Currently, NXenergydispersion also supports fixed or sweep as ways of scanning the energy (in energy_scan_mode).
There are multiple ideas how to extend this description
From ARPES (@rettigl):
transmission modes, jittered mode
From XPS (@lukaspie):
In XPS/UPS/AES, people typically differentiate between
constant ΔE mode, where the electron retardation (i.e., the fraction of pass energy to kinetic energy, R = (EK - WF/Ep)) is scanned, but the pass energy is kept constant. This is often used in XPS/UPS because the energy resolution does not change with changing energy (due to the constant pass energy). Synonyms are: constant analyser energy (CAE), fixed analyser transmission (FAT) mode
constant ΔE/E mode, where the pass energy is scanned such that the electron retardation ratio is constant. In this mode, electrons of all energies are decelerated with this same fixed factor. Thus, the pass energy is proportional to the kinetic energy. This is often used in AES to improve S/N for high-KE electrons, but this leads to a changing energy resolution (∆E ~ Ep) at different kinetic energies. Synonyms: constant retardation ratio mode. Synonyms: constant retardation ratio (CRR), fixed retardation ratio (FRR) mode
For some vendors, there are also even more modes, like snapshot (where the energy is not scanned at all and the channels of the MCP are not averaged) or measuring at a fixed energy (for alignment).
Currently, NXenergydispersion also supports
fixed
orsweep
as ways of scanning the energy (in energy_scan_mode).There are multiple ideas how to extend this description