Table 1. XM-2 operating parameters.

Beamline name	ALS beamline 2.1 (XM-2)
Source type	Bend magnet
Mirrors	Flat silicon; striped with nickel and gold surfaces
Monochromator	Zone-plate linear
Energy range (eV)	4001300
Flux (512eV)	5 107 photons s1m2
Field of view	15 15m single field; capacity to tile unlimited fields of view
Rotation stage	Custom-designed cryo-rotation stage, allows specimen to be rotated through 360
Specimen environment	70K helium gas; specimen held at atmospheric pressure
Detector type	2048 2048 back-thinned CCD; pixel size 13.5 13.5m
Detector model	Andor iKon-L