14 ID Beamline
The 14-ID-B station is an insertion device station with two in-line undulators (U23 and U27). A series of choppers, shutters and mirrors is used to isolate a single 100 ps X-ray pulse and to focus the X-ray beam onto the sample. This produces a high peak power in a short 100 ps burst. In the standard mode of operation, the monochromator is not used and the secondary KB mirrors permit focusing down to 20 x 20 µm2 (H x V). If the monochromator is used, 100 ps monochromatic experiments can be performed. This station supports Laue and Time-Resolved Crystallography, and Time-Resolved Solution Scattering. It also supports all standard macromolecular crystallography techniques using the full, unpulsed monochromatic beam.
- Heat Load Chopper: Reduces heat load on downstream optics by ~99 %.
- Si (111) double-crystal monochromator: Can be used to produce monochromatic beam.
- Primary KB mirror system
- Julich chopper: Used to isolate single X-ray bunches from the APS in 24 bunch and hybrid modes.
- Secondary KB mirror system
- Energy range:
– 7-15 keV
– ΔE/E: 1.4 x 10-4(monochromatic)
– ΔE/E: 5 x 10-2 (polychromatic)
- Beam size, horizontal x vertical (FWHM):
– 20 x 20 µm2
- Pink beam flux:
– 3 x 1010 photons/100ps X-ray pulse in APS hybrid mode
- Sample positioning:
– ALIO diffractometer with a 1 um sphere of confusion
– High resolution color sample alignment cameras
– Automated crystal centering
- Sample to detector distance:
– 100 to 800 mm adjustable
- Sample temperature control:
– Liquid nitrogen sample cooler
- Rayonix MX340-HS