Beamline layout 

The source of the BioXAS Imaging beamline is an in-vacuum undulator producing a high spectral brilliance. The overall design of the beamline consists of a collimating mirror, a fixed-exit double crystal monochromator (DCM), a post-monochromator focusing mirror and the Kirkpatrick-Baez (KB) mirrors for micro-focusing the beam (micro mode).

Optics and hardware details

Source

In-Vacuum Undulator (IVU) (Bruker ASC)

Details

• Minimum Gap: 5.2 mm
• Maximum Gap: 40 mm
• Total Number of Poles: 164
• Period: 19.1 mm
• Total Length of Magnet Assemblies: 1600 mm
• Peak field: 1.011 T

Beam

Minimum Energy

6 keV

Maximum Energy

21 keV

Optics

Optical elements

• Pre-mono cyllindrical collimating mirror (M1): Si substrate with two reflective coatings (Si and Rh)
• Post-mono toroidal focusing mirror (M2): Si substrate with Rh coating
• KB mirrors: Si substrate with Rh coating

Monochromator

LN2-cooled constant exit height design (Kohzu)

• Si(111)
• Si (220), phi=0 deg

Detectors

Model

• one 4-element Silicon Drift X-ray detector (Vortex-ME4, SII NanoTechnology)
• one 3-element Silicon Drift X-ray detector (Vortex-ME3)
• two single element Silicon Drift X-ray detectors (Vortex-EM, SII NanoTechnology)

Signal processing

Xspress3 (Quantum Detectors)