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Beam tracker

For conic beam, a beam tracker can be setup.

It is split into 2.

  • The beam tracker, which handle the modelization of the beam
  • The beam tracker calc controller which controller the tracker axis

Software architecture

modelization

The bean tracker have to be setup with sy_angle, sz_angle in radian.

The focal_position for the sample stage have to be setup independently.

From this information, the beam tracker is able to update the detector center automatically to follow the actual position of the sample stage.

Configuration

controller:
  - package: tomo.controllers.beam_tracker
    class: BeamTracker
    name: tomo_beam_tracker
    plugin: generic

controller:
  - package: tomo.controllers.beam_tracker
    class: BeamTrackerCalcController
    beam_tracker: $tomo_beam_tracker
    plugin: generic

    axes:
      # sample stage
      - name: $sx
        tags: real sx
      - name: $sy
        tags: real sy
      - name: $sz
        tags: real sz

      # beam tracking
      - name: sxbeam
        tags: sxbeam

- name: tomo_config
  plugin: bliss
  class: TomoConfig
  package: tomo.controllers.tomo_config

  ...

  # Contains information from the location of the beam.
  # This is used to track the sample with the beam
  beam_tracker: $tomo_beam_tracker

  # Axis with the same role as x-axis, but compensating y and z to follow
  # the beam with the sample
  tracked_translation_x: $sxbeam

Use

# Move with the beam tracker
umv(sxbeam, 10)