Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....7.2904d&link_type=abstract
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int
Physics
Scientific paper
The use of fiber optics instead of coaxial cable for signal transmission in atmospheric ˇCerenkov telescopes can reduce pulse dispersion and attenuation and so allow a shorter ADC gate to be used. Results indicate that the night sky background component could thus be significantly reduced. A prototype system of links is in use on the Whipple 10 m telescope and the performance has been assessed over more than a year of operation. The bandwidth is 150 MHz and the dynamic range of the output is from 2 mV to 1.0 V. The average gain of the 120 channels is 4.1 and is stable to within a few percent over a typical 3 week observation period. The baseline noise level is 0.5 mV rms but this can increase to 6 mV amplitude at certain resonance points in the value of the laser bias current. The deviation from true linearity is typically less than 7 %.
Bond I. H.
Bradbury S. M.
de La Calle Ignacio
Ogden P. A.
Rose Harry J. Jr.
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