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Xu You didn't expect that before learning how to use a piece of equipment, he would have to learn the fault conditions first.

But since this is a device whose failure time is longer than the normal state time, it is also very necessary to understand various failure problems first.

"In fact, the main faults all occur on the vacuum system, which is also a kind of fault that is difficult to avoid for this kind of equipment. This kind of fault can usually be found out in one day, repaired in half a day, and then it takes a few days to bake. Bake, remove the gas, and reach the ideal vacuum environment, then you can continue to use it.”

"Of course, if there is a failure like a screw being broken, where there is water and air leakage, the time required for troubleshooting may be longer."

Listening to Cao Quanli's words, Xu You also understood the key points.

That is, when the ARPES equipment is normal, it is necessary to quickly do a few more sets of data.

To avoid equipment failure, time will be wasted in waiting for baking and degassing.

Through Cao Quanli's introduction, Xu You knew that Jida's ARPES device was considered to be a relatively advanced device of its kind.

This ARPES device can measure the energy of electrons by using the time of flight of electrons.

In this way, the detector can simultaneously measure the electronic information of the entire surface in the two-dimensional momentum space.

Compared with most energy spectrometers using one-dimensional momentum detection, the momentum detection efficiency has been improved by at least two orders of magnitude.

After learning how to use the equipment, Xu You started his own experiment.

First of all, Xu You needs to obtain various data such as crystal structure and energy band structure through the measurement of various high-temperature superconductors, so as to analyze their superconducting mechanism.

During the experiment, it was not as exaggerated as what Cao Quanli said, and the equipment was in a state of repair for a long time.

Of course, ARPES equipment is indeed still prone to failure.

Xu You devoted a lot of energy to equipment repairs.

However, Xu You didn't feel bothered by it.

After all, repairing the equipment itself is also part of the scientific research work.

When the equipment is in the baking state, Xu You can also sort out the data with peace of mind, study the crystal structure, energy band structure and other characteristics of various high-temperature superconductors, and summarize some laws from them.

Xu You himself still likes this state very much.

After a period of experiments, Xu You has completed the ARPES analysis of various high-temperature superconductors, and summed up some new experiences that have not been summarized by the predecessors.

Xu You was also the first to communicate with Qiao Sen.

"Teacher, even for the same Fermi surface, copper oxide high-temperature superconductors and iron-based superconductors may contain different orbital properties. There are such differences in their electronic structures."

Looking at Xu You's recent research results, Qiao Sen also nodded repeatedly.

Although there is still a long way to go to perfect the mechanism of high-temperature superconductors.

But at least one step has been taken toward explaining the mechanism of high-temperature superconductivity.

"That's right, this theory is already a breakthrough. How about it, how does it feel to do the project independently?"

"It's still very challenging. Especially the ARPES equipment, I feel like I'm already a professional repairman."

Hearing this, Qiao Sen couldn't help laughing out loud.

"No way, this kind of equipment is very delicate. But if you want to study this aspect, the ARPES experiment is also essential. Okay, you can continue. If you have any latest progress or encounter any problems, you can directly contact I."

To be honest, Qiao Sen didn't expect Xu You to make some breakthroughs so quickly.

If this momentum continues, even if Xu You can really figure out the mechanism of high-temperature superconductors, it is not impossible.

After these days of hard scientific research work, Xu You somewhat neglected relaxing activities.

The fatigue level of the system interface has accumulated close to the upper limit.

It happened that Lou Song asked Xu You to go to the ball, and Xu You agreed decisively.

Because of lack of exercise recently, Xu You's skills have not increased but decreased, but it was even worse when he was abused by Lou Song.

However, Xu You doesn't pay much attention to winning or losing. As long as he can achieve the purpose of relaxation through exercise, it is the greatest success.

After playing the ball, Lou Song took out a book from his schoolbag and handed it to Xu You mysteriously.

Xu You took a look and found that it was a periodical.

"This is...annual mathematics?"

Soon, Xu You recognized the origin of this journal.

The Annals of Mathematics is one of the four major journals in the field of mathematics.

For most mathematicians, it is very difficult to publish a paper in the four major journals.

Thinking of what Lou Song said before, Xu You probably guessed why Lou Song gave him such a journal.

"Have you published a paper on it?"

"Hey, just look at it and you'll know."

Seeing Lou Song's mysterious appearance, Xu You simply opened the journal by himself.

Sure enough, on a certain page of the journal, Xu You saw a paper from Ji Dasong.

"Awesome! You are only 16 years old, and you can publish papers in four major journals! Now you are not far from the Fields Medal, right?"

"I'm not as good as you. I'm also a freshman. How many papers have you published? I'm still far from winning the Fields Medal, but I will work hard in this direction."

At this time, Xu You was really happy for Lou Song.

Xu You carefully received the periodicals in the bag, and decided to go back and treasure them together with the few periodicals he sent.

"By the way, let me tell you something. I'm going to Princeton's Department of Mathematics for a year as a sophomore, and the procedures have been completed."

Hearing this news, Xu You was not too surprised.

"Very good, this is indeed a very good opportunity. Have you finished the TOEFL?"

"Well! I've been preparing for this, so I've already passed the exam."

"It's amazing. I just finished the fourth grade, and my English is too far behind yours."

Objectively speaking, in terms of mathematics, Princeton is indeed much stronger than Jida.

If there is such an opportunity, it will definitely not be easily missed.

"In my sophomore year, I won't be able to play with you anymore. But I will come back after a year, see you then!"

Xu You felt a little sad at the thought of being separated from Lou Song for a year.

"Well, wait for you to come back!"

For Lou Song to have the opportunity to go abroad for exchange for a year, Xu You is still very happy for Lou Song.

Although Xu You has no idea of ​​going abroad, Xu You also knows that compared with domestic universities, some foreign universities do have stronger strength.

It must be a good thing to have the opportunity to go out and communicate for a period of time while ensuring safety.