Transmission grating based extreme ultraviolet imaging spectrometer for time and space resolved impurity measurements

Kumar, Deepak; Stutman, Dan; Tritz, Kevin; Finkenthal, Michael; Tarrio, Charles; Grantham, Steven
October 2010
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10E507
Academic Journal
A free standing transmission grating based imaging spectrometer in the extreme ultraviolet range has been developed for the National Spherical Torus Experiment (NSTX). The spectrometer operates in a survey mode covering the approximate spectral range from 30 to 700 Å and has a resolving capability of δλ/λ on the order of 3%. Initial results from space resolved impurity measurements from NSTX are described in this paper.


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