Speaker
Description
The SND@LHC experiment has been performed to detect high energy neutrinos produced in the forward direction at the LHC from 2022. This experiment can cover the unexplored ranges of energy (100 GeV-TeV) and pseudo-rapidity (7.2-8.4), in which a large fraction of neutrinos originate from charmed hadrons decays. The forward produced neutrinos along the beam axis make collisions with the Emulsion Cloud Chamber (ECC) target located 480 m away from the IP1 of ATLAS detector. Here, the ECC is a sandwich structure of Nuclear emulsion films and Tungsten plates, and it plays roles of target and detector. All three flavors of neutrinos can be observed by using the ECC together with muon detector. Especially, since Nuclear emulsion has best spatial resolution less than 1 μm and angular resolution with several mrad, tau neutrinos can be identified in the ECC. We had observed the LHC neutrinos for the first time in 2023. In order to observe these neutrino events, we are currently scanning the Nuclear emulsion films by using the world-fastest automatic readout system "HTS2“ (Hyper Track Selector 2) which has been developed by Nagoya emulsion group. In this presentation, we will introduce how to do data taking and processing by the Emulsion scanning using this system.