H. Menjo

Performance of the Arm#1 Detector for LHCf Experiment

The Large Hadron Collider forward (LHCf) experiment will provide the energy and transverse momentum spectra of neutral particles produced in the very forward region of p-p collision at 7+7 TeV, corresponding to a laboratory frame energy of 10 17 eV. The LHCf apparatus is composed of two independent detectors installed at zero degree collision angle from the ATLAS interaction point. To assess performance of LHCf detectors, we carried out a beam test in 2007 at the CERN SPS H4 beamline. We report results of the Arm#1 detector, using scintillating fibers for measuring shower positions, obtained from electron primary beams of 50–200 GeV, and proton primary beams of 150–350 GeV and muon primary beams of 150–200 GeV. We obtained energy resolution of electrons as a function of the primary energy . The position resolution of shower axis is obtained by using a position determined with the Si microstrip detectors. We also reconstructed the real geometry of each SciFi by the use of muon primary beams. Finally, we re...

LHCf: A calibration tool for cosmic ray physics at LHC

The LHCf detector has been designed to measure the energy spectra of γ, π 0 and neutrons produced very forward in the proton-proton collisions at LHC, with 14 TeV center of mass energy. The equivalent energy in the laboratory system (10 17 eV) will allow significant improvement in knowledge of the mechanisms important for longitudinal development of Very High Energy Cosmic Ray (VHECR) showers, in a region never directly explored. This paper reports on the status and expected performances of the LHCf experiment, which is ready for the data taking in the very first phase of the LHC running.

Status of the LHCf experiment

The LHCf experiment is an LHC experiment dedicated to measure the production spectra of forward neutral particles, photons, π0’s, and neutrons. The aim of the LHCf is to provide critical data to test and tune hadronic interaction models which are used in MC simulations for cosmic-ray air shower developments. The LHCf had an operation in 2015 with pp collisions at

First year results from LHCf

\sqrt{s}

The status and preliminary results of the LHC forward experiment: LHCf

= 13 TeV, which corresponds to the collision energy of

LHCf: calibration of hadron interaction models for high energy cosmic‐ray physics at the LHC energy

0.9×10^{17}

The performance of LHCf detector

eV in the laboratory frame. The resent results of the LH√Cf, the inclusive energy spectra for forward photons and neutrons obtained with pp collisions at

The LHCf detector at the CERN Large Hadron Collider

\sqrt{s}

Performance of the prototype detector for the LHCf experiment

= 13 TeV, are presented. In addition, future prospects of LHCf analyses and activities are reviewed.

Technical design report of the LHCf experiment: Measurement of photons and neutral pions in the very forward region of LHC

We give a brief description of the purpose of the LHCf experiment, detectors and their performance, and what has been done in the first year experiment. A short summary of results at s = 900 GeV is given although the energy is not an “intrinsic” LHC energy. Since detailed results at s = 7 TeV will appear soon elsewhere, here we limit ourselves to giving also a brief account of what will come in that paper.