Detector¶
The imaging detector: a scintillator-relay-camera system. PVs verified against startup/10-area-detector.py.
The magnified transmitted image lands on a scintillator, which converts X-rays to visible light that a camera records. The structure is the same scintillator-relay anatomy as 2-BM's microscope; FXI's magnification comes from the zone plate rather than a microscope objective turret.
The imaging path¶
| Element | Family | PV | Notes |
|---|---|---|---|
Scintillator (scint) |
Scintillator | XF:18IDB-OP{Det:Lens |
scintillator-relay lens stage (X/Y/Z); material and thickness pending (DET-1) |
Detector support (DetU/DetD) |
LinearStage | (prefix pending, DET-2) | X/Y/Z rails; DetU.z is the sample-to-detector propagation distance |
| Camera | Camera | XF:18ID1-ES{Kinetix-Det:1} |
the live imaging detector (Photometrics Kinetix) |
The camera roster¶
Source instantiates several camera classes; CORA models one detector position until staff confirm which are physically installed and active (CAM-1).
| Instance | Class | PV | Status |
|---|---|---|---|
KinetixU |
Photometrics Kinetix | XF:18ID1-ES{Kinetix-Det:1} |
the active instance; the modeled camera |
KinetixD |
Photometrics Kinetix | XF:18ID1-ES{Kinetix-Det:1} |
placeholder, same PVs as KinetixU (source comment) |
MaranaU / MaranaD |
Andor Marana | XF:18IDB-ES{Det:Marana1} |
both share one PV (placeholder pair) |
Andor |
Andor Neo2 | XF:18IDB-BI{Det:Neo2} |
present in source |
detA1 |
Manta | XF:18IDB-BI{Det:A1} |
area camera |
Because the U/D pairs share identical PVs, registering two camera Assets per pair would be modelling the same hardware twice; CORA holds one position. Kinetix 22 mm vs 29 mm is distinguished at runtime by max_size_x (2400 vs 3200). The readout-config keys (KINETIX, KINETIX22, MARANA-4BV6X, SONA-4BV6X) are literal in source; vendor part numbers are inferred from class names and pending (CAM-2). An Oryx camera (XF:18IDB-ES{Det:Oryx1}) is commented out and recorded as decommissioned.
Magnification¶
The total magnification is a computed axis:
with the visible-light-microscope factor VLM = 10 (GLOBAL_VLM_MAG, startup/20-global_param.py). It is derived from two real Z positions (the detector support DetU.z and the zone-plate zp.z) and has no PV of its own. The energy-change move (move_zp_ccd_xh, see Recipes) co-moves the zone plate and detector to hold magnification constant across energy.