Techniques

What the modelled part of 9-ID is designed to do, as intent. First cut.

A technique is a portable Catalog Method; a Practice is how a facility adapts it. 9-ID's techniques are coherent surface scattering and grazing-incidence scattering, new to CORA's imaging-heritage catalog, so the Methods below render unlinked and are carried pending until one enters scope (TECH-1).

Coherent surface scattering

The CSSI signature: a coherent beam strikes the sample surface at a shallow grazing angle, so the scattered intensity is sensitive to surface structure and, over time, surface dynamics.

Technique	Catalog method	Notes
Coherent surface scattering	coherent_surface_scattering	the grazing-incidence coherent measurement on the area detectors; Method not yet in catalog
Surface XPCS	xpcs	time-correlation of the surface speckle pattern; shares the 8-ID xpcs catalog Method (its DAQ-owned high-rate-stream execution is the event-stream axis, Stage 1)

Both need the grazing-incidence sample stack (the incidence rotation sets the angle) and the coherent detectors.

Grazing-incidence scattering

GISAXS and GIWAXS read the small- and wide-angle scattering from the grazing-incidence geometry.

Technique	Catalog method	Notes
Grazing-incidence scattering	grazing_incidence_scattering	GISAXS on the Pilatus / Eiger and GIWAXS on the pedestal detector (TECH-1)
Wide-angle scattering	wide_angle_scattering	the GIWAXS leg; shares the i22 WAXS Method

It needs the same sample stack and the WAXS detector on its pedestal.

Not modelled yet

The concrete acquisition recipes (incidence-angle scans, correlation time series, frame rates, exposures) are not written yet; they join as the deployment approaches the point where CORA drives 9-ID. Whether these Methods enter CORA's catalog is an owner-scope decision on Model; see Open questions for the world-facts to confirm first.