Trigger and background study for the LHCf experiment

K. Taki, O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, K. Fukui, M. Haguenauer, Y. Itow, K. Kasahara, D. Macina, T. Mase, Y. Matsubara, H. Menjo, M. Mizuishi, Y. Muraki, M. Nakai, P. Papini, K. Masuda, A. L. PerrotS. Ricciarini, T. Sako, Y. Shimizu, T. Tamura, Shoji Torii, A. Tricomi, W. C. Turner, A. Viciani, K. Yoshida

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We studied the effects of background in the LHCf experiment by MC simulation. An important source of background is given by particles colliding with the inner wall of the beam pipe after they are generated in a proton-proton collision. Because the energies of these particles are less than 100 GeV, they can be reduced at the trigger level. The MC simulations have shown that a signal-tonoise ratio of 1.2% can be achieved. These number can be reduced further in the analysis. Another source of the background is the particles generated in collisions between the beam and the residual gas in the beam pipe. Because the particles are emitted only in the direction of the beam, these backgrounds could be reduced with the coincidence of detectors at both sides of the interaction point. As the detection efficiency of a single calorimeter is only ∼ 15%, the coincidence condition reduces the efficiency down to ∼ 3%. It is the 20% of events by single Arm calorimeter. To solve this problem, we developed additional detectors that have wide aperture and high detection efficiency, called Front Counter. By using the Front Counter signal in the coincidence condition, we can keep ∼ 60% of the single side events but reduce the beam-gas background at the negligible level.

    Original languageEnglish
    Title of host publication31st International Cosmic Ray Conference, ICRC 2009
    PublisherUniversity of Lodz
    Publication statusPublished - 2009
    Event31st International Cosmic Ray Conference, ICRC 2009 - Lodz
    Duration: 2009 Jul 72009 Jul 15

    Other

    Other31st International Cosmic Ray Conference, ICRC 2009
    CityLodz
    Period09/7/709/7/15

    Fingerprint

    actuators
    calorimeters
    counters
    collisions
    protons
    residual gas
    detectors
    simulation
    apertures
    gases
    interactions
    energy

    Keywords

    • Background
    • LHC
    • Trigger

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Taki, K., Adriani, O., Bonechi, L., Bongi, M., Castellini, G., D'Alessandro, R., ... Yoshida, K. (2009). Trigger and background study for the LHCf experiment. In 31st International Cosmic Ray Conference, ICRC 2009 University of Lodz.

    Trigger and background study for the LHCf experiment. / Taki, K.; Adriani, O.; Bonechi, L.; Bongi, M.; Castellini, G.; D'Alessandro, R.; Fukui, K.; Haguenauer, M.; Itow, Y.; Kasahara, K.; Macina, D.; Mase, T.; Matsubara, Y.; Menjo, H.; Mizuishi, M.; Muraki, Y.; Nakai, M.; Papini, P.; Masuda, K.; Perrot, A. L.; Ricciarini, S.; Sako, T.; Shimizu, Y.; Tamura, T.; Torii, Shoji; Tricomi, A.; Turner, W. C.; Viciani, A.; Yoshida, K.

    31st International Cosmic Ray Conference, ICRC 2009. University of Lodz, 2009.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Taki, K, Adriani, O, Bonechi, L, Bongi, M, Castellini, G, D'Alessandro, R, Fukui, K, Haguenauer, M, Itow, Y, Kasahara, K, Macina, D, Mase, T, Matsubara, Y, Menjo, H, Mizuishi, M, Muraki, Y, Nakai, M, Papini, P, Masuda, K, Perrot, AL, Ricciarini, S, Sako, T, Shimizu, Y, Tamura, T, Torii, S, Tricomi, A, Turner, WC, Viciani, A & Yoshida, K 2009, Trigger and background study for the LHCf experiment. in 31st International Cosmic Ray Conference, ICRC 2009. University of Lodz, 31st International Cosmic Ray Conference, ICRC 2009, Lodz, 09/7/7.
    Taki K, Adriani O, Bonechi L, Bongi M, Castellini G, D'Alessandro R et al. Trigger and background study for the LHCf experiment. In 31st International Cosmic Ray Conference, ICRC 2009. University of Lodz. 2009
    Taki, K. ; Adriani, O. ; Bonechi, L. ; Bongi, M. ; Castellini, G. ; D'Alessandro, R. ; Fukui, K. ; Haguenauer, M. ; Itow, Y. ; Kasahara, K. ; Macina, D. ; Mase, T. ; Matsubara, Y. ; Menjo, H. ; Mizuishi, M. ; Muraki, Y. ; Nakai, M. ; Papini, P. ; Masuda, K. ; Perrot, A. L. ; Ricciarini, S. ; Sako, T. ; Shimizu, Y. ; Tamura, T. ; Torii, Shoji ; Tricomi, A. ; Turner, W. C. ; Viciani, A. ; Yoshida, K. / Trigger and background study for the LHCf experiment. 31st International Cosmic Ray Conference, ICRC 2009. University of Lodz, 2009.
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    title = "Trigger and background study for the LHCf experiment",
    abstract = "We studied the effects of background in the LHCf experiment by MC simulation. An important source of background is given by particles colliding with the inner wall of the beam pipe after they are generated in a proton-proton collision. Because the energies of these particles are less than 100 GeV, they can be reduced at the trigger level. The MC simulations have shown that a signal-tonoise ratio of 1.2{\%} can be achieved. These number can be reduced further in the analysis. Another source of the background is the particles generated in collisions between the beam and the residual gas in the beam pipe. Because the particles are emitted only in the direction of the beam, these backgrounds could be reduced with the coincidence of detectors at both sides of the interaction point. As the detection efficiency of a single calorimeter is only ∼ 15{\%}, the coincidence condition reduces the efficiency down to ∼ 3{\%}. It is the 20{\%} of events by single Arm calorimeter. To solve this problem, we developed additional detectors that have wide aperture and high detection efficiency, called Front Counter. By using the Front Counter signal in the coincidence condition, we can keep ∼ 60{\%} of the single side events but reduce the beam-gas background at the negligible level.",
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    author = "K. Taki and O. Adriani and L. Bonechi and M. Bongi and G. Castellini and R. D'Alessandro and K. Fukui and M. Haguenauer and Y. Itow and K. Kasahara and D. Macina and T. Mase and Y. Matsubara and H. Menjo and M. Mizuishi and Y. Muraki and M. Nakai and P. Papini and K. Masuda and Perrot, {A. L.} and S. Ricciarini and T. Sako and Y. Shimizu and T. Tamura and Shoji Torii and A. Tricomi and Turner, {W. C.} and A. Viciani and K. Yoshida",
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    TY - GEN

