SMI¶
Soft Matter Interfaces at NSLS-II, beamline 12-ID: a small- and wide-angle scattering beamline (SAXS / WAXS) with grazing-incidence (GISAXS / GIWAXS) and in-situ soft-matter cells. This page describes how CORA would model and run SMI; the model is reverse-engineered from public configuration, not yet confirmed by SMI staff.
| Property | Value |
|---|---|
| Asset | SMI (root Asset, tier = Unit, parent_id = None) |
| Facility | NSLS-II (bound via facility_code = "nsls2", FacilityKind = Site) |
| Sector | Sector 12 (PV namespace XF:12ID*) |
| Institution | Brookhaven National Laboratory (context; not modeled as an Asset or Facility) |
| Status | Reverse-engineered from public config (design-phase scaffold) |
| Source | in-vacuum undulator (SR:C12-ID:G1{IVU:1}) |
How CORA would land on SMI
These pages describe how CORA would model, govern, and conduct SMI, the tenth NSLS-II beamline after FXI, HXN, BMM, SRX, SIX, CHX, CSX, XPD, and ESM. They are not a survey of the beamline's current software. The hardware facts (devices, EPICS PVs, axes) are read from public NSLS-II open source (the NSLS2/smi-profile-collection profile collection) and verified against it; vendor part numbers and physical positions are not in it, so they, and every read value, are carried confirm until SMI staff verify them (Open questions). This is a design-phase scaffold: the descriptor and these docs, with scenarios deferred.
The defining shape: scattering, a second facility, plus grazing incidence¶
SMI is the NSLS-II twin of the Diamond I22 (SAXS / WAXS) beamline. It brings that scattering axis to a second facility, and it adds two things i22 does not foreground: grazing-incidence scattering (GISAXS / GIWAXS) off films and interfaces, and a rich set of in-situ soft-matter cells. The value to CORA is reinforcement: the scattering shape (two area detectors read at once, the detector distance setting the accessible Q) ports across facilities with no new vocabulary, and the grazing-incidence geometry is a sample-orientation variant, not a new device family.
A scattering measurement reads the SAXS and WAXS Pilatus detectors simultaneously: the SAXS 2M down an in-vacuum flight path for low Q, the WAXS 900KW on a swing arc for wide Q. SMI introduces no new catalog Family, and its techniques sit on the same deferred Capabilities i22 left pending.
The beamline¶
Along the beam, in order:
- Source: the in-vacuum undulator and the front-end shutter, then the optics, the double-crystal monochromator, the horizontal and vertical focusing mirrors, the compound-refractive-lens transfocator, and the slits and attenuators.
- Sample: the HUB sample stack with grazing-incidence axes, and the Linkam sample environment.
- Detector: the simultaneous SAXS and WAXS Pilatus detectors, the camera-length stage and beamstops, the flux monitor, and the fluorescence detector.
Cutting across all three:
- Controls: the fast shutter that gates the exposure, and the motion controllers.
The cross-cutting reference view is the Inventory.
Techniques¶
Techniques: the scattering techniques SMI runs (SAXS, WAXS, GISAXS, GIWAXS), and why their Capabilities stay deferred (the i22 owner-scope cohort).
Governance¶
Governance: who may act at SMI and the trust shape CORA applies; CORA brings its own per-Actor authority.
Model¶
Model: the developer's by-kind index into where each CORA aggregate's SMI content lives.