CNGS beam monitor with the LVD detector

Details CNGS beam monitor with the LVD detector CNGS beam monitor with the LVD detector

2003-04-11

arxiv.org/abs/hep-ex/0304018v1

Nucl.Instrum.Meth. A516 (2004) 96-103

Physics

High Energy Physics

High Energy Physics - Experiment

15 pages, 11 figures, submitted to Nucl. Instr. Meth. Phys. Res. A

Scientific paper

10.1016/j.nima.2003.07.068

The importance of an adequate CNGS beam monitor at the Gran Sasso Laboratory has been stressed in many papers. Since the number of internal $\nu_\mu$ CC and NC interactions in the various detectors will not allow to collect statistics rapidly, one should also be able to detect the $\nu_\mu$ CC interactions in the upstream rock. In this study we have investigated the performances of the LVD detector as a monitor for the CNGS neutrino beam. Thanks to its wide area ($13 \times 11 m^2$ orthogonal to the beam direction) LVD can detect about 120 muons per day originated by $\nu_\mu$ CC interactions in the rock. The LVD total mass is $\sim2 kt$. This allows to get 30 more CNGS events per day as internal $(NC + CC)$ $\nu_\mu$ interactions, for a total of $\sim 150$ events per day. A 3% statistical error can be reached in 7 days. Taking into account the time characteristics of the CNGS beam, the cosmic muon background can be reduced to a negligible level, of the order of 1.5 events per day.

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