Open research projects and pre-research projects undertaken by modern physics have passed acceptance       


On October 17, the Institute of Modern Physics undertook the major infrastructure open research projects of the Chinese Academy of Sciences, namely "Research on the characteristics of unstable nuclei", "Application of evaporative cooling technology in the field of accelerators" and "Pre-research on Key Technologies of heavy ion accelerator devices (HIAF)", which passed the acceptance of the expert group organized by the Academy's Conditions Guarantee and Finance Bureau.

The acceptance meeting will be presided over by Zeng Gang, Director of Major Facilities Department of the Bureau of Conditions Guarantee and Finance. Experts from Peking University, Lanzhou University, Institute of High Energy Physics, Institute of Electrical Engineering, Institute of Information Engineering, Institute of Theoretical Physics and Institute of Plasma Physics listened to the "Study on the Characteristics of Unstable Nuclei" by Zhou Xiaohong, the "Application of Evaporative Cooling Technology in Accelerator" by Zhao Hongwei and the "Heavy Ion Accelerator Equipment". Summary report on acceptance of HIAF Key Technologies Pre-research and other projects.

After discussion, the Group of Experts concluded that:

The project "Research on the Characteristics of Unstable Nuclei" has developed advanced experimental techniques, carried out many research topics such as "Precise Measurement of Nuclear Mass" and "Synthesis of New Nuclides", and published more than 50 SCI papers in the world, including 3 PRL papers. The project not only achieves the assessment target of the task book, but also improves the openness of Lanzhou heavy ion accelerator.

The project "Application of Evaporative Cooling Technology in Accelerator Field" first applied evaporative cooling technology to the cooling of magnet coil of ECR ion source, and developed the world's first high-charge ECR ion source based on evaporative cooling technology. Field tests show that the evaporative cooled ECR ion source has better performance than the normal temperature ion source and can supply beams for long time stable operation of heavy ion RFQ accelerator. Its performance is superior to that of GTS high charge ECR ion source developed by Grenoble-CEA of France for CERN-LHC. The project has completed all the research contents stipulated in the task book, and the main performance indicators and test results of the ion source have reached or exceeded the assessment indicators of the task book.

The project of "Pre-research on Key Technologies of Heavy Ion Accelerator Device (HIAF)" has built an experimental platform for high-charge laser ion source, and produced a series of high-charge short-pulse metal ion beams. The beam intensity of different kinds of charged ions reaches several milliamperes to 100 milliamperes. The beam intensity and pulse repeatability of some ions are higher than those of the same kind of ion source in the world. The laser ion source has provided 12C6 + ion beams for two RFQ accelerators, and debugged the beam current of the RFQ accelerator. The operation of the ion source and its auxiliary system is stable and reliable. The cavity of QWR superconducting cavity has been developed successfully. The experimental results show that the cavity meets the design requirements and HIAF requirements. It can be used as the technical choice of HIAF Superconducting Linear injector superconducting cavity. The project has completed all the research contents stipulated in the task book. The technical tests show that the main performance indexes and debugging results of the equipment meet the assessment targets of the task book, which lays a foundation for the design and construction of the front-end ion source and Superconducting Linear injector of the "12th Five-Year Plan" device "High Current Heavy Ion Accelerator (HIAF)" undertaken by the Institute of Modern Physics.

Three project management norms, the financial system is relatively complete, and the use of funds is basically reasonable. Through the implementation of three projects, a number of young academic backbones have been stabilized and trained.

The Expert Group unanimously agreed that three projects had passed the acceptance test.