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SSRF Overview




SSRF is composed of a 150 MeV linear accelerator, a 3.5 GeV booster, a 3.5 GeV storage ring, beamlines and

experimental stations.   




Linear Accelerator

The linear accelerator (LINAC) is used as an injector for the booster. The electrons generated by an electron gun are

accelerated by 4 travelling wave RF tubes to 150 MeV. 



The booster is an electron synchrotron with a circumference of 180 meters that accelerates the beam from 150 MeV

to the energy of 3.5 GeV at repetition rate of 2 Hz. It is the full energy injector for the storage ring. 


Storage Ring

The storage ring is a 3.5 GeV synchrotron with a circumference of 432 meters. It has 20 cells in four fold symmetry

and 20 straight sections. The radiation is produced by bending magnets or insertion devices which are installed in the

straight sections. The radiation losses will be compensated by the superconducting RF system. 


Beamlines and Experimental Stations

Synchrotron light emitted by the circulating electrons around the storage ring is transported to the

experimental stations through beamlines, then is filtered and focused by optic components onto the

users’ samples in the experimental stations. The SSRF started its user operation with 7 phase-I

beamlines in May 2009.






SSRF Operation Parameters

Storage Ring Energy

3.5 GeV

Natural Emittance

3.9 nm-rad

Beam Current




200-300 mA

5 mA


0.3 ~ 0.7%

RF Voltage

4-6 MV

Beam Lifetime

10 ~ 30 hrs

Linac Energy

150 MeV

Booster Output Energy

3.5 GeV

Injection interval

10 min (top-up)

Phase I beamlines

7 operational in May 2009