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. 2020 Jan 28;27(Pt 2):515–528. doi: 10.1107/S1600577519016813

Table 1. Global beamline specifications and performance measured prior to the December 2018 shutdown, and anticipated at restart in 2020.

  Pre-upgrade EBS (if changed)
Photon source parameters (50 keV)
 RMS beam size (σ) (V × H) 4.4 µm × 49.6 µm 4.4 µm × 27.8 µm
 Divergence (θ) (V × H) 4.5 µrad × 105.5 µrad 4.4 µrad × 6.8 µrad
Source 1 U22 undulator CPMU18 undulator
 Length 2 m 1.5 m
 Period 22 mm 18 mm
 Maximum deflection parameter (K) 1.788 1.75
 Total power (6 mm gap) 6.9 kW 7.4 kW
Source 2   W76 Wiggler
 Length   0.53 m
 Period   76 mm
 Maximum deflection parameter (K)   13.2
 Total power   8.4 kW
Argon gas filter
 Length 1 m  
 Pressure 350 mbar  
Metal-coated diamond filters
 Thickness (diamond) 300 µm  
 Thickness (Cu) 0.8–25.8 µm 0.0–5.1 µm
Vertical focusing transfocator (TF1)
 Distance from source 32 m  
 Distance from sample 33 m  
 Lenses apex radius 100 µm  
 Lenses vertical geometrical aperture 650 µm  
 Focused vertical FWHM at sample 15 µm 15 µm
Double multilayer monochromator (DMLM)
 Materials [Ni93V7/B4C]500  
d-spacing 1.996 nm  
 Band-pass (ΔE/E) 0.37%  
 Cooling Water  
 Energy range 20–70 keV  
 Acceptance (20 keV) 4 mm (V) and 4.5 mm (H)  
 Acceptance (95 keV) 4 mm (V) and 1.0 mm (H)  
 Maximum flux density at sample (30 keV)  (unfocused beam) 4.2 × 1013 photons s−1 mm−2 ∼8.5 × 1014 photons s−1 mm−2
Laue–Laue monochromator
 Lattice Si (111) or Si (311)  
d-spacing (111) 3.1347 Å  
d-spacing (311) 1.6370 Å  
 Bending radius 30 m to ∞  
 Band-pass (ΔE/E) 0.01–1%  
 Cooling Liquid N2  
 Energy range (111) 40–180 keV  
 Energy range (311) 80–250 keV  
 Acceptance 2.0 mm (V) and 2.0 mm (H)  
 Maximum unfocused beam at sample 1.2 mm × 6.4 mm (V × H)  
 Maximum flux density at sample (70 keV)  (unfocused beam) 4 × 1012 photons s−1 mm−2 ∼1.3 × 1014 photons s−1 mm−2
Horizontal focusing transfocator (TF2)
 Distance from source 53 m  
 Distance from sample 12 m  
 Lenses radius 100 µm  
 Lenses horizontal geometrical aperture 650 µm  
 Focused vertical FWHM at sample 35 µm 18 µm
Microfocusing CRLs
 Distance from source 61–64 m  
 Distance from sample 1–4 m  
 Lenses radius 100 µm  
 Lenses horizontal geometrical aperture 650 µm  
 Vertical beam size at sample 0.5–2 µm 0.5–2 µm
 Horizontal beam size at sample 3–9 µm 1.5–5 µm
Kirkpatrick–Baez focusing mirrors
 Distance from source 64.38 m (V) and 64.65 m (H)  
 Distance from sample 0.62 m (V) and 0.35 m (H)  
 Energy range 20–69 keV  
 Output flux at 50 keV with DMLM 1.5 × 1012 photons s−1 4.5 × 1013 photons s−1
 Acceptance 0.3 mm (V) and 0.3 mm (H)  
 Beam size at sample (V × H) 0.3 µm × 0.6 µm 0.3 µm × 0.3 µm