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  • 1
    Electronic Resource
    Electronic Resource
    Erratum: "Breakdown delay time in phototriggered discharges'' [J. Appl. Phys. 72, 879 (1992)] (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 4768-4768 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357043
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  • 2
    Electronic Resource
    Electronic Resource
    Triggered breakdown in low-pressure hollow cathode (pseudospark) discharges (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 77-89 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Triggered breakdown in hollow cathode discharges in geometries similar to those used for pseudospark switches and pseudospark pulsed electron beams has been investigated experimentally and with a two-dimensional model previously developed. A systematic study of the influence of the discharge conditions (applied voltage and pressure), geometry, and trigger conditions (trigger intensity and position) on the time to breakdown in helium is presented, and some data are also shown for argon. Excellent qualitative agreement is found between the model predictions and the experimental results. The relation between the time to breakdown and the geometrical distribution of injected charge is discussed, and the understanding gained from these model results is used to suggest guidelines for trigger optimization. Conditions wherein significant oscillations in the current—a "current quenching'' effect—are observed in the prebreakdown current wave form are discussed. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360584
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  • 3
    Electronic Resource
    Electronic Resource
    Breakdown delay time in phototriggered discharges (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 879-887 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The breakdown delay times of phototriggered discharges have been measured and calculated for binary neon/xenon and neon/HCl mixtures as well as for the ternary neon/xenon/HCl mixtures used in XeCl lasers. The study has been performed for minor gas concentrations in the range 10 ppm–10% at total pressures up to 6 bars and for reduced electric fields between 4 and 40 Td. The agreement between the predicted values and the experimental results is quite good. The analysis of the results points out that the breakdown delay times are mainly determined by the direct ionization from the ground-state atoms and molecules, except when the reduced electric field and the concentration in minor gases have simultaneously low values. In such cases, the breakdown delay times are determined by the Penning effects. A transition between a resistive phase, dominated by the microscopic processes, and an inductive regime, which is circuit limited, is also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351762
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  • 4
    Electronic Resource
    Electronic Resource
    Efficient pulsed microwave excitation of a high-pressure excimer discharge (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 5712-5714 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on a microstrip line structure able to sustain plasmas up to five bars of a He/Xe/HCl mixture, with good stability and reproducibility and without preionization of the mixture. The microwave power coupling has been characterized and the incoherent ultraviolet-308 nm emission has been studied by means of time-resolved spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350507
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  • 5
    Electronic Resource
    Electronic Resource
    Theoretical and experimental studies of phototriggered discharges in argon and neon (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 4474-4480 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Characteristics of phototriggered discharges in pure argon and neon have been experimentally and theoretically investigated at pressures between 0.5 and 5 bars and reduced electric fields E/N in the range 5 to 50 Td. Emphasis is laid on the breakdown delay time, defined as the time lag between the application of a very short preionization pulse and the occurrence of the discharge. The model, developed in the frame of the local field approximation, gives breakdown delay time values in excellent agreement with the experimental results. However, in pure neon, the experiments have revealed a large influence of very small amounts of easily ionizable impurities. The calculations point out that the discharge behavior is mainly determined by the electron multiplication rate due to direct ionization of ground state atoms. Other ionizing processes, such as two-step ionization or Penning effects, or the electrical parameters of the circuit (inductance, capacitance, and intensity of the preionization) have only a secondary effect on the breakdown delay time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346197
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  • 6
    Electronic Resource
    Electronic Resource
    Kinetic of the NO removal by nonthermal plasma in N2/NO/C2H4 mixtures (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 4118-4120 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: NO removal is studied in N2/NO and in N2/NO/C2H4 mixtures through time-resolved laser-induced fluorescence in the afterglow of a pulsed homogeneous discharge. NO density measurements are compared with predictions of a 0D model on a large range of parameter values, such as the specific deposited energy and the ethene initial concentration. It is shown that dissociation of NO through collision with the N2(a′1Σu−) state play the main part in the NO removal kinetic. Moreover, quenching of N2(a′1 Σu−) by C2H4 leads to a drastic decrease of the NO removal efficiency when ethene is added to N2/NO. The determined rate coefficient value for the quenching mechanism is (4±2)×10−10 cm3 s−1. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1332413
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  • 7
    Electronic Resource
    Electronic Resource
    Kinetic studies of the H"2(a^3Σ^+"g-〉 b^2Σ^+"u) continuum emission of an ArH"2 mixture pumped by e-beam
    Amsterdam : Elsevier
    Chemical Physics 46 (1980), S. 23-29 
    Details
    ISSN: 0301-0104
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0301-0104(80)85081-6
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamics and correlated performance of a photo-triggered discharge-pumped HF laser using SF6 with hydrogen or ethane (1999)
    Springer
    Applied physics 68 (1999), S. 45-53 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 42.55.Ks; 52.80.-s
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 3 , has been performed in Ne/SF6/H2 and Ne/SF6/C2H6 mixtures. Parameters involved have been the storage line capacitance and the circuit inductance, the capacitors charging voltage, the RH-molecule type and partial pressure, and the X-ray dose for the preionization. High laser performance has been achieved with C2H6: an output energy up to 3 J corresponding to a specific energy of 9.6 J/l at an efficiency of 4.7%, which strengthens the advantage of the photo-triggering technique to energize high-power HF lasers. However the optimum performance achieved with H2, 5.75 J/l and 3.5%, are lower. It is shown, through a time-resolved study of the electrical discharge and spatial dynamics correlated to laser power and energy measurements, that discharge instabilities are responsible for the poor laser performance of the mixture with H2. These instabilities, which lead to arc development, are characteristics of the discharge in Ne/SF6. It is demonstrated for the first time that addition of a heavy hydrocarbon, such as C2H6, to that mixture induces the discharge stabilization so that the laser emission arises in a homogeneous active medium. This effect allows us to achieve better laser performance than with H2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050584
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  • 9
    Electronic Resource
    Electronic Resource
    High-efficiency, high-energy performance of a pulsed HF laser pumped by phototriggered discharge (1992)
    Springer
    Applied physics 55 (1992), S. 183-185 
    Details
    ISSN: 1432-0649
    Keywords: 42.55E ; 42.60B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A comparison of the performance of pulsed infrared HF lasers pumped by phototriggered discharges using either Ne/SF6/H2 or Ne/SF6/C2H6 mixtures are presented. For an active volume of 50 cm3, a specific output energy as high as 11 J/ℓ has been achieved with an efficiency higher than 3% when C2H6 is used as H atom fuel. The replacement of ethane by molecular hydrogen reduces the laser performance by 40%. The investigation of the temporal evolution of the laser intensity shows that this dramatic decrease results from a shortening of the laser pulse duration rather than from a decrease of the peak power. Indications are given that this behavior is correlated to a very different temporal evolution of the discharge parameters, especially at low reduced electric field E/N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324073
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  • 10
    Electronic Resource
    Electronic Resource
    Spectroscopic diagnostics of the onset of discharge instabilities in a XeCl phototriggered laser (1994)
    Springer
    Applied physics 58 (1994), S. 515-517 
    Details
    ISSN: 1432-0649
    Keywords: 42.55.Gp ; 52.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Study of the output power of a XeCl phototriggered laser at high energy loading has shown a multipulse operating mode. Above a critical value giving the maximum output energy, an increase of the applied electric field induces a dramatic decrease of the power emitted in the later peaks as well as the onset of a strong increase of the densities of various excited states, while such an increase is not observed for ionic states. Continuous-Wave (cw) laser-absorption spectroscopy is proved a very sensitive diagnostic tool to study the dynamics of these processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081083
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