Yanqi Lake in Beijing will light up the "brightest light" in the world!

Tech 2023-05-05 18:24:59 Source: Network

Beijing Daily Client | Reporter Liu Suya, Zeng Qi, Zhao YuhanBy the Yanqi Lake in Huairou,A "magnifying glass" shaped building,About 90 football fields in size.Successfully accelerated here on March 14thThe first electron beam of the device,To generate the "brightest light" in the worldAnother step forward!At Huairou Science City,The 'Great Power Weapon' is being completed

Beijing Daily Client | Reporter Liu Suya, Zeng Qi, Zhao Yuhan

By the Yanqi Lake in Huairou,

A "magnifying glass" shaped building,

About 90 football fields in size.

Successfully accelerated here on March 14th

The first electron beam of the device,

To generate the "brightest light" in the world

Another step forward!

At Huairou Science City,

The 'Great Power Weapon' is being completed.

Zhaoxia Yinghong Beijing Huairou Science City Large Science Facility (high-energy synchrotron radiation light source). Taken by Bu Xiangdong

The above building will be the first in China

High energy synchrotron radiation light source,

Will also be the brightest in the world

One of the fourth generation synchrotron radiation light sources.

For this beam of electrons,

A group of 'light seekers' have been waiting for about fifteen years!

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The 'Chaser of Light' who fills the gap

In the late 1940s, the scientific community found that when the high-energy electron beam cluster was forced on the annular synchrotron to make a cyclotron motion at a speed close to the speed of light, it would emit electromagnetic waves in the tangent direction, which is synchrotron radiation light. Like a super X-ray machine, people can use it to observe the microstructure of matter. As a result, countries around the world began the "competition" of building synchrotron radiation devices to build light sources. Researchers of particle physics in China have always believed that:We need to build a high-energy light source to fill the gap.

In 2008, Li Jingyi, deputy director of the high-energy synchrotron radiation radiation light source accelerator department of the Institute of particle physics, Chinese Academy of Sciences, and his colleagues began to demonstrate the necessity and feasibility of building high-energy synchrotron radiation light sources. After nearly 10 years of tackling key problems, they verified the feasibility of the technical path and completed the concept and engineering design of the device.The site selection for high-energy light sources was set at Beijing Huairou Science City.

In June 2019, the construction of high-energy synchrotron radiation light source broke ground and became the creed of every constructor. On the wall of the office of the members of the engineering command center, there is a zero level progress plan for engineering construction. The grand project is meticulously decomposed into 82 steps, becoming a "baton" for 52 subsystem personnel. Behind the steady progress of each time node is the busy figure of the participants who forget to sleep and eat.

High energy synchrotron radiation light source under construction. Pan Zhiwang Photography

Independent innovation gnaws down the "hard bone"

High energy synchrotron radiation light source,

At the beginning of construction, a foundation construction indicator made builders exclaim 'impossible'The goal of anti micro vibration control should be less than 25 nanometers, that is, to achieve "zero settlement" of the structure. Nano, a unit that has never appeared in building codes, is an important guarantee for the accuracy of future light source experiments. The device construction team repeatedly experimented,After countless failures in four months, the answer was finally obtainedThey replaced the foundation of the light storage ring tunnel and the experimental hall with plain concrete with a thickness of up to 3 meters, ensuring that the light source foundation is stable as a rock.

The "little guy" inside the big device is also facing many difficulties.

The light source linear accelerator is the source of electrons and the first stage accelerator. The electron beam needs to be accelerated to a high energy of 0.5 gigahertz through it. One of the key components is the microwave power source that provides energy, which needs to be paired with an "upgraded" solid-state modulator. However, only one enterprise in the world has a mature product and the price is very expensive.

We have made up our minds to develop it ourselves, "Li Jingyi said firmly. The team members delved back and forth for 3 years, iterated 6 versions, and achieved the design targets. Finally, when the solid-state modulator was "in place" at the light source site, each test data item bounced on the screen, all reaching the "full score" standard. This is a generational leap!

Looking forward to the world's "brightest light"

After nearly 4 years of construction, three main buildings have grown on the once barren grassland, and the largest circular building is the core of the light source. During the construction process, "Beijing, Huairou District, and Huairou Science City have provided all-round protection and protection, connecting the 'lifeline' of the 'great country's important weapons'," said Li Jingyi.

The winter of 2022 is the first winter when the main building of the light source is capped and scientific research equipment is installed. Due to the fact that the collimation accuracy of scientific research equipment is generally on the order of 10 micrometers, slight changes in environmental temperature can lead to a decrease in the collimation accuracy of the equipment. Taking the storage ring as an example, its ambient temperature must be maintained within the range of plus or minus 0.1 degrees Celsius to ensure the positioning accuracy of magnets and other equipment. Faced with such strict demands, Huairou District quickly coordinated and promptly solved problems such as water, electricity, and heating in the light source installation area

In March this year, the high-energy synchrotron radiation light source linear accelerator "full energy" beam, the first to usher in a "good start", every second there are 10 billion level electrons "shooting" from the electron gun, of which about 90% of the electrons can successfully reach the end, to ensure that the terminal charge reaches the rated 2.5 nano library (1 micro library=1000 nano library) or more. This' great power weapon 'is taking another step towards producing the world's brightest synchrotron light.It is expected that the high-energy synchrotron radiation light source will be completed and put into operation in 2025.

High energy synchrotron radiation light source linear accelerator successfully emits beam at full energy

Now, the installation of the storage ring, the "circular acceleration track" with the largest light source, is underway. After the light source is put into operation, the electron beam in the storage ring will generate high brightness synchronous light during the running process,Help researchers' illuminate 'experimental samples and better analyze the microstructure and evolution of substances.

A wall away from the storage ring is the futureAn experimental station for users to conduct scientific experiments,From aircraft engines to viral proteins, we can "check up" here.

Basic research is the cornerstone of technological development, and we look forward to the first beam of light from the light source coming soon! "Said Li Jingyi.

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