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The beamline

How SRX's areas relate. The beam runs left to right, source to detector; the sample is a KB-focused spot the specimen is rastered through, with several detectors selecting the technique.

SRX is a multi-technique hard X-ray microprobe: the optics hutch monochromates and pre-focuses the undulator beam, a KB mirror pair brings it to a submicron spot in the nano endstation, and the detector read selects the technique (fluorescence for XRF/XANES, a pixel detector for diffraction, the PCO for imaging).

        5-ID-A (optics hutch)                    5-ID-D (nano endstation)
  +------------------------------+   +-------------------------------------------+
  |  IVU21 undulator -> HDCM ->  |   |  KB nanofocus -> sample raster (+ rotary) |
  |  focusing mirror -> slits -> |-->|  -> Xspress3 (XRF/XANES) | Merlin/Dexela/  |
  |  secondary-source aperture   |   |     Eiger (diffraction) | PCO (imaging)   |
  +------------------------------+   +-------------------------------------------+
        SOURCE stage                     SAMPLE stage        DETECTION stage

  Techniques select by detector: XRF mapping, XANES, XRF-tomography, diffraction, imaging.
  Controls (cross-cutting): Zebra position-capture trigger; endstation motion controllers.
  Resources: photon beam, cooling water, vacuum, liquid nitrogen (HDCM cryocooler), power.
  • Source: the IVU21 undulator and the optics hutch (5-ID-A). The high-heat-load monochromator sets the energy, the focusing mirror pre-focuses, slits define the white/pink beam, and a secondary-source aperture defines the coherent source for the nano endstation. Rendered as the generated source-stage device walk.
  • Sample: the nano endstation (5-ID-D). The KB nanofocus mirror pair, the sample raster stack (plus a rotation for XRF-tomography), the attenuators, and sample-environment thermal control.
  • Detector: the detector set that selects the technique: the energy-dispersive fluorescence detector (XRF/XANES), the pixel detectors (diffraction), the PCO imaging camera, and the flux counters.

Cutting across all three:

  • Controls: the Zebra FPGA position-capture box that hardware-gates per-point triggers during a fly XRF raster, and the endstation motion controllers.

The cross-cutting reference is the Inventory.