Specification for goniometer mount for radiators

• accuracy of translational motion:

      vertical:                     200 um
      horizontal (bottom axis):     200 um
      target ladder (fine tuning):   25 um

• accuracy of rotational motion:

      yaw (about vert.axis):                   1.0 urad
      pitch (about horizontal, perp. to beam): 1.0 urad
      roll (about beam direction):             1.5 urad

End switches required for all axes, additional home switches for rotations.

Target ladder is positioned in the center of the craddle (roll) and should move over 8 cm (space for mounts of 5 diamonds and thin foil for normalization run).