Absolute Calibration Of An Xuv Time Resolving Spectrograph

A time resolving XUV spectrograph has been developed for x-ray laser research. A grazing incidence flat field grating is coupled to a soft x-ray streak camera to provide high temporal resolution over a large spectral range. Wavelengths between 50 Å and 400 A are focused onto a flat field, allowing detectors to be easily coupled to the spectrograph. Time resolved spectra covering any ''100 A window within flat field can be recorded using a streak camera. The spectrograph and detector were absolutely calibrated in the XUV spectral region using synchrotron radiation. The instrument and its characterization will be described. The wavelength range of the spectrograph has been extended to approximately 11 R through the use of a higher periodicity flat field grating. Preliminary spectroscopic results will be presented.