20 research outputs found
Absolute Intensitätskalibrierung des XUV/VUV Übersichts-Spektrometersystems HEXOS für Wendelstein
High efficiency extreme ultraviolet overview spectrometer: Construction and laboratory testing
The new high efficiency extreme ultraviolet overview spectrometer system (HEXOS) has been developed to study impurity concentrations and impurity transport properties in the plasma of the stellarator W7-X. The HEXOS system consists of four different grating based spectrometers, which provide large etendue and good spectral resolution over a broad wavelength range (2.5-160 nm, divided into four subsections with some overlapping ). The mechanical arrangement as two double spectrometers allows for a compact installation geometry on W7-X. Laboratory testing and wavelength and intensity calibrations have been performed using a dc hollow cathode discharge (24-150 nm) and a pinch discharge (2.5-30 nm). (c) 2006 American Institute of Physics