On July 4th, Liu Boming, an astronaut of China Space Station, couldn't help feeling when he first left the cabin.
In the vast starry sky, astronauts stood on a huge mechanical arm and reflected the earth from a distance. With the camera in their hands, the once mysterious universe easily entered people's field of vision.
However, China people have never stopped exploring the sky overhead.
On August 22nd, 20 17, a special signal was captured at the 500-meter spherical radio telescope (FAST) base in Guizhou. After identification, this is a pulsar that has not been discovered and certified. This is the first pulsar discovered since the founding of Tian Yan.
Some people are jubilant, some people are more confident, and some people are silently thinking of someone.
This man is South Ren Dong, "the father of the 500-meter spherical radio telescope (FAST)".
At this point, he was dying.
1945, Nan was born in Liaoyuan, Jilin.
He is the second child in the family, and his father is an engineer in the local mining bureau. An intellectual's father, Nan, received a good education from an early age.
At school, South Ren Dong has always been among the best, and its super memory and unique problem-solving methods have left a deep impression on people.
Usually, other students only list one solution to a problem, while South Ren Dong always lists multiple solutions to a problem.
For him, learning is not a scripted lesson, but more like a treasure that can be explored infinitely, full of challenges and fun.
The nourishment of the black land in Northeast China has also created the innate freedom and romantic character of Nan.
He loves literature and painting. In his spare time, he likes watching stars best.
There is a dragon head mountain in Liaoyuan. South Ren Dong liked to go to the mountains to see the stars when she was in primary school. At that time, he always fantasized about what the stars he saw in the southern hemisphere looked like. After entering high school, "One Star a Month" magazine became his must-read publication.
Even in the third year of high school, he was a must-see and learned a lot of astronomical knowledge from books.
In the year of his college entrance examination, the United States built the world's largest Arecibo spherical radio telescope with a diameter of 305 meters, which shocked the world astronomical community.
Prior to this, Britain had Lovel radio telescope with a diameter of 76 meters, and Australia had Apex radio telescope with a diameter of 64 meters.
As a magic weapon for observing the sky in the third era of human astronomy, radio telescope can capture unknown cosmic information more accurately.
Xiao Nan Ren Dong couldn't help asking, when can China build one?
No one expected that many years later, he actually built a radio telescope with the largest caliber in the world for China.
Now, he is still a "prospective graduate" who is troubled by the admission notice.
That year, Nan was admitted to Tsinghua with an average score of 98.6 (full mark 100) and the first place in science in Jilin Province, but he was never happy.
Originally, Nan applied for the Department of Architecture in Tsinghua, and her final score was more than 50 points higher than that of the Department of Architecture, but she was transferred to the radio major. This is a great blow to South Ren Dong.
When his father found out, he gave him a lecture. "Wouldn't it be better to have one less architect and one more radio scientist in the country?"
In this way, under the arrangement of fate, Nan set foot on the south train and entered the radio major in Tsinghua.
1968165438+10, graduated from the south and was assigned to Jilin Tonghua wireless power plant.
He was assigned to the packaging workshop. After putting down the luggage, South Ren Dong went to the packaging workshop for a walk. After seeing the general operation of the workshop, he went directly to the factory director's office. The purpose is simple, change jobs.
For a person who likes to study new things and accept challenges since he was a child, South Ren Dong can't tolerate making packaging by himself.
After the argument, he was assigned to the radio assembly workshop as a "small metalworker". South Ren Dong is very happy this time, because he can learn all kinds of metal processing techniques here, which is enough to satisfy his overflowing desire for exploration.
Although South Ren Dong looks unreliable, he is meticulous in his work, smart, thoughtful and quick to learn. He quickly mastered the techniques of turning, milling, planing, grinding and drilling.
After learning metalworking, South Ren Dong "remembered" the techniques of other workshops, such as pliers, riveting, electricity and welding, and he wanted to learn everything. So whenever he is free, he always runs to other workshops.
