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The adjusters must achieve a resolution of 10 μrad and a range of 1 mrad to satisfy the NFIRAOS requirements for laser guide star stability on the wavefront sensors. The adjuster design has many unknowns so a prototype of these adjusters was developed and tested to determine the best design and material selection for use in NLGS. It was found that, although the resolution is unpredictable, the designed adjuster can meet the NFIRAOS requirements with feedback from the optical alignment system. It was also found that material selection and grease are very important to prevent seizing of the adjusters. The results from testing will be used to improve upon the current NLGS adjuster design.
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