FUV Grating Performance for the Cosmic Origins Spectrograph

摘要

The Cosimic Origins Spectrograph (COS) will be the most sensitive UV spectrograph to be flown aboard the Hubble Space Telescope. the COS FUV and NUV channels will provide high sensitivity at resolution greater than 20000 over wavelengths ranging from 115nm to 320nm. We present a brief review of the instrument design and grating test plan as well optical test results for the first FUV grating delivered.