Pol He-3 Rotation Stages

Pol He-3 Rotation Stages

The camera snapshots are to roughly verify that the rotation stages are where we think they are.
This is done by looking at the relative location of the marks outlined in red.  One mark is on 
the rotating portion, the second on a fixed part of the rotation stage.

Rotation Stage Control

• Bring up the rotation stage controls:

go_polhe3_rotation-stage

Rotation Stage Controls

Power to camera and lamp in Optics Box

• Use Outlet 8 on Hcreboot7

Note that the camera must be ON

Note that the camera is sensitive to the laser light as well.
Try turning off all but one laser and adjusting the power until you can clearly see the marks
noted on the images in the snapshots.

Snapshots

Feb 17 2020 snapshots before fine tuning

• These snapshots were taken after the rotation stages were installed in the longitudinal laser path and re-aligned in the Hall
• Rotation stage angles:
  • Upper-left: Longitundinal left 2  : 325.5
  • Bottom-left: longitudinal left : 263.0
  • Upper-right: longitudinal right 2 : 8.80
  • Bottom-right: longitudinal right : 0.00