A high Precision Laser Alignment Monitoring System for HERMES Tracking Detectors
نویسندگان
چکیده
A high precision alignment system has been developed for online monitoring of the tracking detectors of HERMES. The system consists of a He-Ne laser, Fresnel zone plates, CCD cameras, and electronics to read out the image. It records the alignment information of each detector automatically every 30 minutes during the experiment. The relative detector positions can be monitored with a precision of better than 60 m (1 ). PACS: 29.40, 29.40.G, 42.62, 42.79.C
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