"Ladies and gentlemen, the plane has landed smoothly at Chengdu Shuangliu International Airport. The outdoor temperature is 14 degrees. Please pay attention to safety when taking out items from the luggage rack. Please collect your checked luggage at the baggage claim area. Thank you for choosing China Airlines
Flight! See you on your next trip!”
Until the moment you step out of the plane door.
Huang Yuting's mood is still a little complicated.
The last time news that made her deeply aware of the impermanence of the world was the death of her father, Professor Huang Danian.
She was at the end of her semester at the time, and she originally planned to travel to Changbai Mountain with several classmates from school. The hotel and tickets had already been booked.
As a result, she learned that her father was critically ill more than four hours before leaving, and by the time she rushed back to Spring City, she was already separated from him.
And today.
She had a deeper understanding of the four words "impermanence of things in the world".
Twelve hours ago.
She was still feeling sad about Lin Chen's resignation, and worried about whether the project team could continue, fearing that the call on the other end of the phone would ring with a notice that the project team would be disbanded.
Result twelve hours later.
The location where she is standing has changed from Spring City to Chengcheng. At the same time, she will also go to the Xichang Satellite Launch Base to discuss the emergency research and development of a gravity gradient meter?
To know.
Although she did send a letter of intent to the Xichang Satellite Launch Base earlier, this letter of intent was not unique.
After the drawings were released, Huang Yuting's team sent the same documents to more than 40 aviation agencies, large and small, across the country.
Among all the sending targets, the Xichang Satellite Launch Base is actually not at the front, or even at the rear.
After all, the entire project needs to consider not only the problem of balancing the module, but also the problem of measuring the module - which involves research at the particle level.
Therefore, in Huang Yuting's opinion.
The institutions that are more likely to accept letters of intent should be those research groups in China that are engaged in ultra-low temperature cold atoms.
For example, the State Key Laboratory of Spectroscopy and Atomic and Molecular Physics, or the Shanghai Institute of Optics and Precision Mechanics, the Optical Lattice Project Team under the High Technology Research and Development Center of the Ministry of Science and Technology, etc.
Like her father, Professor Huang Danian, the institution he initially collaborated with was the Cold Atom Center of the Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences.
The result was unexpected...
The Xichang Satellite Launch Base actually adopted her structural drawings and said that the problem with the measurement module has been solved. Next, it is preparing to quickly develop a gravity gradiometer to excavate the "Yongle Dian" in Yongling?
This news is really progressive...
Magical.
To be honest.
As a pure science student, Huang Yuting actually didn't know much about Yongling and "Yongle Dadian".
She doesn't even know until now that the Yongling Tomb she randomly searched on Baidu in the waiting room was actually the Yongling Tomb of the Qing Dynasty. From the beginning to the end, there was only one piece of information that she really cared about:
Xichang is preparing to put this instrument on the market within seven days.
This sentence alone was enough for Huang Yuting to fly thousands of miles from Chuncheng to Chengcheng. In order to rush for time, she and Lin Chen didn't talk about first class or business class. Even the economy class they bought was 34C, which is an unusual economy class.
Need a narrower location.
Just when Huang Yuting was in a trance.
Lin Chen beside her suddenly pointed in a certain direction and said excitedly:
"Sister Huang, look over there!"
Huang Yuting finally came back to her senses and turned to look in the direction pointed by Lin Chen.
On the left side of the exit of the waiting hall, I saw someone holding a pick-up sign high, with a few words written in colorful fonts:
[Jilin University/?Huang Yuting?].
Huang Yuting was slightly startled when she saw this.
Since she has not produced any results over the years, she rarely attends meetings and has become a little unfamiliar with things like airport pick-ups.
However, this was not the right time to reflect on the fate of life, so Huang Yuting quickly waved her hand at Lin Chen and signaled:
"Come on, Xiaolin, let's go there."
After saying that, she picked up her suitcase and walked quickly towards the pick-up point with Lin Chen.
After walking a distance of more than 20 meters in a few steps, when Huang Yuting came to the front, a very young man reached out to her:
"Hello, Professor Huang, I am a member of the Xichang airport pick-up team. I come from the University of Science and Technology of China. My full name is Xu Yun. You can just call me Xiao Xu."
Huang Yuting subconsciously stretched out her hand to shake it.
Then her eyes stayed on Xu Yun's face for a while, and suddenly asked:
"University of Science and Technology of China...Xu Yun...Oh, I remember, you are the Dr. Xu at yesterday's press conference, right?"
Huang Yuting had not seen the press conference where Xu Yun was falsely accused, but she paid close attention to the dark matter press conference of the Academy of Sciences yesterday, and was deeply impressed by Xu Yun, a "surprise soldier from the sky."
