A stigmatic spectrometer for the 2.5-40 nm EUV region has been realized. The design consists of a grazing-incidence spherical variable-line-spaced grating with flat-field properties and of a spherical mirror mounted in the Kirkpatrick-Baez configuration that compensates for the astigmatism. The spectrum is acquired on a fluorescent screen and intensified CCD detector, that can be moved along the spectral focal curve to select the spectral region to be acquired. The spectral and spatial resolution of the system have been characterized by using the emission from an hollow-cathode lamp and a laser-produced plasma. At present, the instrument is installed at the VUV-FEL at DESY for the spectral monitoring of the FEL beam in the 20-45 nm region.
Grazing-incidence spectrometer for the monitoring of the VUVFEL beam at DESY
Poletto, L;Pelizzo, MG;Zambolin, P;
2004
Abstract
A stigmatic spectrometer for the 2.5-40 nm EUV region has been realized. The design consists of a grazing-incidence spherical variable-line-spaced grating with flat-field properties and of a spherical mirror mounted in the Kirkpatrick-Baez configuration that compensates for the astigmatism. The spectrum is acquired on a fluorescent screen and intensified CCD detector, that can be moved along the spectral focal curve to select the spectral region to be acquired. The spectral and spatial resolution of the system have been characterized by using the emission from an hollow-cathode lamp and a laser-produced plasma. At present, the instrument is installed at the VUV-FEL at DESY for the spectral monitoring of the FEL beam in the 20-45 nm region.Pubblicazioni consigliate
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