The HiSOR has two insertion devices, a linear undulator and a helical undulator, in the two linear sections of the ring and has an electron energy of 0.7 GeV with a nominal beam current of 300 mA . The ring itself has a circumference of 22 m.
22.
In an X-ray FEL the typical undulator wavelength of 1 cm is transformed to X-ray wavelengths on the order of 1 nm by \ gamma H " 2000, i . e . the electrons have to travel with the speed of 0.9999998 " c ".
