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The multimode optical fiber and the 5 um slit have slipped out of alignment.  OSELOTS requires manual realignment. 

 

POSSIBLE SOLUTION(S): 

Be warned, this is a ~1 hour process.  We are working on designing a more user-friendly repair process.  Here are the steps (somewhat difficult to describe in text): 

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Only one 

  1. Remove the rubber baffle around the cage system connecting slit to central column
    1. Unwraps by hand 
    2. Not shown in photo below
  2. Use a small, imperial hex key to just loosen (DO NOT REMOVE ALL THE WAY) the small screws locking the cage into the central column 
    1. In the hex key set provided with the OSELOTS toolkit, the key you need is the small, red imperial key
  3. Disconnect the slit holder from the support post, just to the right of the entrance hole
    1. We recommend unscrewing the small, horizontal, silver beam from the holder of the optical slit, keeping the larger poster pieces in place
    2. You should first loosen the screw locking this silver post in place, and then rotate it
  4. Slide the cage posts holding the slit and fiber tip out the front hole of OSELOTS
    1. If all the screws have been appropriately loosened, the whole front of the cage system should cleanly slide out.
  5. Connect a light source (like the HG-2 calibration lamp) to lens-end of the optical fiber
    1. See