1969, the factory received the task of developing portable small radios. As high flyers and a "celebrity" in the factory, Nan is the first person the leaders think of.
After discussion, the R&D team consists of four people. Nan Rendong has drawing skills and is responsible for the physical design of radio stations. After repeated calculation and deduction, he first designed the three-dimensional shape of the radio, and then gave the specific data of each part of the mold.
This is a tedious and meticulous job, but it was quickly completed by Nan's men.
After the mold design is completed, injection testing is needed. The director gave the R&D team a "vaccination" in advance. If at first he doesn't succeed, he will sum up his experience and try again.
But no one expected that the test passed in one time, thanks to the accurate design drawings drawn by Nan. Even the seven-level mold master is not as good as himself at the test site.
Nan Rendong made a name for himself. Later, all the molds designed and drawn by Nan Rendong can be produced directly without testing.
In the process of project research and development, the team encountered many difficulties, which were solved by Nan's skillful hands. This is all because of the "stealing teacher" in Nanren Dongping Rili.
In the end, the radio developed by Nan was named "Xiangyang" brand radio, which sold amazingly and became a national famous brand, and he also ushered in a turning point of fate.
1977 The national college entrance examination resumed, and the postgraduate examination was among them.
Nan didn't want to take the exam, but at the insistence of his wife Guo, he went to work to do research during the day and reviewed at night.
The following year, he was admitted to the Graduate School of China Academy of Sciences, majoring in astrophysics.
After successful graduation, South Ren Dong continued to study for a doctorate in astrophysics. With the deepening of astronomical research, South Ren Dong became more convinced that China needed to build its own radio telescope.
1967, the Englishman Bell discovered regular radio waves through a radio telescope. After studying with her tutor, she found that this is a new celestial body-pulsar, which caused a great sensation.
Bell's mentor won the Nobel Prize for this.
1974, Taylor and hoels discovered two binary systems orbiting each other through arecibo radio telescope, USA. After research, it is confirmed that they are a pair of "pulse binaries", which shocked the world again.
When there was no astronomical discovery in China, China astronomy gradually pulled away from the world.
Is it because China people are not smart enough? Or is it because we lack opportunity and luck?
Neither, just because we don't have a large-caliber radio telescope.
If a worker wants to do a good job, he must sharpen his tools first, which makes South Ren Dong regret it very much until he finds an opportunity to change the status quo.
1September 1993, the General Assembly of the International Radio Science Union was held in Japan. The meeting put forward a plan to organize all countries to build a new generation of large radio telescopes with super functions.
Nan Ren Dong was very excited when she learned about it. "We should seize this opportunity and actively participate."
If the project of building a large-scale radio telescope can be introduced into China, it will not only solve the embarrassment of the lack of large-caliber radio telescopes in China, but also promote the development of astronomy in China, killing two birds with one stone.
Just do it, Nan immediately wrote a "proposal for quick projects" and began to look for candidate sites.
In China, it is not easy to choose the most suitable venue.
South Ren Dong finally took aim at Guizhou, and in just over half a year, more than 300 eligible depressions were identified by remote sensing technology.
These depressions are remote, and cars can't get in at all, so they can only walk. South Ren Dong insists that every depression should be inspected and evaluated in person to avoid missing the best position.
As a result, Nan, who was over 50 years old, began to lead the team over mountains and mountains.
Reconnaissance of depressions is manual work, and mountain roads are difficult to walk. It is rainy in Guizhou, and liberation shoes, firewood knives and crutches are their common equipment. South Ren Dong is the oldest in the team. He often panted out his quick-acting rescue pills when he climbed to the top.
In the process of site selection, the team encountered heavy rain halfway, and Nan accidentally slipped down. Fortunately, several trees blocked him, and his life was not in danger.
Even though the road is difficult and the road ahead is long, South Ren Dong still stubbornly shuttles through the depressions in Guizhou until it meets Dawodang.
In a blink of an eye 12 years have passed, and South Ren Dong has worked hard like an old father, paying sweat and hard work.
