Drift velocity in n-pentane mixtures and its influence on timing properties of thin gap chambers

D. Lazic, N. Lupu, A. Mincer, Y. Rozen, S. Tarem, A. Breskin, R. Chechik, D. Lellouch, G. Malamud, G. Mikenberg, K. Nagai, A. Pansky, M. Shoa

    Research output: Contribution to journalArticle

    Abstract

    We report on the measurements of the electron drift velocity and longitudinal diffusion in n-pentane gas mixtures and on the effect of the drift velocity on the timing properties of Thin Gap Chambers. Gas mixtures of n-pentane-CO2, n-pentane-CO2-CH4, and n-pentane-CO2-CF4 were investigated. An increase of the drift velocity has been observed with mixtures containing CF4, while still maintaining the very high, saturated gain, typical for these chambers. The overall improvement of TGC timing properties is such that 99% detection efficiency can be reached within a 20 ns gate. A simulation of the chamber timing properties using the measured drift velocities, reproduces well the measured data and can be used to predict chamber performance as a function of geometry and gas mixture.

    Original languageEnglish (US)
    Pages (from-to)159-165
    Number of pages7
    JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    Volume410
    Issue number2
    DOIs
    StatePublished - Jun 11 1998

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    pentanes
    chambers
    time measurement
    Gas mixtures
    gas mixtures
    Geometry
    Electrons
    geometry
    electrons
    simulation

    ASJC Scopus subject areas

    • Instrumentation
    • Nuclear and High Energy Physics

    Cite this

    Drift velocity in n-pentane mixtures and its influence on timing properties of thin gap chambers. / Lazic, D.; Lupu, N.; Mincer, A.; Rozen, Y.; Tarem, S.; Breskin, A.; Chechik, R.; Lellouch, D.; Malamud, G.; Mikenberg, G.; Nagai, K.; Pansky, A.; Shoa, M.

    In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 410, No. 2, 11.06.1998, p. 159-165.

    Research output: Contribution to journalArticle

    Lazic, D, Lupu, N, Mincer, A, Rozen, Y, Tarem, S, Breskin, A, Chechik, R, Lellouch, D, Malamud, G, Mikenberg, G, Nagai, K, Pansky, A & Shoa, M 1998, 'Drift velocity in n-pentane mixtures and its influence on timing properties of thin gap chambers', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 410, no. 2, pp. 159-165. https://doi.org/10.1016/S0168-9002(98)00225-3
    Lazic, D. ; Lupu, N. ; Mincer, A. ; Rozen, Y. ; Tarem, S. ; Breskin, A. ; Chechik, R. ; Lellouch, D. ; Malamud, G. ; Mikenberg, G. ; Nagai, K. ; Pansky, A. ; Shoa, M. / Drift velocity in n-pentane mixtures and its influence on timing properties of thin gap chambers. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 1998 ; Vol. 410, No. 2. pp. 159-165.
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    AU - Lazic, D.

    AU - Lupu, N.

    AU - Mincer, A.

    AU - Rozen, Y.

    AU - Tarem, S.

    AU - Breskin, A.

    AU - Chechik, R.

    AU - Lellouch, D.

    AU - Malamud, G.

    AU - Mikenberg, G.

    AU - Nagai, K.

    AU - Pansky, A.

    AU - Shoa, M.

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    AB - We report on the measurements of the electron drift velocity and longitudinal diffusion in n-pentane gas mixtures and on the effect of the drift velocity on the timing properties of Thin Gap Chambers. Gas mixtures of n-pentane-CO2, n-pentane-CO2-CH4, and n-pentane-CO2-CF4 were investigated. An increase of the drift velocity has been observed with mixtures containing CF4, while still maintaining the very high, saturated gain, typical for these chambers. The overall improvement of TGC timing properties is such that 99% detection efficiency can be reached within a 20 ns gate. A simulation of the chamber timing properties using the measured drift velocities, reproduces well the measured data and can be used to predict chamber performance as a function of geometry and gas mixture.

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