TITLE

Time-resolving multispatial grazing incidence spectrograph for plasma fusion diagnostics (abstract)

AUTHOR(S)
Nudelfuden, A.; Moos, H. W.; Lippmann, S.
PUB. DATE
May 1985
SOURCE
Review of Scientific Instruments;May85, Vol. 56 Issue 5, p869
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A grazing incidence spectrograph which operates in the EUV (40 to 350 Å) that has multispectral, temporal, and spatial resolving capabilities is being constructed for plasma fusion diagnostics. The spectrograph achieves a simultaneous spectral coverage of 20 and 60 Å when centered on 40 and 350 Å, respectively, with ∼1-Å resolution. The detector consists of an image intensifier fiber optically coupled to 3 area array detectors (CCDS), which can be read out in 5 ms, thereby determining the time resolution of the instrument. The spatial resolution is accomplished by using the astigmatism inherent to a concave grating in grazing incidence, coupled with the pinhole camera effect produced by an entrance slit of limited height. The spectrograph can view ∼54 cm of plasma which is 2 m away from the entrance slit with 4- and 8-cm resolution at 350 and 40 Å, respectively. We will present the results of a feasibility study, the spectrograph design, and the results of the data reduction and interpretation codes which are under development.
ACCESSION #
9785323

 

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