HXN¶
Scanning hard X-ray nanoprobe at NSLS-II, beamline 3-ID: nano-XRF mapping, ptychography, nano-tomography, and spectro-tomography. This page describes how CORA would model and run HXN; the model is reverse-engineered from public configuration, not yet confirmed by HXN staff.
| Property | Value |
|---|---|
| Asset | HXN (root Asset, tier = Unit, parent_id = None) |
| Facility | NSLS-II (bound via facility_code = "nsls2", FacilityKind = Site) |
| Sector | Sector 3 (PV namespace XF:03ID*) |
| Institution | Brookhaven National Laboratory (context; not modeled as an Asset or Facility) |
| Status | Reverse-engineered from public config (design-phase scaffold) |
| Source | IVU20 in-vacuum undulator (SR:C3-ID:G1{IVU20:1}) |
How CORA would land on HXN
These pages describe how CORA would model, govern, and conduct HXN, the second NSLS-II beamline after FXI. They are not a survey of the beamline's current software. The hardware facts (devices, EPICS PVs, axes, enclosures) are read from public NSLS-II open source (the NSLS2/hxn-profile-collection profile collection) and verified against it; vendor part numbers, controller models, and physical positions are not in it, so they, and every read value, are carried confirm until HXN staff verify them (Open questions). This is a design-phase scaffold: the descriptor and these docs, with scenarios deferred.
The defining shape: a scanning probe¶
Where FXI is a full-field microscope (flood the sample, image the whole field at once), HXN is a scanning probe: a zone plate or a multilayer Laue lens focuses the beam to a nano-spot, the sample is rastered through that spot, and several detectors are read at every dwell point, a fluorescence spectrometer for element maps, a pixel detector for ptychography, and flux counters for normalization. The sample position axes are the scan. This is the new shape HXN brings to CORA, distinct from every prior full-field or single-shot deployment.
The beamline¶
Along the beam, in order:
- Source: the in-vacuum undulator and the optics hutch (
3-ID-A), rendered as the generated source-stage device walk: the double-crystal monochromator, three mirrors, and the white-beam slits. - Sample: the two focusing optics (zone plate, multilayer Laue lens), their order-sorting apertures and beam stops, and the nano-positioning sample stack rastered through the focus.
- Detector: the per-point detectors read together during a scan (fluorescence spectrometer, pixel detectors, flux counters).
Cutting across all three:
- Controls: the Zebra position-capture trigger and the motion controllers (Power PMAC, Attocube ANC350), which HXN exposes in source.
The cross-cutting reference view is the Inventory: the flat Asset tree by parent_id with families, PVs, and the values still pending confirmation.
Techniques¶
Techniques: what HXN would run, each a Catalog Method bound through an NSLS-II Practice. The scanning and ptychography Capabilities are deliberately not coined yet (see the page).
Governance¶
Governance: who may act at HXN and the trust shape CORA applies. People and agents are facility principals at the NSLS-II Site; CORA brings its own per-Actor authority.
Model¶
Model: the developer's by-kind index into where each CORA aggregate's HXN content lives.