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4B9B-Photoemission Spectroscopy

4B9B is a Photoemission Spectroscopy beamline and locates at IV quadrant of BEPC and 12# experimental hall. This beamline runs not only in the dedicated mode of synchrotron radiation but also in the coupling mode.


Now this beamline is upgrading now. The new station will be composed of eight chambers each with its own distinctive functionality. The radial distribution chamber is the center of the endstation, with a function of distributing sample between the chambers around it under ultrahigh vacuum condition. The analysis chamber made of metal will be equipped with electron analyzer of 2D MCP-CCD detector, MCP-LEED, X-ray Al/Mg cathode gun, VUV light source, and low temperature sample manipulator. The STM chamber is with varied temperature ability. The sample preparation chamber has high temperature, >1500K, annihilation ability. Laser-MBE and MBE both aimed at layer-by-layer thin film growth of complex oxide systems and simple metal systems, respectively.


Beamline Specs



   Energy range

15-1000 eV

   Flux (photons/sec)




   Beam Size (HxV)



Local Contacts

   Name: Kurash Ibrahim        Phone: 0086-10-88235992      Email: kurash@ihep.ac.cn

   Name: Haijie Qian          Phone: 0086-10-88235992      Email: qianhj@ihep.ac.cn

   Name: Jiaou Wang         Phone: 0086-10-88235992      Email: wangjo@ihep.ac.cn


Current Status: Upgrading

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