Techniques¶
What CORA would run at XFM: scanning X-ray fluorescence microscopy, a Catalog Method bound through an NSLS-II Practice. XFM is the second scanning-XRF beamline (after 2-ID) and follows the same Method-deferral discipline.
XFM's science is element mapping: raster the sample through a focused beam and read the fluorescence spectrum at each point, in a step grid or a Maia continuous fly-scan. The Method below renders unlinked and stays pending until the owner-scope decision (METHOD-1) brings it into the catalog.
| Technique | Mode | Detector | Status in CORA |
|---|---|---|---|
| Scanning XRF mapping | raster (step grid or Maia fly) | EnergyDispersiveSpectrometer (Xspress3 / Maia) |
the 2-ID scanning_fluorescence_microscopy Method, pending; XFM is the 2nd consumer (METHOD-1) |
| XANES microspectroscopy | energy sweep over the EnergyAxis |
EnergyDispersiveSpectrometer |
the BMM energy-scan question; energy_scan deferred (ENERGY-1), no practice |
| XRF-tomography | raster x rotation | EnergyDispersiveSpectrometer |
out of scope: no rotation axis in the profile (TECH-1) |
Why the Method stays pending¶
XFM reuses the scanning_fluorescence_microscopy Method that 2-ID left pending. Unlike a loose device Family (which a second sighting promotes on a mechanical rule-of-three), a pending Method has no automatic promotion: it is coined by deliberate decision when a conduct-path needs it, the same discipline that keeps energy_scan deferred even across several consumers. XFM makes scanning_fluorescence_microscopy a two-consumer Method (2-ID + XFM), which strengthens the eventual case to coin it but does not force it in a descriptor scaffold (METHOD-1). The device Roles already exist (the SDD presents the energy-dispersive Sensor, the raster stage presents Positioner), so what is pending is the recipe, not a device shape.
The XANES microspectroscopy leg sweeps the monochromator energy across an absorption edge, which leans on the deferred energy_scan Capability (the BMM ENERGY-1 question); no XANES practice is recorded until that Capability lands, the SRX / BMM discipline. The XRF fitting and any tomographic reconstruction are ComputePort work, not beamline Methods.