    T1 - Trigger and background study for the LHCf experiment

    AU - Taki, K.

    AU - Adriani, O.

    AU - Bonechi, L.

    AU - Bongi, M.

    AU - Castellini, G.

    AU - D'Alessandro, R.

    AU - Fukui, K.

    AU - Haguenauer, M.

    AU - Itow, Y.

    AU - Kasahara, K.

    AU - Macina, D.

    AU - Mase, T.

    AU - Matsubara, Y.

    AU - Menjo, H.

    AU - Mizuishi, M.

    AU - Muraki, Y.

    AU - Nakai, M.

    AU - Papini, P.

    AU - Masuda, K.

    AU - Perrot, A. L.

    AU - Ricciarini, S.

    AU - Sako, T.

    AU - Shimizu, Y.

    AU - Tamura, T.

    AU - Torii, Shoji

    AU - Tricomi, A.

    AU - Turner, W. C.

    AU - Viciani, A.

    AU - Yoshida, K.

    PY - 2009

    Y1 - 2009

    N2 - We studied the effects of background in the LHCf experiment by MC simulation. An important source of background is given by particles colliding with the inner wall of the beam pipe after they are generated in a proton-proton collision. Because the energies of these particles are less than 100 GeV, they can be reduced at the trigger level. The MC simulations have shown that a signal-tonoise ratio of 1.2% can be achieved. These number can be reduced further in the analysis. Another source of the background is the particles generated in collisions between the beam and the residual gas in the beam pipe. Because the particles are emitted only in the direction of the beam, these backgrounds could be reduced with the coincidence of detectors at both sides of the interaction point. As the detection efficiency of a single calorimeter is only ∼ 15%, the coincidence condition reduces the efficiency down to ∼ 3%. It is the 20% of events by single Arm calorimeter. To solve this problem, we developed additional detectors that have wide aperture and high detection efficiency, called Front Counter. By using the Front Counter signal in the coincidence condition, we can keep ∼ 60% of the single side events but reduce the beam-gas background at the negligible level.

    AB - We studied the effects of background in the LHCf experiment by MC simulation. An important source of background is given by particles colliding with the inner wall of the beam pipe after they are generated in a proton-proton collision. Because the energies of these particles are less than 100 GeV, they can be reduced at the trigger level. The MC simulations have shown that a signal-tonoise ratio of 1.2% can be achieved. These number can be reduced further in the analysis. Another source of the background is the particles generated in collisions between the beam and the residual gas in the beam pipe. Because the particles are emitted only in the direction of the beam, these backgrounds could be reduced with the coincidence of detectors at both sides of the interaction point. As the detection efficiency of a single calorimeter is only ∼ 15%, the coincidence condition reduces the efficiency down to ∼ 3%. It is the 20% of events by single Arm calorimeter. To solve this problem, we developed additional detectors that have wide aperture and high detection efficiency, called Front Counter. By using the Front Counter signal in the coincidence condition, we can keep ∼ 60% of the single side events but reduce the beam-gas background at the negligible level.

    KW - Background

    KW - LHC

    KW - Trigger

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    BT - 31st International Cosmic Ray Conference, ICRC 2009

    PB - University of Lodz

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