Abstract
The photometric calibration of an extreme ultraviolet flat field spectrometer has been done at the Advanced Light Source at Lawrence Berkeley National Laboratory. This spectrometer is used to record spectrum for atomic physics research from highly charged ions in plasmas created in the Livermore electron beam ion traps EBIT-I and SuperEBIT. Two calibrations were done each with a different gold-coated grating, a 1200 l/mm and a 2400 l/mm, that covered 75–300 Å and 15–160 Å, respectively. The detector for this calibration was a back thinned charge coupled device. The relative calibration was determined for several different incident angles for both gratings. Within the scatter of the data, the calibration was roughly insensitive to the incidence angle for the range of angles investigated.
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