BioXAS-Main
BioXAS-Spectroscopy-Main beamline is optimized for the high-sensitivity X-ray detection on low concentrated samples.
Schematic
More details about the beamline schematic can be found at Ray Tracing Performance.
The image shows the optical design and X-ray tracing simulation of the beamline.
From left to right, the beamline has:
- A wiggler as the source of x-ray.
- A fixed mask to let a fraction of the wiggler output reach the beamline optics.
- A first collimating toroidal mirror M1. It collimates the beam vertically and focuses it horizontally.
- A double crystal monochromator with Si 220 crystal set.
- A second, focusing, mirror M2.
- A set of Double-Bounce Harmonic Rejection Mirrors (used for some energies, and not shown in the figure).
- A set of vertical and horizontal slits in front of the sample.
- The sample plane, where the sample is illuminated by the beam.
The detectors, which are not shown in the picture, are detailed in section (link when available)
| Energy Range | 5 – 32 keV |
| Resolution DE/E | 1 x 10⁻⁴ |
| Spot size | 3 mm x 0.5 mm (W x H) @ 12 keV |
| Flux | 1 x 10¹² @ 12 keV |
| M₁ Mirror | M1 mirror: Toroidal, 1 m, Si, Rh-coated, Sagittal radius: 33 mm. Water-cooled. |
| Monochromator | Monochromator: LN2 cooled, Si(220), ϕ = 0ᵒ & 90ᵒ, double-crystal, non-fixed exit slit (see mono glitch database) |
| M₂ Mirror | Flat Bent, vertically focusing, 1.1 m. Si, Rh-coated |
| For energies below 10 keV, double-bounce harmonics-rejection mirrors (C-coated Si) |
| Detectors | Ionization chambers, PIPS, Canberra 2 x 32-element HPGe solid-state |
| Cryostat | Oxford Helium cryostat, cooled by liquid He Dewar (min. temp 10 K), or liquid Nitrogen Dewar (min. temp 80 k). |
| Other | Shutter and beam-attenuation filters to alleviate beam damage. Soller slits and fluorescence filters to limit scatter radiation in fluorescence mode. |
| GUI based Data Acquisition Manager Software (AcquaMan) and Python Based |
| Automation Package (cls_bxs_control) |
| Automatic scan queuing available for multiple samples and/or multiple spots on the same sample |
| Athena, Larch and Viper for data analysis |