'Splinter neutron source' is a tool that uses neutron scattering to understand the microcosm, so it is vividly called 'super microscope' and is a 'national instrument' for studying the microstructure of matter.
According to Chen Hesheng, academician of the Chinese Academy of Spallation Neutron Source Engineering and an academician of the Chinese Academy of Sciences, many people use optical microscopes to observe cells and bacteria that are not directly visible to the naked eye, and the neutron detection world is more microscopic, using neutron photography methods. It is able to observe how a drop of water is transported from the root of a plant to the foliage. This can be used to treat cancer, detect the safety of aircraft high-speed rails, etc.
However, it is not easy to produce neutrons, which are smaller than atoms. According to Chen Hesheng, it is necessary to accelerate protons to 1.6 billion electron volts, which is equivalent to 0.9 times the speed of light. Use proton beams as 'bullets' to bombard atoms. After a very heavy metal target with a very high coefficient, the nuclei of the metal target are impacted by protons and neutrons, so that scientists can collect 'neutrons' through special devices.
In this process, proton acceleration is a major core technology, and the key to accelerating protons to 1.6 billion electron volts lies in a system called a radio frequency power source. The latter is therefore called the 'power microscope' of the 'super microscope'. When the Chinese spallation neutron source passed the acceptance, nearly 50 sets of power source equipment provided by China Aerospace Science and Industry Institute No. 23 also reached the acceptance index.
In fact, because many key equipments in RF power source systems have no domestic precedents and the reliability requirements are very high, many manufacturers have been deterred or turned away in recent years. Fu Shinian, manager of Chinese spallation neutron source accelerator department, said that 23 of the Second Institute of Science and Industry is the only key equipment supplier from the beginning to the end of the spallation neutron source project. It has 80% of the hard bones in the accelerator.
At that time, he was the head of RF power system engineering technology, and Xiao Haichao, head of the asset management department of the Second Institute of Aerospace Science and Industry, stated that the researchers of the 23 subordinate Guangtong have spent the entire 10 years to win the entire RF power source system. The first domestic high-power tetrode power source with 200MHz and above, the first digital low-level system used in the accelerator system in China - these are 'filling in the blank'.
Among them, the research team led by Wang Zhiyu, head of the low-level system, started from almost a blank sheet and completed the first digital high-frequency low-level control system for accelerator devices in China. All-digital, all-analogue, digital-analog hybrid and other series of low-level product lines, the first in the country.
Not only that, the entire 'Power Heart' team is still 'running' with the international.
Taking the high-frequency power source project of the 325 MHz tube as an example, the project leader Jiang Yong said that the core indicators required by this project are all higher than those of foreign power sources of the same type, and even foreign laboratories and foreign manufacturers are not similar. Experience, 'It can be said that crossing this ridge is the world's leader'. The entire product was developed in the Institute for 3 years, and the finished product with the accelerator was debugged for 4 years.
On the day of acceptance of the spallation neutron source in China, Chen Hesheng mentioned that the localization rate of the entire equipment exceeded 90%, which significantly improved China’s industrial technology level and independent innovation capabilities in the fields of magnets, power supplies, detectors, and electronics. China has achieved a major leap in the field of high-current proton accelerators and neutron scattering, and its technology and comprehensive performance have entered the ranks of similar international devices.