Chen Hesheng

Chen Hesheng

Chen Hesheng, born in August 1946 in Wuhan, Hubei Province, born in Fuzhou, Fujian Province, is a particle physicist, researcher of Institute of high energy physics, Chinese Academy of Sciences and academician of Chinese Academy of Sciences. Mainly engaged in high energy experimental physics research.

He graduated from the Department of Technical Physics of Peking University in 1970 and was sent to the German electron synchrotron center in Hamburg, Germany in April 1979 to work in the mark-j experimental group of Professor Ding Zhaozhong. In 1984, he received a doctor's degree from Massachusetts Institute of technology. In November of the same year, he returned to China and worked as a postdoctoral fellow in the Institute of high energy physics, Chinese Academy of Sciences. In 1992, he was promoted to research fellow of Institute of high energy physics. He was appointed director of Institute of high energy physics, Chinese Academy of Sciences in 1998 and elected academician of Chinese Academy of Sciences in 2005. In May 2017, it won the National Innovation Competition Award.

Chen Hesheng is mainly engaged in the research of high energy experimental physics.

Character experience

Chen Hesheng was born in August 1946 in Wuhan, Hubei Province. He graduated from Department of Technical Physics of Peking University in March 1970.

In May 1984, he obtained his Ph.D. in physics from Massachusetts Institute of technology. From June to November, he worked as a doctor in MIT. In November, Chen Hesheng, who has been a postdoctoral researcher at MIT for half a year, returned to China, determined to contribute to the development of high energy physics in China. He is a postdoctoral fellow in Institute of high energy physics, Chinese Academy of Sciences. The Institute of theoretical physics and Institute of high energy physics of the Chinese Academy of Sciences took the lead in the pilot project of postdoctoral mobile station in China and achieved success. Chen Hesheng became the first postdoctoral researcher in China.

Since 1984, the Chinese Academy of Sciences has been experimenting with postdoctoral research. In the project team led by Mr. Tang Xiaowei, Chen Hesheng has really started from the front line work and accumulated experience in various aspects.

In September 1984, Deng Xiaoping met with Professor Ding Zhaozhong in Beidaihe. Professor Ding talked about the post doctoral arrangement of mark-j's experimental training to the Institute of high energy. "Professor Ding Zhaozhong is very supportive of Chen Hesheng's work in Beijing. He has provided a micro vaxii computer, which is equivalent to 60% of the capacity of vax785, the largest computer in the Institute of high energy physics at that time. This enables Chen Hesheng to carry out Monte Carlo simulation of L3 experiment in the Institute of high energy and design and optimize the detector, which is of great help to Chen Hesheng's work in Beijing."

In 1988, Chen Hesheng and his colleagues celebrated the success of the BEPC collision, witnessing that China finally had the most advanced "weapon" for studying the micro world of matter, and became one of the eight accelerator centers in the world. This is regarded as an important milestone in the history of China's scientific and technological development.

In 1992, he was promoted to research fellow of Institute of high energy physics. Mainly engaged in high energy experimental physics research. In the mark-j experiment, we systematically developed the calibration method of shower counter, improved the position and energy resolution, thus improved the accuracy of energy flow measurement, and contributed to the discovery of three injection cases.

In 1998, Chen Hesheng was the director of the Institute of high energy physics of the Chinese Academy of Sciences. At this time, the Chinese Academy of Sciences implemented the knowledge innovation project, focused on optimizing the team structure, took the lead in implementing the whole staff employment system in China, and implemented a relatively flexible project employment system for postdoctoral researchers. The postdoctoral system is a supplement to the employment system, and "staff on the staff + Floating Personnel" has become a new employment mechanism of the whole hospital. Postdoctoral researchers have become the main body of the mobile team of science and technology, and also become the "reservoir" of the "selection and employment" of the unit. The team's innovation vitality has been significantly enhanced.

In April 2004, significant progress was made in the installation and commissioning of the first phase of BEPCII. At 16:41 on November 19, 2004, the electron beam signal at the exit of the linac was clearly obtained on the oscilloscope in the control room of the linac. It is estimated that the current intensity is more than 2A. The acquisition of this signal marks an important stage achievement in the improvement of BEPCII linac. The performance of Beijing electron positron collider will be three to seven times that of the same kind of device in the United States, which is of great significance for basic scientific research such as the study of quark particles 100 million times smaller than the nucleus.

In November 2005, he was elected academician of the Chinese Academy of Sciences.

