Detector¶
The large flat-panel and pixel area detectors for total scattering / PDF, the two detector towers that set the near and far distances, the beamstops, and the flux monitor. PVs verified against startup/80-areadetector2.py, 81-pilatus.py, 72-two-detector.py, 11-motors.py, 10-machine.py.
Enclosure: 28-ID-1-B.
Note
PDF's measurement is the total-scattering pattern on a large area detector. To reach the high Q a pair distribution function needs, the detector sits close; a near panel and a far panel are merged across two distances. The two detector towers move the panels in and out, the explicit two-detector acquisition (DIST-1). All reuse existing families. Which panels are live versus the spare set is DET-1.
| Name | Family | PV | Key specs | Replaceable | Status |
|---|---|---|---|---|---|
AreaDetector |
Camera |
XF:28ID1-ES{Det:PE1} |
PerkinElmer flat-panel area detector (class PerkinElmerStandard, instance pe1; a second panel pe2 at Det:PE2). The primary total-scattering / powder detector; reuses Camera. | confirm |
|
PixelDetector |
Camera |
XF:28ID1-ES{Det:Pilatus} |
Pilatus photon-counting pixel detector (class PilatusV33, instance pilatus-1) with an energy-thresholded readout, used alongside the flat panels for high-Q / low-background frames; reuses Camera. Which detector serves which distance is DET-1 / DIST-1. | confirm |
|
DetectorStage1 |
LinearStage |
XF:28ID1B-ES{Det:1-Ax: |
First detector tower (Det_1_X / Det_1_Y / Det_1_Z): the Z axis sets the sample-to-detector distance and hence the accessible Q. In the two-detector acquisition this is the static panel. Reuses LinearStage. | confirm |
|
DetectorStage2 |
LinearStage |
XF:28ID1B-ES{Det:2-Ax: |
Second detector tower (Det_2_X / Det_2_Y / Det_2_Z): the moving panel that steps in and out of the beam for the near / far two-distance merge (the TwoDetectors plan, 72-two-detector.py). Reuses LinearStage; the two-distance geometry is DIST-1. | confirm |
|
BeamStop |
BeamStop |
XF:28ID1B-ES{BS:1-Ax: |
Direct-beam stop (class BeamStop, instance BStop1, X / Y); a second beamstop (BStop2, BS:2) and a table-mounted stop sit alongside, one per detector distance. Reuses the BeamStop family. | confirm |
|
FluxMonitor |
FluxMonitor |
XF:28ID1B-OP{Det:1-Det:2}Amp:bkgnd |
Background photodiode (photodiode) reading incident-flux / background for normalization; reuses FluxMonitor (graduated #353). Channel detail pending (DIAG-1). | confirm |