Title of article
Experience with the UHV box coater and the evaporation procedure for VUV reflective coatings on the HADES RICH mirror
Author/Authors
Maier-Komor، نويسنده , , P. and Gernhنuser، نويسنده , , R. and Wieser، نويسنده , , J. and Ulrich، نويسنده , , A.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1999
Pages
11
From page
152
To page
162
Abstract
An UHV box coater was set up for the deposition of highly reflective layers in the vacuum ultraviolet (VUV) wavelength range on large-area mirror substrates. The VUV mirrors are needed for the ring imaging Cherenkov (RICH) detector of the high-acceptance di-electron spectrometer (HADES). The complete dry vacuum system is described. The spatial deposition distribution from the evaporation sources was measured. The reflectivity of the Al mirror layer was optimized for the wavelength range of 145–210 nm by varying the thickness of the MgF2 protective layer. The setup for measuring the reflectivity in the VUV range is described and reflectivity data are presented.
Keywords
Resistance heated source , RICH-detector , Surface roughness , Titanium , VUV reflectivity , Electron beam evaporation , aluminum , Magnesium fluoride , Optical Measurements , Thickness by quartz crystal monitor
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
1999
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2184039
Link To Document