Sample

The sample-scanning stack in the 2-ID-D hutch. Design-phase; values are EAA-corpus inferences carried as confirm.

The sample stage modelled here is the moving heart of the microprobe: the sample is rastered through the focused spot while the detector reads a fluorescence spectrum at each point. It is modelled as one sample-stage group in the descriptor. EAA's aps_mic integration evidences a vertical raster axis (samy) and a standoff axis (samz); the full axis complement is carried coarse and confirm (AXIS-1).

Unlike the 2-BM sample tower or a composed Assembly, the stack is modelled here as a single coarse positioning device, because the EAA corpus does not give the axis-by-axis breakdown a real microprobe carries (typically a coarse XYZ stage plus a fine piezo raster stage). The fine-versus-coarse split firms with the confirmed mechanical layout.

The model in one picture

The stack, base to sample (containment, Asset.parent_id). The precise sub-order and the coarse/fine split firm with the confirmed layout (AXIS-1); the tree below is the EAA-evidenced intent.

2-ID  (Unit, Asset)
└── SamplePositioning  (Device, LinearStage; sample-scanning stack in 2-ID-D)
        samy  (vertical raster axis, evidenced)
        samz  (standoff axis, evidenced)
        horizontal scan axis  (inferred, AXIS-1)

The probe-forming zone plate that the sample scans beneath is modelled on the Source walk (it conditions the beam), not here, even though it sits in the same hutch.

Sample-scanning stack (2-ID-D)

The sample moves through the focused spot in a 2D fly raster (fly2d) or a 1D step scan (step1d); dwell per point is short (EAA carries 0.05 to 0.2 s defaults). The stage is what CORA's Conductor drives during a scan, taking the sequencing EAA's scan_control holds today.

Device	Family	Design spec / note
SamplePositioning	LinearStage	sample-scanning stack; vertical raster (samy) and standoff (samz) evidenced, horizontal scan axis and coarse/fine piezo split unconfirmed (AXIS-1)

A sample environment (an in-situ cryo or heating stage) and a rotation axis are not modelled: EAA evidences neither, and the rotation axis that scanning fluorescence tomography would need is carried as ENV-1. They join as confirmed equipment, as Fixtures or sample environments, once the design firms.

See Open questions for the axis and sample-environment facts still to confirm, and Inventory for the Asset tree.