Chapter 411 [

"Principal Liu, I have just joined the Natural Science Foundation of China. You know that I have just graduated. This is my first job. I don't know anything about Chairman Yu's background, but he must have a strong background."

Fang Hong looked at Vice Principal Liu and said with a smile. After a moment of pause, he continued: "To tell you the truth, I was surprised to be her assistant. I was hand-picked and promoted by her within two days of joining the job. "

The mouth is full of nonsense, and he lies without blinking.

But what he said undoubtedly made Vice President Liu Beng think more about it. He couldn't help but secretly looked at Fang Hong, and found that this young man was really handsome. She's also a woman, and she's still a young girl, so she can't rule out sparks with this handsome guy in front of her.

At the end, Fang Hong said, "Principal Liu, do you have any other questions?"

Vice-principal Liu put away his thoughts, and shook his head. He didn't intend to ask any more questions. If he wanted to know, Fang Hong probably wouldn't answer. Forcing the question would make him feel embarrassed.

"Student Fang Hong, let's go too, please." Vice President Liu made a gesture of invitation. After all, Fang Hong came to the school as a staff member of the Natural Science Foundation, so the two turned towards Li Kang and Yu Qiu heading in their direction.

...

Two or three minutes later, Fang Hong and Vice President Liu entered a conference room, where Yu Qiu, Li Kang and others were in the room.

During the conversation just now, Yu Qiu told Li Kang and others that she is not an expert in specific scientific research, but this does not affect the support of the Natural Science Foundation of China for basic scientific research, and expressed that professional matters are left to professional people do it.

Fang Hong entered this conference room, and soon saw Yu Qiu, and he walked over slowly, and sat down next to her.

Vice President Liu sat down next to Li Kang and talked with him in private. Fang Hong couldn't hear the whispers between them, but Li Kang suddenly showed a look of surprise, although it disappeared quickly. But it was still captured by Fang Hong, and he had a high probability of guessing what they were talking about.

At the same time, the person speaking in the conference room at the moment is Ning Xingqing, a major in astrophysics from Xincheng University and an experimental physicist. He is talking about the laser interferometer.

"The laser interferometer equipment is quite sophisticated, but its principle is actually very simple." Ning Xingqing immediately drew a horizontal line segment on a blackboard in the meeting room, and then drew a horizontal and vertical line segment at the right end of the line segment. Line segment, and then draw a small line segment at the end and intersection of the two line segments to represent the lens.

Ning Xingqing pointed to the drawn picture and gestured: "First of all, this is a laser that emits a beam of laser light. This laser beam passes through a semi-mirror at a 45-degree angle. Because it is not fully reflected, half of the light will directly Passing through, another part of the light will be reflected at a 45-degree angle, so a laser beam will be split into two perpendicular beams."

At this time, Ning Xingqing pointed to the ends of the two vertical line segments and said: "Put two reflectors at the end positions to reflect the laser light back, and the two reflected laser beams will converge into one direction through this half mirror again, so Two laser beams create interference fringes."

Speaking of this, Ning Xingqing looked back at Fang Hong and the others and said: "Because light itself is also a kind of wave, just like water waves, if two waves are superimposed, the part where the two peaks or troughs meet will get Intensify, and the parts where the peaks and troughs meet cancel each other out, creating alternating light and dark stripes, which can be imagined as the water ripples created by two hands slapping the surface of a calm lake."

"The interference phenomenon is extremely sensitive. As long as there is a slight change in the position of the two laser beams, the relative position of the peak and the trough will change, so that the interference fringes will also change significantly, so this phenomenon can be used to for ultra-high-precision distance measurements."

Ning Xingqing once again turned his head and gestured to the line drawn on the blackboard, "To be specific, if the distance between the reflector and the light source changes a little bit, then the positions of the peaks and troughs of the reflected light will change. "

Ning Xingqing continued: "Because the two beams of light are perpendicular to each other, if the gravitational wave passes by, the vertical direction and the horizontal direction must be affected by the gravitational wave differently, then the distance changes will be different, and the different distance changes will make the two beams reconnect. The condensed lasers produce changes in the interference fringes, which can be used to determine whether gravitational waves are detected."

