The calibration of the ICARUS photo-detection system employs a low power laser diode at 405 nm. The laser pulses are delivered in front of the 360 large area PMTs with a custom optical system, that has been recently upgraded to calibrate all of them in a single run, by replacing an optical switch with a custom optical splitter. The distribution of the PMTs’ signal arrival time has a distribution with a resolution better than 1 ns, thus allowing a good determination of the absolute event timing.
Bonesini, M., Benocci, R., Bertoni, R., Copello, S., Menegolli, A., Raselli, G., et al. (2024). The upgraded laser calibration system of the ICARUS experiment at FNAL. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 1067(October 2024) [10.1016/j.nima.2024.169670].
The upgraded laser calibration system of the ICARUS experiment at FNAL
Bonesini M.;Benocci R.;
2024
Abstract
The calibration of the ICARUS photo-detection system employs a low power laser diode at 405 nm. The laser pulses are delivered in front of the 360 large area PMTs with a custom optical system, that has been recently upgraded to calibrate all of them in a single run, by replacing an optical switch with a custom optical splitter. The distribution of the PMTs’ signal arrival time has a distribution with a resolution better than 1 ns, thus allowing a good determination of the absolute event timing.
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