Illumination technique for the relative calibration of the ASTRI SST-2M camera
Abstract
We present a new illumination technique for the camera relative gain calibration of the ASTRI SST-2M Cherenkov telescope. The camera illumination is achieved by means of an optical fiber that diffuses the light inside a protective PMMA window above the focal plane. We report the encouraging results of the development tests carried out on two PMMA window prototypes illuminated by a standard optical fiber. We checked also the reliability of the method by a series of ray tracing simulations for different scattering models and PMMA window shapes finding good agreement with experimental results.
- Publication:
-
Nuclear Instruments and Methods in Physics Research A
- Pub Date:
- November 2014
- DOI:
- 10.1016/j.nima.2014.07.038
- Bibcode:
- 2014NIMPA.764..176R
- Keywords:
-
- Illumination;
- ASTRI SST-2M;
- Optical fiber;
- PMMA;
- MPPC