Table 1. Parameters of the HERIX spectrometer at 30ID at the APS; Q = 2ksin(θ), k = 2π/λ.

E (keV), λ (Å)	Energy resolution (meV)	No. of analyzers	Maximum 2θ(Q) degree (nm−1)	(nm−1)	Beam size, H × V (µm)	Flux at sample (photons s−1 meV−1)
23.724, 0.5226	1.3–1.7	9	35 (72)	±(0.1–0.7)	35 × 15	4.5 × 109