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china news service, beijing, october 4 (reporter sun zifa) the institute of high energy physics, chinese academy of sciences (institute of high energy physics) issued an obituary on the evening of the 4th: academician of the chinese academy of engineering, famous experimental high energy physicist, particle detection technology expert, former institute of high energy physics, chinese academy of sciences director ye minghan died in beijing at noon that day at the age of 99 due to ineffective treatment.

ye minghan is one of the pioneers of low-energy accelerators, low-energy nuclear physics experiments, particle control measurement technology and high-energy physics experiments in china. he is the main researcher of the large-scale scientific research projects "beijing electron positron collider (bepc) and beijing spectrometer (bes)" one of the leaders, he has made important contributions to china's construction of nuclear physics and high-energy physics experimental bases and its place in the world's high-energy physics experimental research field.

according to the institute of high energy of the chinese academy of sciences, in the 1950s, ye minghan participated in the development of china's first and second charged particle accelerators (electrostatic accelerators with energy of 700 kiloelectronvolts and 2.5 megaelectronvolts), and was responsible for their operation and improvement, and obtained a number of important results. afterwards, he took the lead in developing a variety of particle detectors, carried out china's first batch of nuclear physics experiments, and performed physics work at an international level.

in the 1970s, ye minghan and xiao jian presided over the development of particle detectors commonly used in high-energy physics experiments such as multi-filament proportional chambers and drift chambers, and took the lead in realizing computer online data acquisition of multi-filament proportional chambers in china.

ye minghan has presided over the construction of the beijing spectrometer, a large-scale high-energy physics experimental particle detection device, since 1982. the device was completed in 1988 and has achieved a series of internationally significant results such as the accurate measurement of cerium lepton mass. he has won the special prize of the national science and technology progress award and other awards.

the obituary stated that ye minghan trained a large number of outstanding students, most of whom became the backbone of high-energy physics and nuclear physics research. he is very concerned about the sustainable development of china's high-energy physics industry, and has put forward many useful suggestions for the major renovation project of the beijing electron positron collider and the construction of beijing spectrometer iii, laying a solid foundation for achieving better physics results. (over)