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The beamline

The CHX beam path, area by area. CORA models the beamline as one root Asset (CHX) with the devices nested below it; this page is the human walk, the Inventory is the flat reference.

CHX runs from the in-vacuum undulator through a first-optics hutch into a long endstation where the coherent beam meets the sample and the speckle pattern is recorded. Two enclosures carry it:

  11-ID-A  (optics hutch / FOE)            11-ID-B  (endstation)
  ----------------------------------       --------------------------------------
  IVU20  ->  DCM / DMM  ->  HDM mirror      BDS / guard slits -> sample -> Eiger
             transfocator -> slits          GI mirror                      beamstop
  • Source (11-ID-A): the IVU20 undulator and the front-end shutter, then the optics, the silicon and multilayer monochromators, the horizontal-deflecting mirror, the compound-refractive-lens transfocator, and the pink/mono-beam slits. This page is generated from the descriptor.
  • Sample (11-ID-B): the endstation beam-defining and guard slits that condition the coherent beam, the grazing-incidence mirror, the sample stack positioned in the coherent focus, and the Linkam thermal stage.
  • Detector (11-ID-B): the Eiger area detectors that record the speckle time series, the SAXS detector positioner and beamstop, the flux counter, and the occasional fluorescence detector.
  • Controls: the Zebra trigger gating the fast shutter and detector frames, and the motion controllers.

Each device binds a catalog Family and a verified EPICS PV; none binds a vendor Model (part numbers are not in the public config). The compound-refractive-lens optic reuses the graduated Transfocator catalog Family (a CRL focusing optic, shared with other deployments). The one loose family is the BeamPositionMonitor, shared with other deployments and held for gate-review.