Ionization coefficients in selected gas mixtures of interest to particle detectors

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.350730· OSTI ID:5551912

Datskos, P G; Carter, J G; Christophorou, L G ^[1]

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1. Atomic, Molecular, and High Voltage Physics Group, Health and Safety Research Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6122 (United States) Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)

We have measured and report the total gas-number-density normalized effective ionization coefficient, {bar {alpha}}/{ital N}, as a function of the density-reduced electric field, {ital E}/{ital N} for Ar, CO{sub 2}, CF{sub 4}, the binary gas mixtures CF{sub 4}:Ar (20:80), CO{sub 2}:Ar(20:80), CO{sub 2}:CH{sub 4}(20:80) and for the ternary gas mixtures CO{sub 2}:CF{sub 4}:Ar (10:10:80) and H{sub 2}O:CF{sub 4}:Ar(2:18:80). We also report the limiting value, ({ital E}/{ital N}){sub lim} of the above gaseous systems. A comparison of our results on the unitary gases shows good agreement with previous measurements. The results on the ternary mixtures show that the addition of CO{sub 2} or H{sub 2}O to the binary gas mixture CF{sub 4}:Ar lowers the electron energies and increases {bar {alpha}}/{ital N}({ital E}/{ital N}).

• DOE Contract Number: AC05-84OR21400; AS05-76ER03956
• OSTI ID: 5551912
• Journal Information: Journal of Applied Physics; (United States), Vol. 71:1; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
43 PARTICLE ACCELERATORS
ARGON
IONIZATION POTENTIAL
CARBON DIOXIDE
CARBON FLUORIDES
SUPERCONDUCTING SUPER COLLIDER
MUON DETECTION
BINARY MIXTURES
IONIZED GASES
LASER-RADIATION HEATING
LIMITING VALUES
WATER
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLE DETECTION
DETECTION
DISPERSIONS
ELEMENTS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
HEATING
HYDROGEN COMPOUNDS
MIXTURES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLASMA HEATING
RADIATION DETECTION
RARE GASES
STORAGE RINGS
664400* - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)
430300 - Particle Accelerators- Auxiliaries & Components