Techniques¶
What the modelled part of P03 is designed to do, as intent. First cut.
A technique is a portable Catalog Method; a Practice is how a facility adapts it. P03 runs small- and wide-angle X-ray scattering, which earns no catalog Method today, so the Methods below render unlinked until a technique enters scope (TECH-1).
Small-angle X-ray scattering¶
P03 focuses the beam (the multilayer monochromator feeding the CRL or the GINIX waveguide) to a micro or nano spot, illuminates the sample, and reads the small-angle scattering on the Pilatus area detector at a distance.
| Technique | Catalog method | Notes |
|---|---|---|
| Small-angle X-ray scattering (SAXS) | small_angle_scattering |
the focused beam on the sample read by the Pilatus at a SAXS distance; reuses the small_angle_scattering slug, a further consumer (TECH-1) |
Wide-angle X-ray scattering¶
The microfocus endstation's Pilatus 1M reads the wide-angle scattering simultaneously with the SAXS signal.
| Technique | Catalog method | Notes |
|---|---|---|
| Wide-angle X-ray scattering (WAXS) | wide_angle_scattering |
the Pilatus 1M reading the wide-angle signal; reuses the wide_angle_scattering slug, a further consumer (TECH-1) |
A new technique family on familiar vocabulary¶
P03 is PETRA III's first SAXS / WAXS beamline. Its techniques reuse the small_angle_scattering and wide_angle_scattering slugs already in the catalog's method vocabulary (the same slugs the NSLS-II SMI / CMS and Diamond i22 scattering beamlines carry), so neither forces a new Method to be coined now. The instrument anatomy reuses existing Families: the monochromator binds Monochromator, the mirrors Mirror, the CRL and GINIX hexapods Hexapod, the slits Slit, the detectors Camera. The GINIX nanofocus adds a waveguide (modelled as a Hexapod carrier plus LinearStage waveguide stages) and a sample rotation (RotaryStage) that suits scanning / nano-imaging, but no new Family.
Not modelled yet¶
The concrete acquisition recipes (the SAXS / WAXS exposure sequences, the GINIX scanning / waveguide alignment, the grazing-incidence variants) are not written yet; they join as the deployment approaches the point where CORA drives P03. Whether the scattering Methods enter CORA's catalog is an owner-scope decision on Model; see Open questions for the world-facts to confirm first.