Table 1. Major operational parameters of SACLA.

	BL1 (SX)	BL2 and BL3 (HX)
Electron beam energy	800 MeV max.	8.5 GeV max.
Bunch charge	0.2–0.3 nC	0.2–0.3 nC
Peak current	0.3 kA	>10 kA
Bunch length	<1 ps (FWHM)	<20 fs (FWHM)
Repetition	60 Hz max.	60 Hz max.
Undulator period	18 mm	18 mm
Undulator K value	2.1 max.	2.7 max.
No. of undulator units	4.5 m × 3	5 m × 18 (BL2), 5 m × 21 (BL3)
Photon energy	40–150 eV	4–15 keV
FEL pulse energy	0.1 mJ at 100 eV	0.7 mJ at 10 keV