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High Energy Photon Source (HEPS) is a 4th generation synchrotron radiation facility built in Beijng, China. The designed electron energy of HEPS is 6GeV and the emmitance is lower than 0.1nmrad. This machine can provide the hard X-ray with brilliance higher than 1022ph/s/mm2/mrad2/0.1%BW and photon energy higher than 300keV.
The construction of HEPS started in June 2019, including a 500MeV LINAC, a 6GeV booster, a 1360m-circunference storage ring, 14 public beamlines and 1 test optical beamline, as well as the auxiliary facilities and building.
The installation of storage ring started in February 2023. In July 23, 2024, we started the commissioning of storage ring. Now the beam current can reach to 100mA and the emmitance was 56.8pmrad. The first synchrotron light from insertion device was firstly obtained in October 12, 2024.
During the installation of storage ring, the front-ends of beamlines were installed in Oct. 21, 2022. The first monochromator was installed in Dec. 15, 2023. The commissioning of beamlines was started in Sep. 2024.
In Oct. 29, 2025, HEPS passed the performance acceptance organized by the Chinese Academy of Sciences. HEPS is now poised to serve as a premier platform for original and innovative research across basic and engineering sciences and will open to global users in 2026.
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