. 2017 Oct 20;7:13637. doi: 10.1038/s41598-017-14046-z

Table 1.

The specifications of the analyzer parameters used for MultiFLEXX. All analyzers are composed of 3 HOPG crystals of 20 × 20 mm² cross section.

Channel	2.5 meV	3 meV	3.5 meV	4 meV	4.5 meV
$D_{s a m p l e}$ [mm]	1050	1220	1387	1552	1732
$ρ$ [1 /m]	0.76	0.6	0.5	0.41	0.37
$Δ E_{s i m}^{F W H M}$ [ $μ$ eV]	53	78	103	130	157
$Δ E_{m e a s}^{F W H M}$ [ $μ$ eV]	89	106	123	140	164
take-off angle $2 θ_{A}$ [deg.]	116.98	102.20	92.20	84.74	78.90
$k_{f}$ [ $Å^{- 1}$ ]	1.1	1.2	1.3	1.39	1.47
$Ω$ [a.u.]	1	0.68	0.48	0.36	0.27
$V_{r e s}$ [a.u.]	1	1.70	2.57	3.59	4.71
Normalization factor	1	1.16	1.23	1.30	1.27

The elastic linewidths $Δ E_{s i m}^{F W H M}$ were simulated using McStas, and the tabulated measured elastic linewidths $Δ E_{m e a s}^{F W H M}$ are averages over all analyzers with the same $E_{f}$ . The curvature of the analyzer segments is given by ρ. The covered solid angle $Ω$ has been calculated from the sample-analyzer distance $D_{s a m p l e}$ and the take-off angle $2 θ_{A}$ . The resolution volume $V_{r e s}$ is calculated directly from the take-off angle and the final wavevector $k_{f}$ . Both variables are normalized to the values for the $E_{f} = 2.5$ meV analyzer.