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The beamline

The I11 beamline as the three stages the beam passes through, plus the controls that drive them. Design-phase.

Along the beam, in order, sit the three stages: the Source that delivers and conditions the beam, the Sample stage (the diffractometer, the thermal sample environment, and the robot), and the Detector. Cutting across all three are the Controls. Two access-gated hutches contain it: an optics hutch (the monochromator, slits) and an experiment hutch (the diffractometer, sample environment, robot, and detector). dodal records which functional zone each device is in, but not which hutch (ENC-1).

Stages

  • Source: the storage-ring state, the double-crystal monochromator, and the beam-defining slits.
  • Sample: the powder diffractometer (sample rotation + detector-arm angles), the capillary spinner for powder averaging, the four thermal actuators (the variable-temperature environment that earns the TemperatureController abstraction), and the sample-changing robot + carousel.
  • Detector: the Mythen3 position-sensitive strip detector.

Shared

  • Controls: the Diamond EPICS control stack (with the real dodal PV handles).
  • Resources: the continuously-available supplies (photon beam, cooling water, vacuum); carried in the descriptor.

Reference

  • Inventory: the full planned CORA Asset model (every device by parent_id, with Families, the dodal control handles, and pending confirmations). The TemperatureController graduation + settable-actuator Role earn landed via a separate gate-reviewed change (TEMP-1): it is now a catalog Family presenting Regulator.