SST¶
Spectroscopy Soft and Tender at NSLS-II, beamline 7-ID: a dual-branch, multi-endstation beamline spanning soft X-ray scattering (RSoXS), absorption (NEXAFS), and photoemission (HAXPES). This page describes how CORA would model and run SST; the model is reverse-engineered from public configuration, not yet confirmed by SST staff.
| Property | Value |
|---|---|
| Asset | SST (root Asset, tier = Unit, parent_id = None) |
| Facility | NSLS-II (bound via facility_code = "nsls2", FacilityKind = Site) |
| Sector | Sector 7 (PV namespace XF:07ID*) |
| Institution | Brookhaven National Laboratory (context; not modeled as an Asset or Facility) |
| Status | Reverse-engineered from public config (design-phase scaffold) |
| Source | two insertion devices: soft EPU60 (SR:C07-ID:G1A{SST1:1}) + tender U42 (SR:C07-ID:G1A{SST2:1}) |
How CORA would land on SST
These pages describe how CORA would model, govern, and conduct SST, the twelfth NSLS-II beamline after FXI, HXN, BMM, SRX, SIX, CHX, CSX, XPD, ESM, SMI, and IXS. 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/sst-*-profile-collection endstation repos and the shared NSLS-II-SST/sst-base package) and verified against it; vendor part numbers and physical positions are not in it, so they, and every read value, are carried confirm until SST staff verify them (Open questions). This is a design-phase scaffold: the descriptor and these docs, with scenarios deferred.
The defining shape: two branches, many techniques, one beamline¶
SST is the broadest NSLS-II beamline CORA models: two source-and-monochromator branches (a soft branch, an EPU60 undulator with a plane-grating monochromator; a tender branch, a U42 undulator with a double-crystal monochromator) feeding several endstations across three technique families, soft X-ray scattering (RSoXS), absorption spectroscopy (NEXAFS), and photoemission (HAXPES). The value to CORA is breadth at the Site level: it reuses the soft-X-ray vocabulary the earlier NSLS-II beamlines earned (the GratingMonochromator, the Manipulator, the ElectronAnalyzer) across one more, larger instrument, and it brings the ElectronAnalyzer family to its second sighting, which GRADUATED it into the catalog. SST coins no new catalog Family of its own.
The beamline¶
Along the beam, in order:
- Source: the two branch undulators (soft EPU60, tender U42) and the front-end shutter, then the optics, the soft plane-grating and tender double-crystal monochromators, the mirrors, and the slits.
- Sample: the soft (RSoXS) and tender (HAXPES) sample manipulators, and the thermal environment.
- Detector: the detectors that make SST multi-technique, the soft-scattering CCD, the hemispherical electron analyzer, the microcalorimeter, and the flux monitors.
Cutting across all three:
- Controls: the fast shutter that gates the exposure, the branch-selection, and the motion controllers.
The cross-cutting reference view is the Inventory.
Techniques¶
Techniques: the soft-scattering, absorption, and photoemission techniques SST runs, and why their Capabilities stay deferred.
Governance¶
Governance: who may act at SST 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 SST content lives, and the ElectronAnalyzer graduation it earned.