Specifications |
Source: BM Energy Range: 1.7~11 keV Focused Beam Size: 0.3*0.62 mm2 (Micro-beam: 5*5 μm2) Photon Flux : 1012 p/s @5 keV Energy Resolution (ΔE/E): InSb(111) 2.8*10-4, Si(111) 1*10-4 High Harmonic Ratio: < 10-4 |
| Collimating mirror (CM) and Toroidal focusing mirror (TFM) bilayer coating |
A bilayer coating, a 12 nm Carbon (C) layer on top of a 30 nm Platinum (Pt) layer, is selected on the surface of the mirrors with an incident angle of 7.0 mrad instead of two separate coatings on parallel stripes to cover the energy range of 1.7 – 11 keV. The top carbon layer is optimized for suppressing the M-edge features of the bottom Pt layer. 
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Double-bounce high-order harmonics rejection mirrors (HHRMs) |
Since the double-bounce HHRMs serve as the first optics from the source, it also functions as a sink to reduce the thermal load on later optics. The purpose of the second HHRM is mainly to keep the outgoing beam with a constant offset when the incident angle of HHRMs is changed. Therefore, the double-bounce HHRMs system could maintain the incident and outgoing light parallel with a constant offset value. Each of the HHRMs has two separate parallel stripes with different coating materials (Pt and C) coating. The incident angle of HHRMs is adjustable from 6 mrad to 12 mrad according to the required energy range by rotating both mirrors simultaneously with a common platform. The outgoing beam of the 2nd HHRM keeps a constant offset of 6 mm. 
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Flux and energy resolution |
The calculated flux and the simulated energy resolution (ΔE/E) for InSb(111) and Si(111) crystals as a function of photon energy at the focal point in the endstation. 
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