Measurements of the electron drift velocity and positive-ion mobility for gases containing CF4

T. Yamashita; H. Kobayashi; A. Konaka; H. Kurashige; K. Miyake; M. M. Morii; T. T. Nakamura; T. Nomura; N. Sasao; Y. Fukushima; M. Nomachi; O. Sasaki; F. Suekane; T. Taniguchi

doi:10.1016/0168-9002(89)91445-9

Measurements of the electron drift velocity and positive-ion mobility for gases containing CF₄

T. Yamashita, H. Kobayashi, A. Konaka, H. Kurashige, K. Miyake, M. M. Morii, T. T. Nakamura, T. Nomura, N. Sasao, Y. Fukushima, M. Nomachi, O. Sasaki, F. Suekane, T. Taniguchi

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Abstract

Measurements of the electron drift velocity and positive-ion mobility for gases containing CF₄ have been performed. The results are presented for four types of gas mixtures containing CF₄ and hydrocarbons: CF₄+CH₄, CF₄+C₂H₆, CF₄+C₃H₈ and CF₄+iso-C₄H₁₀. To make a comparison, also positive-ion mobilities for Ar+C₂H₆ and Ar+C₃H₈ gas mixtures have been measured. The drift velocities of electrons in a few mixtures are found to exceed 10 cm/μs, twice that in a conventional drift chamber gas such as Ar(50%)+C₂H₆(50%). In particular, the electron drift velocity in CF₄(10%)+CH₄(90%) is larger than 10 cm/μs, even at a reduced electric field E/P of more than 1 V/(cm Torr). Results on the measurements of the positive ion mobility are consistent with the interpretation that the hydrocarbon ions are the positive ions eventually drifting toward the cathode in the studied gas mixtures. Their mobilities in CF₄ are found to be smaller than those in Ar.

Original language	English
Pages (from-to)	709-715
Number of pages	7
Journal	Nuclear Inst. and Methods in Physics Research, A
Volume	283
Issue number	3
DOIs	https://doi.org/10.1016/0168-9002(89)91445-9
Publication status	Published - 1989 Nov 10
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Yamashita, T., Kobayashi, H., Konaka, A., Kurashige, H., Miyake, K., Morii, M. M., Nakamura, T. T., Nomura, T., Sasao, N., Fukushima, Y., Nomachi, M., Sasaki, O., Suekane, F., & Taniguchi, T. (1989). Measurements of the electron drift velocity and positive-ion mobility for gases containing CF₄. Nuclear Inst. and Methods in Physics Research, A, 283(3), 709-715. https://doi.org/10.1016/0168-9002(89)91445-9

Yamashita, T, Kobayashi, H, Konaka, A, Kurashige, H, Miyake, K, Morii, MM, Nakamura, TT, Nomura, T, Sasao, N, Fukushima, Y, Nomachi, M, Sasaki, O, Suekane, F & Taniguchi, T 1989, 'Measurements of the electron drift velocity and positive-ion mobility for gases containing CF₄', Nuclear Inst. and Methods in Physics Research, A, vol. 283, no. 3, pp. 709-715. https://doi.org/10.1016/0168-9002(89)91445-9

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title = "Measurements of the electron drift velocity and positive-ion mobility for gases containing CF4",

abstract = "Measurements of the electron drift velocity and positive-ion mobility for gases containing CF4 have been performed. The results are presented for four types of gas mixtures containing CF4 and hydrocarbons: CF4+CH4, CF4+C2H6, CF4+C3H8 and CF4+iso-C4H10. To make a comparison, also positive-ion mobilities for Ar+C2H6 and Ar+C3H8 gas mixtures have been measured. The drift velocities of electrons in a few mixtures are found to exceed 10 cm/μs, twice that in a conventional drift chamber gas such as Ar(50%)+C2H6(50%). In particular, the electron drift velocity in CF4(10%)+CH4(90%) is larger than 10 cm/μs, even at a reduced electric field E/P of more than 1 V/(cm Torr). Results on the measurements of the positive ion mobility are consistent with the interpretation that the hydrocarbon ions are the positive ions eventually drifting toward the cathode in the studied gas mixtures. Their mobilities in CF4 are found to be smaller than those in Ar.",

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doi = "10.1016/0168-9002(89)91445-9",

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T1 - Measurements of the electron drift velocity and positive-ion mobility for gases containing CF4

AU - Yamashita, T.

AU - Kobayashi, H.

AU - Konaka, A.

AU - Kurashige, H.

AU - Miyake, K.

AU - Morii, M. M.

AU - Nakamura, T. T.

AU - Nomura, T.

AU - Sasao, N.

AU - Fukushima, Y.

AU - Nomachi, M.

AU - Sasaki, O.

AU - Suekane, F.

AU - Taniguchi, T.

PY - 1989/11/10

Y1 - 1989/11/10

N2 - Measurements of the electron drift velocity and positive-ion mobility for gases containing CF4 have been performed. The results are presented for four types of gas mixtures containing CF4 and hydrocarbons: CF4+CH4, CF4+C2H6, CF4+C3H8 and CF4+iso-C4H10. To make a comparison, also positive-ion mobilities for Ar+C2H6 and Ar+C3H8 gas mixtures have been measured. The drift velocities of electrons in a few mixtures are found to exceed 10 cm/μs, twice that in a conventional drift chamber gas such as Ar(50%)+C2H6(50%). In particular, the electron drift velocity in CF4(10%)+CH4(90%) is larger than 10 cm/μs, even at a reduced electric field E/P of more than 1 V/(cm Torr). Results on the measurements of the positive ion mobility are consistent with the interpretation that the hydrocarbon ions are the positive ions eventually drifting toward the cathode in the studied gas mixtures. Their mobilities in CF4 are found to be smaller than those in Ar.

AB - Measurements of the electron drift velocity and positive-ion mobility for gases containing CF4 have been performed. The results are presented for four types of gas mixtures containing CF4 and hydrocarbons: CF4+CH4, CF4+C2H6, CF4+C3H8 and CF4+iso-C4H10. To make a comparison, also positive-ion mobilities for Ar+C2H6 and Ar+C3H8 gas mixtures have been measured. The drift velocities of electrons in a few mixtures are found to exceed 10 cm/μs, twice that in a conventional drift chamber gas such as Ar(50%)+C2H6(50%). In particular, the electron drift velocity in CF4(10%)+CH4(90%) is larger than 10 cm/μs, even at a reduced electric field E/P of more than 1 V/(cm Torr). Results on the measurements of the positive ion mobility are consistent with the interpretation that the hydrocarbon ions are the positive ions eventually drifting toward the cathode in the studied gas mixtures. Their mobilities in CF4 are found to be smaller than those in Ar.

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Measurements of the electron drift velocity and positive-ion mobility for gases containing CF₄

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