Seeing this, Xu Yun smiled slightly, took the luggage from her hand naturally, and said with a smile:
"That's right, Professor Huang, that Xiao Xu at yesterday's press conference is me."
Huang Yuting said thoughtfully, and then she quickly realized something, and a trace of speculation flashed in her eyes:
"Wait a minute, Dr. Xu, could it be that the third-party institution that solved the computing module mentioned in the Xichang base's reply letter is your University of Science and Technology?"
Xu Yun nodded and said while leading the way:
"Yes, Professor Huang, to tell you the truth, the original purpose of the dark matter particle experiment was actually to optimize the accuracy of the gravity gradiometer measurement module."
"We took advantage of the 'blinking' characteristics of dark matter to optimize the sensing level to the order of 10^-16m/s2, and can keep it in real life for more than four hours..."
"etc!"
Before Xu Yun finished speaking, Huang Yuting interrupted him and asked with a surprised look:
"Dr. Xu, did I hear you correctly? What is the measurement accuracy you mentioned? 10^-16m/s2?"
Xu Yun nodded heavily.
Huang Yuting's childish expression suddenly shrank, and she subconsciously wanted to say something impossible.
Currently, the most publicly available gravity gradiometer in the world is the GOCE gravity gradiometer mounted on the ESA GOCE satellite.
Its sensing accuracy is 10^?12m/s2, which is one part per trillion of gravity acceleration accuracy.
This chapter is not over yet, please click on the next page to continue reading! And now according to what Xu Yun said.
The accuracy of HKUST’s measurement module this time is 10^-16m/s2, which is at least four orders of magnitude higher than that of the GOCE satellite!
True.
The GOCE satellite was launched in 2009, which is almost 14 years ago.
At the same time, as an important equipment in the current military field, the highest public accuracy may not be the real number one.
The gravity gradiometers used by some foreign countries in the military field should be more accurate, and the numbers must be highly confidential to the outside world.
But even with the most advanced gravity gradiometer, the theoretical accuracy should only fluctuate between 10^-13m/s2 and at most 10^-14m/s2.
Now the University of Science and Technology claims that their measurement module has reached an accuracy of 10^-16m/s2, which obviously challenges Huang Yuting's understanding.
But the problem is...
According to Xu Yun, the material used by HKUST is the flickering property of dark matter, which seems logically reasonable.
After all, it is the mysterious dark matter...
In addition, the University of Science and Technology has made a big splash with the Academy of Sciences press conference, and its image is much higher than before.
Therefore, Huang Yuting's doubts were suddenly stopped in her throat.
Then with this question in mind, Huang Yuting and Lin Chen followed Xu Yun to the parking lot.
After getting into the commercial car.
Xu Yun glanced at the time, thought for a moment, and suggested to Huang Yuting:
"Professor Huang, it's getting late now. If we want to go to the Xichang base, we can only take the expressway, which will take several hours."
"How about this? Let's find a hotel nearby for one night and then take the train tomorrow?"
There are not many flights from Chuncheng to Chengcheng. The flight Huang Yuting took was the first to land, but its arrival time was still close to ten o'clock in the evening.
Including the time it takes to pick up luggage and exit the station, it is already approaching 11pm, and it is obviously impossible to take the train.
Fortunately, both the Academy of Sciences and the Xichang Satellite Launch Base have contracted hotels near the airport or station, so there is no pressure to find a place to spend the night.
Unexpectedly, Huang Yuting shook her head firmly and said to Xu Yunt:
"Forget it about the hotel, Dr. Xu, let's take the highway to the base - by the way, Dr. Xu, if you feel like you can't hold on, Xiaolin and I can leave first..."
Xu Yun quickly waved his hand and quickly denied:
"Professor Huang, there's nothing wrong with me. It's normal for me to stay up late at my age. Picking me up at the airport is nothing."
"If you want to leave now...Master Wei, then let's go."
The Master Wei in Xu Yun's mouth is a middle-aged man in his early forties, named Wei Siming. He is a soldier who retired from further west. His hometown is Ludong Province. He looks reliable and capable.
Hear Xu Yun's instructions to set off.
Wei Siming said "ok" cheerfully and started the car.
The whole journey was silent.
.........
More than five hours passed.
Wei Siming's car arrived at the Xichang launch base safely.
After inspection.
Xu Yun first took Huang Yuting and Lin Chen to the guest house located in the Logistics Department. He helped them pack their luggage and put some food on them. Then Huang Yuting hurriedly pulled them to the laboratory.
Those who were classmates at the Xichang launch base in their previous lives should all know this.