Speaking of this, Ning Xingqing finished explaining the principle, and basically introduced the working principle of the Laser Gravitational Wave Interferometer Observatory in a short and scientific way, and the explanation was very easy to understand.

At the end, Yu Qiu looked at Ning Xingqing and asked: "Professor Ning, I want to know whether the construction of the Laser Gravitational Wave Interferometry Observatory can be technically independent in China?"

Ning Xingqing nodded affirmatively: "There is no technical problem."

Obviously, the main problem is that no one has invested money in it. Spending so much money just to prove a prediction made by Einstein a hundred years ago is not worthwhile, so no one is interested at all.

On the one hand, this kind of scientific research project is far away from the general public, and it is difficult to get attention and understanding. At most, they will watch the project plan when it is announced. On the other hand, some leaders may not fully understand the importance and significance of it.

To put it bluntly, basic research is often not recognized.

At this time, Principal Li Kang, who was present at the meeting, said: "Ms. Yu, this scientific research project is extremely large-scale, and it will take at least hundreds of scientists and the cooperation of multiple parties to realize it. A team of hundreds of scientists may be a conservative estimate."

The implication is that Xincheng University's scientific research strength is not enough, and it must not be able to handle it. Li Kang did not trust this point.

Yu Qiu nodded and said: "For the plan of the Natural Science Foundation of China, we hope that Xinda University will lead the cooperation in terms of technology, and let you professionals do the work in terms of scientific research. We are mainly responsible for providing financial support. You responsible for making it happen.”

This remark lifted the spirits of Li Kang, Ning Xingqing and others present. Even if people from Fudan University in Qingbei came to this project, they would have to listen to Xinda.

Facing Li Kang and others who were older than her, Yu Qiu's speech and behavior always showed confidence and calmness, which also made everyone look at her with admiration, and the stereotypes in their hearts disappeared a lot.

Thinking about it, it is definitely not a vase role to be the leader of the Natural Science Foundation of China.

"Let me talk about the requirements of the Natural Science Foundation of China for this project. You may understand that there are some deviations." Yu Qiu looked around the participants and said in an orderly manner: "Our idea is not to create a ground-based laser interference detection similar to the LIGO of the people of Magnesia. Observatory, but the Space Gravitational Wave Detection Observatory."

As soon as this remark came out, everyone was stunned for a moment, and Ning Xingqing couldn't help but hurriedly said: "Ms. Yu, are you referring to a project similar to the LISA system?"

The so-called LISA system is a space laser interference gravitational wave detection project launched by European Space and the old American NASA in the 1990s, but the progress is extremely slow.

Yu Qiu sorted out what Fang Hong had explained to her in the car when she came, and then he said clearly: "We named this project the 'Sky Mirror' project, and it will be deployed at an altitude of about 100,000 kilometers above the earth's orbit. 3 identical satellites, these 3 satellites will form an equilateral triangle array with a side length of about 170,000 kilometers, so as to form a space gravitational wave observatory, carry out space detection of gravitational waves, and conduct research on the frontiers of astrophysics, cosmology and fundamental physics Research."

Everyone present in Ning Xingqing was shocked, this is definitely a big deal.

Before they could react, Yu Qiu immediately made a request that surprised them, and she said methodically: "The Natural Science Foundation of China has spent a huge amount of money to launch the 'Sky Mirror' project. Our requirement is to get it fully operational by early 2015."

Ning Xingqing said in astonishment: "The beginning of 2015? Ms. Yu, this is probably an impossible task. The Western LISA system was launched in the 1990s, and there has been almost no progress in the past 20 years. By the beginning of 2015 It can be put into full operation from scratch in just four years, which is almost impossible to do."

Yu Qiu immediately asked: "Is it technically impossible? Or theoretically impossible?"

...