Detector¶
The coherent area detectors for XPCS and scattering, the SAXS detector positioner and beamstop, the flux counter, the occasional fluorescence detector, and the beam-viewing cameras. PVs verified against startup/20-area-detectors.py, 10-optics.py, 26-scalers.py, 98-xspress3.py.
Enclosure: 11-ID-B.
Note
CHX's measurement lives on its area detectors: the Eiger captures the coherent speckle time series (XPCS) or the static scattering pattern (SAXS/WAXS). The detector positioner centers the detector transversely on the scattered beam and the beamstop blocks the direct beam. All reuse existing families. Which Eiger is primary versus the spare set is a staff question (DET-1).
| Name | Family | PV | Key specs | Replaceable | Status |
|---|---|---|---|---|---|
Eiger4M |
Camera |
XF:11IDB-ES{Det:Eig4M} |
Eiger 4M pixel detector (eiger4m), the primary XPCS / scattering detector; fast-trigger gated for speckle time series. Reuses Camera. | confirm |
|
Eiger1M |
Camera |
XF:11IDB-ES{Det:Eig1M} |
Eiger 1M pixel detector (eiger1m); reuses Camera. | confirm |
|
Eiger500K |
Camera |
XF:11IDB-ES{Det:Eig500K} |
Eiger 500K pixel detector (eiger500k); reuses Camera. | confirm |
|
SAXSDetectorStage |
LinearStage |
XF:11IDB-ES{Det:SAXS-Ax: |
Detector positioner (saxs_detector, class XYMotor: X/Y only) centering the area detector transversely on the scattered beam. Whether a separate along-beam stage sets the sample-to-detector distance (and hence the q-range) is not in source; routed to DET-1. | confirm |
|
SAXSBeamStop |
BeamStop |
XF:11IDB-ES{BS:SAXS-Ax: |
SAXS beamstop (saxs_bst, class SAXSBeamStop) blocking the direct beam ahead of the detector; reuses BeamStop. | confirm |
|
FluxCounter |
FluxMonitor |
XF:11IDB-ES{Sclr:1} |
Scaler-counted ion-chamber / diode flux channels (I0 and others) for normalization; reuses FluxMonitor (graduated #353). Channel map pending (DIAG-1). | confirm |
|
FluorescenceSpectrometer |
EnergyDispersiveSpectrometer |
XF:11IDB-ES{Xsp:1}: |
Xspress3 energy-dispersive detector (the mca.xs component, class CHXXspress3Detector) for occasional element-sensitive / anomalous work; reuses EnergyDispersiveSpectrometer (graduated #345). Element count pending (DET-1). | confirm |
|
BeamViewingCamera |
Camera |
XF:11IDB-BI{Cam:10} |
Prosilica on-axis beam-viewing camera (OAV); x-ray-eye Prosilicas (xray_eye1-4) and a PointGrey (BCam) serve alignment views. Reuses Camera. Live set pending (CAM-1). | confirm |