Looking at his students and colleagues for many years, South Ren Dong silently made up his mind that FAST only allows success and does not allow failure.
However, in the summer of 2006, the international jury finally decided that the large-scale radio telescope was completed in Australia and South Africa, and China was unsuccessful.
Nan Ren Dong cried, but he didn't give up.
If others won't build it for us, then we'll build it ourselves.
In 2008, the FAST project was finally approved. That year, Nan was 63 years old.
Since then, I have been studying and building FAST, just like the "dragon" in the base.
However, not long after the project started, he encountered a big problem. The 500-meter-diameter radio telescope to be built depends on the flexible expansion and contraction of the cable net to adjust the reflecting surface, locate and track the signal.
But the fatigue resistance of the cable net is not enough, which means that the whole plan may fall short.
South Ren Dong immediately decided to start with the basic material experiment, from single strand to multi-strand whole rope, doing the experiment step by step, checking the problems layer by layer, failing, finding the reason and continuing.
In repeated failures, the steel wire was broken countless times, and everyone felt disheartened, but South Ren Dong always took pains to carefully observe the fracture mouth and location.
Finally, South Ren Dong found that the root of the fracture was the anchorage structure, so he improved the anchorage structure of cable products according to his requirements, developed a new structure, and solved the fatigue problem of cable net.
After more than two years, Nan has traveled all over the country, but he never wanted to give up.
20 13 12 3 1, Liang Helong and Nan climbed the beam fastest and ran happily like boys.
This is a moment exclusively for Nan Ren Dong. At this moment, all the hardships were replaced by excitement and excitement. At this time, South Ren Dong's health is getting worse and worse.
He will cough all the time, have difficulty breathing and have unbearable pain. ...
He was diagnosed with terminal lung cancer.
Three months after the first chemotherapy, he returned to the construction site in Guizhou because he knew that the base could not be separated from him.
On September 25th, 20 16, after 22 years, FAST was finally completed and put into use.
The 500-meter spherical radio telescope was finally built. It is called "500-meter spherical radio telescope (FAST)", which is the heavyweight of our country.
It is the largest single-aperture radio telescope in the world with the most sensitive rotation. After the arecibo radio telescope caliber, it was increased to 350 meters, but it could not be rotated. The diameter of the rotatable parabolic radio telescope built in Bonn is only 100 meter.
By any comparison, the "500-meter spherical radio telescope (FAST)" is the most advanced radio telescope in the world, which means that the development of astronomy in China will leap to the forefront of the world. It took us 22 years to build the first telescope in the world. Since then, China's astronomical research no longer needs to look at other people's glances.
At the completion ceremony, on the Dawodang base, thousands of people were boiling, and everyone was cheering for this exciting moment.
After the guests left, Nan Ren Dong stayed. He watched the stars in front of the FSAT observation system until late at night.
This is his last appearance at FSAT base.
September 20 17 15, Nan, who loved learning all her life and never gave up, was finally "defeated" by cancer. Until his death, he didn't know that the sky eye had tracked the pulsar.
South Ren Dong is naturally free and romantic, but he walked into the mountains with responsibility and ideals for more than ten years and spent 22 years on the project of "500-meter spherical radio telescope (FAST)". He really did it. He gave his life.
South Ren Dong is called "China genius", but he claims: I am not a genius, but an old tactical worker.
It is said that standing on the shoulders of giants can see farther. South Ren Dong built a high wall with his low but firm body, which gave more people a chance to look up at the stars.
When South Ren Dong left, a "Southern Ren Dongxing" appeared in the sky.
Going south, the "500-meter spherical radio telescope (FAST)" appeared on the land of China.
South Ren Dong has gone, but his spirit of loving research, persistent exploration and noble dedication has influenced a generation.
However, he left so early that we didn't have time to say "thank you".
Thank you! Nan Lao, you have worked hard. Have a nice trip.
. End.
Wen | Duo Er
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