Techniques¶
What the modelled part of ESM is designed to do, as intent. First cut.
A technique is a portable Catalog Method; a Practice is how a facility adapts it. ESM's technique is angle-resolved photoemission, a photoemission method new to CORA's catalog, so the Method below renders unlinked and is carried pending until a technique enters scope (TECH-1).
Angle-resolved photoemission¶
ARPES illuminates the sample with monochromatic soft X-rays and measures the kinetic energy and emission angle of the photoelectrons, mapping the electronic band structure. The measurement is the electron distribution recorded by the hemispherical analyzer over a pass-energy and lens-mode window, at a sample orientation set by the cryostat manipulator.
| Technique | Catalog method | Notes |
|---|---|---|
| Angle-resolved photoemission | angle_resolved_photoemission |
electron energy / angle spectra on the Scienta SES analyzer, at low temperature on the UHV manipulator; Method not yet in catalog |
It needs the grating monochromator (the incident energy), the UHV cryostat manipulator, and the electron analyzer. Polarization is set by the dual EPUs.
Not modelled yet¶
The XPEEM/LEEM photoemission-microscopy branch is deferred (a future ElectronMicroscope Family; see Model). The concrete acquisition recipes (Fermi-surface maps, energy-distribution curves, the analyzer sweep settings) are not written yet; they join as the deployment approaches the point where CORA drives ESM. See Open questions for the world-facts to confirm first.