Techniques¶
What the modelled part of P22 is designed to do, as intent. First cut.
A technique is a portable Catalog Method; a Practice is how a facility adapts it. P22's HAXPES technique earns no catalog Method today, so the Method below renders unlinked and is carried pending until a technique enters scope (TECH-1).
Hard X-ray photoelectron spectroscopy¶
P22 illuminates the sample with a monochromatic hard X-ray beam (the shared P09 optics, with the phase retarder setting polarization) and measures the kinetic-energy spectrum of the emitted photoelectrons on the electron analyzer, probing bulk / buried electronic structure (the hard X-ray depth advantage over soft X-ray photoemission).
| Technique | Catalog method | Notes |
|---|---|---|
| Hard X-ray photoelectron spectroscopy (HAXPES) | angle_resolved_photoemission |
photoemission on the HAXPS electron analyzer over the shared P09 optics; reuses the angle_resolved_photoemission slug P04 shares, a further consumer (TECH-1) |
A photoemission beamline on familiar vocabulary¶
P22 is the fleet's hard X-ray photoemission beamline. Its technique reuses the angle_resolved_photoemission slug already carried pending (P04, NSLS-II ESM), so it forces no new Method. The instrument anatomy reuses existing Families: the shared optics bind Monochromator / Mirror / the catalog PhaseRetarder, the sample stage Manipulator, and the electron analyzer the catalog ElectronAnalyzer (graduated at NSLS-II ESM, carried pending here since not exposed in the registry). The HAXPES depth sensitivity is a physics consequence of the hard X-ray energy, not a new device.
Not modelled yet¶
The concrete acquisition recipes (the analyzer energy sweeps, the depth-profiling / standing-wave HAXPES, the polarization-dependent measurements) are not written yet; they join as the deployment approaches the point where CORA drives P22. Whether angle_resolved_photoemission enters CORA's catalog is an owner-scope decision on Model; see Open questions for the world-facts to confirm first.