title: High throughput spectrometer for fast localized Doppler measurements.
abstract: A new custom-built duo spectrometer has been commissioned for fast localized Doppler measurements of plasma ions in the Madison Symmetric Torus. The instrument combines very high optical throughput (transmission efficiency of 6% and etendue of 0.80 mm(2) sr divided into two simultaneous measurements) with good resolution (lambda/Deltalambda=5600). The design is a double grating variant of the Czerny-Turner layout and has been carefully optimized for fast (100 kHz) measurements of the C VI line at 343.4 nm. The instrument is currently being applied for high speed charge exchange recombination spectroscopy measurements.
authors.affiliation: The Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, 1150 University Avenue, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: D
authors.initials: D
authors.lastname: Craig
authors.forename: D J
authors.initials: DJ
authors.lastname: Den Hartog
authors.forename: D A
authors.initials: DA
authors.lastname: Ennis
authors.forename: S
authors.initials: S
authors.lastname: Gangadhara
authors.forename: D
authors.initials: D
authors.lastname: Holly
mesh_terms: D004301:Doppler Effect; D007477:Ions / Q000032:analysis*; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods
chemical_list: D007477:Ions