Transmission grating based extreme ultraviolet imaging spectrometer for time and space resolved impurity measurements |
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| Authors: | Kumar Deepak Stutman Dan Tritz Kevin Finkenthal Michael Tarrio Charles Grantham Steven |
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| Affiliation: | Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, USA. deepak@pha.jhu.edu |
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| Abstract: | 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 A? 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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