Gratings

Three gratings are installed in LUCIFER. All of them were tested for their efficiencies by the manufacturer. The company measured in a Littrow setup. LUCIFER reaches about 90% ([FDR-OP]) of the nominal efficiencies because it is not working under Littrow conditions. See Appendix B for the plots and ASCII-files.

• High-Dispersion grating (HD-grating) with 210l/mm.
• H+K-grating with 200l/mm
• Ks-grating with 150l/mm