Main achievements

Achievements in scientific research

Chen Hesheng is mainly engaged in the research of high energy experimental physics. In the mark-j experiment, we systematically developed the calibration method of shower counter, improved the position and energy resolution, thus improved the accuracy of energy flow measurement, and contributed to the discovery of three injection cases. He participated in the formulation of experimental physics scheme and detector design of CERN L3, was responsible for the reconstruction of hyperhadron quantizer package, and carried out the work of physical result analysis, standard model verification on L3, determination of electric weak parameters and neutrino algebra. As the technical director of the development of large permanent magnet system of alpha magnetic spectrometer, he led and coordinated the work of the cooperation group, and made important contributions to the overall scheme of the system, the application of high energy physics Monte Carlo method in the design, optimization of the detector and space environment simulation test. Presided over the BEPC II scheme design, feasibility demonstration and some pre research work of the major transformation project of Beijing Electron Positron Collider.

High energy physics, also known as particle physics, aims to explore the smallest components of the micro world and the laws of their interactions. In order to study the microstructure, it is necessary to have a high-energy accelerator to produce basic particles, and a detector to detect and accurately measure particles. Therefore, the main tools of high energy physics experiments are accelerators and detectors, which belong to large-scale scientific engineering, with long construction cycle and high investment cost, requiring a large number of scientists and engineers. The research of high energy physics is characterized by relying on large-scale scientific devices and extensive international cooperation.

During his postdoctoral period, Chen Hesheng proposed a unique scheme for the design of the L3 experimental hadron calorimeter, which improved the performance of the detector and greatly reduced the cost. He was adopted by the L3 experiment and published an article in "nuclear instruments and methods." Chen Hesheng's greatest achievement during his postdoctoral period is that he can also make high-level work on Monte Carlo simulation and data analysis of international high energy physics experiment cooperation in China. High energy physics research at the forefront of science is a kind of knowledge exploration. He does not know what will be useful in the future, but he believes that today's science will be tomorrow's technology. Moreover, it is precisely because of the "uselessness" of research that high energy physics has become a window for international cooperation. Even during the cold war, high energy physicists all over the world are cooperating.

In more than ten years after 1988, Chen Hesheng, on the one hand, presided over the Beijing Electron Positron Collider major transformation project (BEPC II), which made the performance of the reconstructed high energy accelerator nearly 100 times higher than before, and became one of the most advanced double ring colliders in the world. On the other hand, combined with the latest progress of international particle physics, he proposed to strengthen the experimental research of non accelerator physics, such as particle astrophysics experiment, Yangbajing cosmic ray observation and Daya Bay Reactor Neutrino Experiment, and made many world-class scientific and technological achievements, including the discovery of some new particles. At the same time, he also led the Institute to actively strengthen international cooperation and achieved many fruitful results.

The development of high energy physics in China embodies the dreams and efforts of several generations of Chinese high energy physicists. After decades of struggle, BEPC / bes has made China's high energy physics occupy a place in the world, making the institute one of the eight high energy accelerator centers in the world. The data obtained by scientists in BEPC and bes are more than one order of magnitude higher than other previous international experiments, with good quality. They constitute the largest data sample in the charm energy region in the world today, and have achieved fruitful physical results. In 2004 alone, the bes cooperation group published 26 papers in world famous journals, exceeding the historical level and refreshing a large number of data in the international authoritative particle data manual. Chen Hesheng is leading the major renovation project of BEPC to improve its performance by two orders of magnitude. It will be the best accelerator in this energy region in the world. It is expected to obtain major innovative achievements, maintain and develop our leading position in the world of charm region physics, and vigorously promote the development of accelerator and detector technology and high technology in related fields in China.

In the mark-j experiment, Chen Hesheng systematically developed the calibration method of shower counter, improved the position and energy resolution, thus improved the accuracy of energy flow measurement, and made contributions to the discovery of three injection cases. Participated in the formulation of experimental physics scheme and detector design of CERN L3, responsible for the reconstruction of hyperhadron quantizer package, and carried out the analysis of physical results, verification of standard model on L3, determination of electric weak parameters and neutrino algebra. As the technical director of the development of large permanent magnet system of alpha magnetic spectrometer, he led and coordinated the work of the cooperation group, and made important contributions to the overall scheme of the system, the application of high energy physics Monte Carlo method in the design, optimization of the detector and space environment simulation test. Presided over the BEPC II scheme design, feasibility demonstration and some pre research work of the major transformation project of Beijing Electron Positron Collider. Propose BEPCII scheme, lead the design, pre research and project approval of BEPCII, formulate double loop scheme and preside over project construction and commissioning.

Chen Hesheng's experiments in accelerator physics include: (1) testing the standard model accurately and measuring its basic parameters; (2) testing the standard model accurately

Chinese PinYin : Chen He Sheng