Table 1. X-ray parameters and capabilities of the CXI instrument.

Instrument name	CXI
Mirrors, maximum incidence angle	2 SiC on Si, 3.4mrad
Monochromaticity ()†	(SASE), (seeded)
Energy range (keV)	511 (fundamental)
Unfocused beam size (m)	800 at 8.3keV
Focused beam size (m)	10, 1, 0.1
Focusing optics	Be lenses, one- and two-dimensional focusing
	Fixed Si 1m KB pair
	Fixed Si 100nm KB pair
Flux (photons per pulse)	1 1012 (fundamental‡)
Pulse length (fs)	5200, 40 nominal
Repetition rate (Hz)	120, 60, 30, 10, 5, 1, on demand
Optical laser pulse energy (mJ)	3 (800nm), 0.6 (400nm), 0.15 (266nm)
Optical laser pulse width (fs)	10150
Standard detectors	CSPAD (2), CSPAD-140k
Sample delivery	Aerodynamic lens injector for fine aerosols
	Gas dynamic virtual nozzle
	High-viscosity injectors
	In-vacuum fixed target stages
Spectrometer	Ion time-of-flight
	X-ray emission spectrometer

^†Typical single-shot value.

^‡Excluding beamline and instrument transmission.