The Xichang Satellite Launch Base mainly performs launch missions on weekdays. The commonly used research and development terminals are actually the Science and Technology Commission and the Space Administration, which are thousands of kilometers away from Xichang.
However, this does not mean that the base itself does not have R&D capabilities.
In fact, due to historical reasons, almost all third-tier official institutions have independent scientific research capabilities.
For example, Building 3 of the Xichang Launch Base.
On the second floor of this seemingly ordinary building with the same name as a kitten who has no moral integrity, there is a high-tech equipment that is completely different from its appearance:
Anti-vibration and anti-overload component modules, axial escape sensors, calorimeters, regulators, and a humming supercomputer.
There is even a small acid-base library on the third floor of the building.
According to Ge Tongyou’s previous introduction to Xu Yun.
In extreme cases.
This laboratory has the ability to assemble a temporary communications satellite in four hours and launch it into space in six hours.
When Xu Yun and Huang Yuting arrived on the second floor of the building, the laboratory seemed extremely busy, and there was no clue that it was already four o'clock in the morning:
"Prepare for position 1, prepare for position 1, and try to keep the inclination angle within 0.005° this time!"
"Attention Group B, Attention Group B, there is something wrong with your calculation, the right sides are not equal, please correct it again!"
"Didn't the experts who designed the structure say they are on the way? Why haven't they arrived yet?"
"Lao Ma, how long will it take for your program to be written?"
"It's quick, it's done now!"
"It's the last five minutes, can you make it?"
"Don't worry, boss. I usually write novels, and I'm stuck updating it in the last five minutes every day!"
Facing the somewhat noisy laboratory, even Xu Yun was slightly startled.
The busy employees in this laboratory are generally between thirty and fifty years old. They are not as "tragic" as the old academicians were.
But this chattering sound was indeed beyond Xu Yun's awareness.
The project R&D environments he has been exposed to are generally very quiet. After all, data needs to be recorded and analyzed. If it is too noisy, it will definitely affect efficiency.
Therefore, no matter how active most R&D teams are at the celebration party or outside the project, they are generally very quiet during the project.
The atmosphere when the project is in progress is usually similar to the background color of the Three-Body TV series, except that someone is playing the violin behind the scenes.
The result was unexpected.
These colleagues at the Xichang base are unique in that they turn the laboratory into a vegetable market, and each one's voice is louder than the last.
Just when Xu Yun and Huang Yuting were in a daze.
Ge Tongyou, who was on their right, happened to catch a glimpse of them.
I saw him whispering something to the members around him, and then quickly rushed to the two of them, first nodding to Xu Yun:
This chapter is not over yet, please click on the next page to continue reading! "Xiao Xu, you are back."
Then he looked at Huang Yuting again, with a trace of emotion on his face, and took the initiative:
"Little girl, are you Lao Huang's daughter?"
Huang Yuting had not heard anyone call her little girl for a long time, but this discomfort with the title was quickly dispelled by Ge Tongyou's follow-up word "Lao Huang".
She stared at Ge Tongyou and asked politely:
"You know my dad?"
Ge Tongyou nodded slightly:
"Let me introduce myself. My name is Ge Tongyou. I am an instrument balancer. I have worked with Lao Huang several times in the past."
"In addition, I served in the XX unit of the Navy a long time ago. The gravity gradient meter designed by Lao Huang in 2013 was installed on the ship of my old unit, and it was numbered XXXX."
Ge Tongyou reported the number of a ship, and Huang Yuting's eyes turned red instantly.
The ship reported by Ge Tongyou is equipped with the first gravity gradient meter designed and implemented by Professor Huang Danian in China, which will be in service for five years.
In the past five years, it has discovered a total of 48 latent equipment of various sizes in the eastern waters of my country, which is a great achievement.
In 2018, the ship's life span expired, and the measurement equipment at that time was much more accurate than in 2013, so the gravity gradiometer was retired along with the ship.
What is even more unforgettable for Huang Yuting is...
The gravity gradient meter was completed in the same month as her master's degree graduation.
At that time, Huang Danian specially applied for a formality and took Huang Yuting into the research and development center of the North Sea Fleet. Huang Yuting personally tightened the last screw.
Now hearing Ge Tongyou mention the number of the ship, Huang Yuting's mood fluctuated to some extent.
But soon.
Huang Yuting quickly wiped the corners of her eyes, sniffed twice, forced herself to return to normal, and said to Ge Tongyou:
"Professor Ge, let's not talk about sentimentality for now. Just tell me what I want to do now."
Ge Tongyou raised his eyelids and glanced at her, then nodded slightly:
"Okay, come with me."
