Author/Authors :
Costa، نويسنده , , S. and Dalla Torre، نويسنده , , S. and Faso، نويسنده , , D. and Gayde، نويسنده , , J-Ch. and Latina، نويسنده , , A. and Tessarotto، نويسنده , , F.، نويسنده ,
Abstract :
A method is proposed for the angular alignment of RICH mirrors and for its monitoring, in particular for the COMPASS RICH-1 mirror system. Observing (by means of four cameras) apparent discontinuities in the images of continuous linear objects reflected by the mirrors surface, a relative misalignment of adjacent mirrors can be deduced and then corrected. The method can attain a sensitivity of at least 0.1 mrad, and can also be applied on-line to keep under control the stability of the mirrors during data taking.
