Techniques¶
What the modelled part of SYRMEP is designed to do, as intent. First cut.
A technique is a portable Catalog Method; a Practice is how a facility adapts it. SYRMEP is a hard X-ray microtomography beamline, so its core imaging techniques reuse the catalog Methods the fleet's imaging beamlines already share; the helical, white-beam, and phase-retrieval Methods are new to CORA's catalog and render unlinked, carried pending until a technique enters scope (TECH-1).
Microtomography: absorption and phase contrast¶
SYRMEP sets the X-ray energy with the Si(111) monochromator (or passes white / pink beam), then rotates the specimen while the detector records projections. It does absorption tomography, propagation-based phase-contrast tomography (the long sample-to-detector rail), and diffraction-enhanced imaging.
| Technique | Catalog method | Notes |
|---|---|---|
| Microtomography | tomography |
the canonical imaging routine on the rotation stage and camera; reuses the 2-BM tomography Method directly |
| Continuous (fly) tomography | continuous_rotation_tomography |
trigger-driven continuous rotation under DonkiOrchestra; reuses the catalog Method |
| Wide / laminar-beam tomography | mosaic_tomography |
tiled tomography for samples beyond the field of view; reuses the catalog Method |
| Dark / flat field | dark_field, flat_field |
the reconstruction baseline frames; reuse the catalog acquisition Methods |
| Rotation-axis centring | center_alignment |
the alignment step; reuses the catalog Method |
| Helical CT | helical_tomography |
the large-specimen continuous-pitch mode (the XC Hydra photon-counting setup); Method not yet in the catalog, renders unlinked |
| White / pink-beam tomography | white_beam_tomography |
fast tomography with the DCM bypassed; Method not yet in the catalog |
| Phase retrieval | phase_retrieval |
single-distance TIE-HOM / Paganin retrieval (the SYRMEP Tomo Project pipeline); a compute Method not yet in the catalog (COMPUTE-1) |
A clean re-test of the imaging spine¶
SYRMEP's significance for the catalog is that it forces nothing new at the Family level: every device binds an existing imaging Family (RotaryStage, LinearStage, Camera, Scintillator, Slit, Filter, Monochromator), and the core tomography Practices bind real catalog Methods. It is the cleanest re-test the fleet has of whether the imaging spine ports to a brand-new Site and control house-style. The clinical breast-CT programme (SYRMA-3D) and the large-specimen helical work are extensions that would earn new Methods if the deployment enters pilot scope.
Not modelled yet¶
The concrete acquisition recipes (the exposure, projection counts, angle ranges, propagation distances, and the phase-retrieval and ring-removal parameters) are not written yet; they join as the deployment approaches the point where CORA drives SYRMEP. Whether helical CT, white-beam tomography, and phase retrieval enter CORA's catalog is an owner-scope decision on Model; see Open questions for the world-facts to confirm first.