Then he took Xu Yun and Huang Yuting for a few steps and soon arrived at a table in the southeast corner of the laboratory.
The area of this table is about two square meters. There is a screen embedded on the tabletop, and the structural diagram designed by Huang Yuting is clearly displayed on the screen.
After arriving at the table, Ge Tongyou pointed at the screen on the table and said:
"Xiao Huang, we simulated your structure through the existing algorithm and found two major problems."
Huang Yuting looked like she was all ears.
Ge Tongyou quickly raised a finger and said:
"The first question is that the structure you designed is somewhat special, and it is somewhat different from the existing general ideas and... Lao Huang's consistent style."
"According to your design, this gravity gradiometer should have 3 arms and 6 accelerometers. So, how can it be balanced in the electrostatic field?"
Hearing what Ge Tongyou said.
Chief engineer Li Hua, who had just arrived to inquire about a few people, also nodded.
Mentioned earlier.
The principle of the gravity gradiometer is actually very simple:
This thing is to place two accelerometers that measure acceleration at a certain distance, and use the difference between them to accurately deduce the gravity field.
This difference is what is called the "gradient" in a gravity gradiometer.
The measurement accuracy of the sensitive mass distance change on the accelerometer is required to be 60 nanometers in real time, which is about one thousandth of the diameter of a human hair.
This kind of precise control cannot be achieved mechanically, but relies on the electrostatic field generated by the instrument.
for example.
If you want to make a metal as thick as a hair change at the nanometer level, you definitely can't use mechanical tweezers to do it. You have to apply an electric field or a magnetic field to achieve such a tiny level.
But the problem is that most current gravity gradiometers only have two arms and four accelerometers, but the one designed by Huang Yuting has three arms and six accelerometers, which is equivalent to one more 'axis'.
This way.
The design of corresponding other modules is very difficult.
But on the other hand.
According to the calculations by Ge Tongyou et al.
Huang Yuting's design can structurally offset the vertical Fzz error, which is a common problem of almost all gravity gradiometers at present - at least in China.
This is also the reason why Xichang must have Huang Yuting herself present:
They wanted to adopt this design, but because they were non-experts, they didn't know how to optimize the structure.
"Static electric field..."
After listening to Ge Tongyou's question, Huang Yuting thought for a moment and asked solemnly:
"Professor Ge, is the electrostatic field you are talking about a three-dimensional numerical balance, or is it a classical electrostatic balance in the traditional sense?"
Ge Tongyou and Li Hua looked at each other and said quickly:
"Of course the three-dimensional numerical values are equivalent. After all, Pangea particles are not charged."
Huang Yuting frowned immediately.
This is a troublesome thing...
To know.
Huang Yuting and her project team sent a letter of intent for structural cooperation to the Xichang base as early as a month ago, but the results were actually made even earlier.
At that time, they did not know that Xu Yun had discovered dark matter, nor did they know that Xu Yun would use dark matter as a target in the measurement module.
All her designs are aimed at particles that need to be transported through conductors - such as ultra-cold chain rubidium atoms and so on.
Since these particles have to be transmitted through conductors, the classical equilibrium of three-digit numerical equivalence is very easy.
Based on Huang Yuting's design.
As long as the three arms pass through a relatively special angle, the electrostatic balance within the conductor can be completed under any circumstances.
Since the posture of the three arms was rather strange, somewhat resembling the character "上", Lin Chen even joked at the time that he could call their movements the forgiveness of the goddess of dawn.
This design can theoretically be applied to any particle, but what Huang Yuting could never have imagined was——
Pangu particles do not need to be channeled through conductors, they will flash out of thin air...
This was somewhat beyond Huang Yuting's expectations.
Even if this girl’s brain is so big that there is a hole above her neck, she won’t be able to think of this...
Then Lin Chen, who was next to Huang Yuting, thought for a while, raised his hand and asked:
"Um...Professor Huang, what if we replace the target particles of the measurement module with other substances?"
Hearing this, Ge Tongyou glanced at him and quickly shook his head:
"Then the measurement accuracy needs to be recalculated, and the entire difficulty is much more difficult than the equivalent electrostatic balance of three-dimensional values."
Lin Chen opened his mouth, but in the end he didn't speak.
really.
If the Pangu particle is returned to something else, it would be equivalent to giving up the most critical and advantageous link, and it would be much more difficult to deal with than it is now.
And just when everyone was frowning.
Xu Yun on the side suddenly spoke weakly:
"Um...guys, I have an idea. Can we add a crystal lattice as a relay?"
........
Note:
7.6K, it’s not too much to ask for a monthly pass, right?
