Detector¶
The detectors that make SST multi-technique. PVs verified against the RSoXS, HAXPES, and NEXAFS TOML device manifests.
SST's three technique families show up in its detectors: which one is read decides whether the measurement is soft-X-ray scattering, photoemission, or energy-resolved absorption.
| Asset | Family | PV | Technique it serves |
|---|---|---|---|
ScatteringDetector |
Camera | XF:07ID1-ES:1{GE:2} |
RSoXS soft-X-ray scattering |
ElectronAnalyzer |
ElectronAnalyzer | XF:07ID-ES-SES |
HAXPES photoemission |
CalorimeterSpectrometer |
EnergyDispersiveSpectrometer | XF:07ID-ES{UCAL}: |
NEXAFS energy-resolved fluorescence |
FluxMonitor |
FluxMonitor | XF:07ID-ES1{DMR:I400-1} |
I0 / drain-current normalization |
BeamStop |
BeamStop | XF:07ID2-ES1{BS-Ax:1} |
blocks the RSoXS direct beam |
SampleCamera |
Camera | XF:07ID1-ES:1{Scr:4} |
on-axis sample viewing |
Three detectors, three techniques¶
The ScatteringDetector is a Greateyes 4k x 4k CCD reading the soft-X-ray scattering pattern (a second SAXS-arm Greateyes is commented out in source, DET-1); it reuses Camera. The CalorimeterSpectrometer is a transition-edge-sensor (TES) microcalorimeter reading energy-resolved fluorescence for NEXAFS; it resolves photon energy per event to give a spectrum, so it reuses EnergyDispersiveSpectrometer (whether a cryogenic microcalorimeter is a per-Asset settings variant of that family, alongside the silicon-drift and germanium variants, or warrants its own Family is a question; carried as reuse for now). Absorption is also read as drain current and partial electron yield through the SR570 / ADC flux channels.
The electron analyzer: a graduation¶
The ElectronAnalyzer is the HAXPES Scienta SES hemispherical electron analyzer (pass energy, lens mode, kinetic / excitation energy, acquisition mode). It is a photon-in / electron-out device that fits no photon-detector family, so it binds the ElectronAnalyzer family that NSLS-II ESM introduced. SST-HAXPES is the second sighting of that family, the same Scienta SES analyzer type as ESM, so it earned the rule-of-three; the abstraction is settled (a hemispherical electron analyzer is a distinct, recurring device class), so it GRADUATED into the catalog (ARPES-1), ESM's references swept alongside. The flux channels reuse FluxMonitor (graduated in #353); the beamstop reuses BeamStop.