Chen Zhou’s own interesting ideas.
"It's time to go and borrow the laboratory from Dean Yang. This thing is much simpler than the Jebov conjecture after all..."
Chen Zhou sighed as he packed his things.
What he didn't know was that if Dean Yang heard this, he would probably roll his eyes.
After all, in a sense, this topic can be considered a sub-item of a national-level topic.
This difficulty, will it be easy?
Unfortunately, Chen Zhou doesn’t think so.
He felt that perhaps only those physics problems that required solving difficult theoretical problems could be compared with the Jebov conjecture.
For example, can all dimensionless parameters that characterize the physical world be calculated in principle, or are there some that depend solely on history or quantum mechanical accidents and are therefore impossible to calculate?
This sentence may seem complicated, but to put it simply, did God have a choice when he created the universe?
Imagine God sitting at the control console, preparing to trigger the Big Bang. Did God think about these questions?
"What should I set the speed of light at?"
"How much charge should I give these tiny dots called electrons?"
"What value should I choose for Planck's constant?"
Or, did God just pick a few numbers at random because he was in a hurry?
Or do these numbers have to be that way because there is some logic behind them?
In Chen Zhou's opinion, this is the difficult problem, okay?
Studying such problems must be the most interesting thing.
This is the difficult problem of physics, and this is the fun of physics!
Looking at the draft paper in his hand that he was about to put into his backpack, Chen Zhou felt that it was not so fragrant anymore.
Of course, if Chen Zhou were to start such a project now, most people would probably think he was crazy...
He himself would probably become like Zhang Zhongyuan soon, and then he would really become what Zhang Zhongyuan said, "He has the demeanor of my youth!"
After packing up his things, Chen Zhou left the library and headed towards the administrative building of the School of Physics.
