✦ LIBER ✦

The laser calibration system of the HARP TOF

✍ Scribed by A. Andreoni; M. Bondani; M. Bonesini; F. Ferri; D. Gibin; P. Govoni; A. Guglielmi; A. Menegolli; M. Paganoni; F. Paleari; A. Parravicini; A. Sottocornola-Spinelli; A. Tonazzo

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 487 KB
Volume: 125
Category: Article
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)90962-5

No coin nor oath required. For personal study only.

✦ Synopsis

The calibration and monitoring system constructed for the HARP experiment scintillator-based time of flight system is described. It is based on a Nd-Yag laser with passive Q-switch and active/passive mode-locking, with a custom made laser light injection system based on a bundle of IR monomode optical fibers. A novel ultrafast InGaAs MSM photodiode, with 30 ps risetime, has been used for the laser pulse timing The first results from the 2001-2002 data taking are presented, showing that drifts in timing down to about 70 ps can be traced.

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