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Detector

Several detector modalities, not one camera path. Design-phase; values are taken from the 7-BM docs or inferred.

The single biggest detector-side difference from the 2-BM micro-CT pilot is that 7-BM runs several detector modalities, chosen per technique. They are modelled in the detection stage of the descriptor. Two of them present the Sensor Role (a scalar or short-vector Reading, not a 2D frame), which the 2-BM camera path never needed.

The modalities

Device Family Role Notes (from the 7-BM docs)
Scintillator Scintillator (part of the imaging path) scintillator crystal for indirect x-ray imaging; cracks under prolonged white beam
TomographyCamera Camera Detector area camera coupled to the scintillator through visible optics, for tomography and radiographic imaging
HighSpeedCamera Camera Detector high-speed movie camera (Photron Nova S16 in the docs); chopper-gated movie bursts
Photodiode Photodiode (loose) Sensor PIN diode for time-resolved radiography; a scalar intensity Reading
EnergyDispersiveSpectrometer EnergyDispersiveSpectrometer Sensor germanium energy-dispersive detector; a per-photon energy spectrum

How each maps onto CORA

  • Tomography (camera). The scintillator-plus-visible-optics-plus-area-camera path is the same shape as 2-BM. It reuses the Scintillator and Camera Families and the Detector Role, and could later compose the cross-facility Microscope Assembly. No new shape.
  • High-speed imaging (movie camera). Still a Camera presenting the Detector Role. What is new is the acquisition: short movie bursts, one per chopper opening, hardware-gated by the DG645 timing chain and optionally ring-synced at 271 kHz. That is a new acquisition Method and a Run / Dataset question (is one burst one Run, the N-sequence set one Campaign, and how are top-up-blanked frames represented), not a new detector Family (HSI-1).
  • Radiography (point photodiode). A PIN photodiode reads transmitted intensity as a scalar time series, read out through a high-speed digitizer (ADQ14) or oscilloscope plus the DataGrabber program. The Role is settled (Sensor); the digitizer, scope, and DataGrabber stay on the floor. What is open is the detector Family and whether one trace is one Dataset (RAD-1).
  • Energy-dispersive diffraction (germanium detector). A germanium detector records the energy of each absorbed photon, an MCA spectrum transformed to scattering vector by Bragg's Law. It presents the Sensor Role (a short-vector Reading) and binds the catalog EnergyDispersiveSpectrometer Family (graduated once 2-ID and 7-BM shared it). What is open is whether it is the same physical detector as the fluorescence MCA (DET-1).

Families

The imaging path reuses Scintillator and Camera. The energy-dispersive detector binds the catalog EnergyDispersiveSpectrometer Family (graduated once 2-ID and 7-BM shared it), the first to fill the Sensor Role with a science detector. The Photodiode point detector is still a loose family presenting the existing Sensor Role, rendered as plain text; whether it is earned into the catalog or stays a deployment-local Sensor device is settled when staff confirm it and the naming review weighs in. This is the same loose-binding pattern 2-BM uses for its uncatalogued Diagnostic and BeamPositionMonitor Sensor devices.

The detector data units, the energy-dispersive detector identity, and the camera models are the main detector-side open questions. See Inventory for the Asset tree.