next up previous
Next: Prevention of Photocathode Damage Up: Payload System Improvements Previous: New Camera Electronics

8.2.3 Echelle Grating Stabilization

  To overcome the stickiness in the grating tilt bearing that was the source of the random jumps in our spectra when they should have been motionless (§6.1.4), we plan to replace the Vespel journal bearings with flex pivots. Installing a suspension that relies on torsion instead of slippage should bring about a considerable improvement in mechanical smoothness and stability.