High Energy Photon Source (HEPS), one of the key projects listed in the “13th Five-year Plan for national major scientific and technological infrastructure”, is an important platform for supporting the original and innovative research in the fields of basic science and engineering science.

HEPS is a high-performance and high-energy synchrotron radiation light source with a beam energy of 6GeV and an ultra-low emittance of better than 0.06nm×rad. HEPS is mainly composed of accelerator, beamlines and end-stations. After a series of optimization and usage of state-of-the-art technologies, including the key technology that has been made breakthrough in the HEPS-TF project, HEPS is not only internationally advanced, but also suits the development of Chinese user communities.

Mission

HEPS will be the first high-energy synchrotron radiation light source in China. It will make many contributions to the development of science and technology in China. This light source can provide essential support for the breakthroughs in technological and industrial innovation. In the mean time, HEPS provides a state-of-the-art and multi-disciplinary experimental platform for basic science researchers. At HEPS, researchers will be able to observe the complex samples by more sensitive, finer, faster experimental tools, under the conditions close to the actual working environment. Therefore, researchers will be able to obtain the multidimensional, real-time, in-situ characterization of samples structure, as well as the dynamic evolution processes. Therefore, HEPS can help researchers to understand matter more accurately at the level of molecules, atoms, electrons and spin and in the dimensions of space, time and energy. On the basis of this deep understanding on matter, HEPS can provide a scientific basis for solving the increasingly severe challenges faced by China in the fields of resources, energy, environment, population and health.

Construction Content

The main construction content of HEPS project is composed of accelerator, beamlines, end-stations, supporting facilities and so on. The main contents include:

1. The accelerator consists of a storage ring with the electron energy of 6 GeV, linear accelerators, transport lines, booster and so on.

2. In the phase I, 14 public beamlines and corresponding experimental stations will be constructed.

3. Civil construction including accelerator tunnels, experimental hall, and utilities including water supply, power supply, air conditioning, radiation protection, et al.

Scientific Objectives

1. Providing the multi-dimensional, real-time, in-situ characterization of the microstructure of materials, to understand the formation and evolution of the material structure among the whole life cycle of materials.

2. Providing the high spatial, energy, time resolution probing tools for local structures inside a complex system, to elucidate the relationship between structures and properties as well as performances of matters.

Engineering Objectives

1. HEPS would be a world-leading high-energy synchrotron radiation source. The storage ring with electron energy of 6GeV and emittance lower than 0.06nm×rad, would provide the synchrotron beam with will brilliance higher than 1×10²² phs/s/mm²/mrad²/0.1%BW. The hard X-ray with photo energy up to 300 keV would be provide in order to satisfy the requirement of in operando experiments. No less than 90 high performance beamlines and end-stations are capable to be built around the storage ring.

2. The spatial resolution reaches to 10 nm scale in order to detect the single nanoparticle; the energy resolution of 1meV level to understand the subtle processes in condensed matter physics and quantum materials; the time resolution of ps level with high repetition frequency to observe the dynamic process of matters.

Construction Significances

HEPS is an advanced public platform for multidisciplinary innovation research and high-tech development, as well as understand many scientific questions in the fields of physics, chemistry, biology, etc. The construction of HEPS is one important facility in the National Medium- and Long-Term Construction Plan for Major Science and Technology Infrastructure (2012-2030). HEPS can meet the urgent requirements of high-energy and high-brightness X-rays in national development-related research, and expand the synchrotron radiation source to high-energy areas in China. The location of HEPS is in Beijing, which is optimized the geometric distribution of user facilities of China, to promote the development of science, technology and economy in a more harmonious and coordinated way.

The primary goal of HEPS’s construction is to provide high-energy, high-brightness hard X-rays, aiming at meeting the needs of national development-related research. Many studies related to national development and industrial core innovation capabilities, such as in operando studies of engineering materials, require high-energy, high-brightness X-rays. And such X-rays can only be provided by low-emiitance, high-energy synchrotron devices. Therefore, the most important scientific goal of HEPS is to meet the urgent requirements of research related to the sustainable development of Chinese industry. At the same time, HEPS can also provide higher-intensity X-rays, providing a better support platform for the users in basic scientific research.

Funding Source

The project is supported by the special funds from the state and Beijing. At the same time, the project proposal has received strong support from the Beijing Municipal Government in terms of land supply and matching conditions and has already provided basic guarantees for completing the construction tasks of the project at a high level.

Legal Entity

The legal entity of this project is the Institute of High Energy Physics of the Chinese Academy of Sciences.

The Institute of High Energy Physics of the Chinese Academy of Sciences (IHEP) has been engaged in the research work in the field of large-scale accelerators and synchrotron radiation sources in China. It has long-term scientific research accumulation and extensive international cooperation channels. In particular, contributed to the construction of the “High Energy Photon Source Test Facility” project established during the “Twelfth Five-Year Plan” period, IHEP has accumulated key technologies, talent teams and organizational management skills for the construction of high-energy synchrotron radiation sources in accelerators, beamlines and end stations.