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 min during the experiment. The relative detector positions can be monitored with a precision of better than ± 60 μm (1σ).
|Number of pages||6|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 1998 Jul 1|
- Fresnel zone plate
- Tracking detector
ASJC Scopus subject areas
- Nuclear and High Energy Physics