A precise calibration and monitoring system has been developed for the HARP experiment scintillator-based time of flight system. An Nd-Yag laser with passive Q-switch and active/passive mode-locking and a custom-made laser light injection system based on a bundle of IR monomode optical fibers were used. The laser pulse timing was provided by a novel ultrafast InGaAs MSM photodiode, with 30 ps risetime. Experience over a several month data taking period in 2001 and 2002 shows that drifts in timing down to about 70 ps can be traced.
LASER-BASED CALIBRATION FOR THE HARP TIME OF FLIGHT SYSTEM
GIBIN, DANIELE;
2003
Abstract
A precise calibration and monitoring system has been developed for the HARP experiment scintillator-based time of flight system. An Nd-Yag laser with passive Q-switch and active/passive mode-locking and a custom-made laser light injection system based on a bundle of IR monomode optical fibers were used. The laser pulse timing was provided by a novel ultrafast InGaAs MSM photodiode, with 30 ps risetime. Experience over a several month data taking period in 2001 and 2002 shows that drifts in timing down to about 70 ps can be traced.File in questo prodotto:
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