Pulsed Microwave Breakdown In Gases With A Low Degree Of Preionization
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Pulsed Microwave Breakdown In Gases With A Low Degree Of Preionization
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Author : E. F. Dawson
language : en
Publisher:
Release Date : 1972
Pulsed Microwave Breakdown In Gases With A Low Degree Of Preionization written by E. F. Dawson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.
The paper presents the results of experimetns on microwave breakdown at an open end waveguide antenna in Air, Argon, Nitrogen, Carbon Dioxide and Methane at pressures of 0.3 and 30 Torr. The antenna was operated at 9.375 GHz under pulsed conditions at varying pulse rates. Very low degrees of preionization were obtained by adjusting to very slow pulse rates. The power needed to maintain the discharge was measured and from that the electric field strength was calculated. This presented as a function of pressure for each gas at pulse rates ranging from 10 to 500 pulses per second. At low pulse rates, significantly higher power levels are needed to maintain the discharge. An interesting feature is the double minima observed at low pulse rates in the data for breakdown field strength as a function of pressure for Carbon Dioxide and Methane. The data was also used to calculate ionization frequency as a function of effective electric field for all give gases. Where possible, this data is compared with data reported by other investigators. (Author).
Physics Of Microwave Discharges
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Author : A Gurevich
language : en
Publisher: Routledge
Release Date : 2018-12-19
Physics Of Microwave Discharges written by A Gurevich and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-12-19 with Science categories.
A comprehensive and unique account of the creation of artificially ionized layers in the middle and upper atmosphere, using powerful radio waves. Major physical mechanisms associated with the formation of the ionized region are studied in detail. The main part of the author's research is devoted to problems associated with the breakdown mechanisms for radio frequency discharges in air. A special chapter deals with breakdown in intersecting pulsed beams and the effects of recombination, diffusion and atmospheric winds on the stability of the structure. The kinetics of the plasma produced are also described. The authors examine possibilities of inducing changes in the chemical composition of the upper atmosphere by means of radio frequence heating, with promising effects on the concentration of constituents such as ozone. The feasibility of using this phenomenon for; ozone healing - in connection with the ozone holes in the polar regions is investigated. The text is a timely treatment of key topics in the field of ionospheric modification.
Documentation Of Plasma Physics Pt 1 Experimental Plasma Physics And Theoretical Plasma Physics
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Author :
language : en
Publisher:
Release Date : 1981
Documentation Of Plasma Physics Pt 1 Experimental Plasma Physics And Theoretical Plasma Physics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Plasma (Ionized gases) categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1984
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Aeronautics categories.
Research In Progress
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Author :
language : en
Publisher:
Release Date : 1971
Research In Progress written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Military research categories.
Microwave Breakdown In Gases
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Author : Alexander D. MacDonald
language : en
Publisher:
Release Date : 1966
Microwave Breakdown In Gases written by Alexander D. MacDonald and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Technology & Engineering categories.
1. Introduction -- Microwave studies -- Dimensional analysis -- 2. Electron collisions -- Elastic collisions -- Inelastic collisions -- Electron loss processes -- 3. Boltzmann equation for an ionized gas -- Distribution functions -- Higher order terms -- Limits of diffusion theory -- 4. Breakdown theory, constant collision frequency -- Breakdown criteria -- Constant collision frequency -- 5. Breakdown theory, variable collision frequency -- Neon -- Neon-argon -- Argon, krypton, and xenon -- 6. Nonuniform and magnetic fields -- Nonuniform electric fields -- Magnetic fields -- 7. Experimental methods -- Microwave systems -- Vacuum systems -- 8. Breakdown in the atmosphere -- Experimental data -- Attachment-controlled breakdown -- Attachment--diffusion theory -- Breakdown near reentry vehicles -- Laser breakdown.
Plasma Physics Index
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Author :
language : en
Publisher:
Release Date : 1982
Plasma Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Plasma (Ionized gases) categories.
Digest Of Literature On Dielectrics
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Author :
language : en
Publisher: National Academies
Release Date : 1975
Digest Of Literature On Dielectrics written by and has been published by National Academies this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Dielectrics categories.
Microwave Breakdown Calculations That Include The Effects Of Preionization In Neon And Neon Argon Mixtures
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Author : Mark R. Foster
language : en
Publisher:
Release Date : 1973
Microwave Breakdown Calculations That Include The Effects Of Preionization In Neon And Neon Argon Mixtures written by Mark R. Foster and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Argon categories.
A computer program has been written to calculate the electric field required to initiate microwave breakdown in a partially ionized gas. The breakdown field is found by calculating ionization rates and diffusion loss rates and then solving for the value of the electric field at which these rates balance. In the preionization case, a modified diffusion coefficient is required to account for charge-separation effects. The program reported here uses the method of MacDonald for calculating ionization and diffusion loss rates and extends that method to the preionization case by using a multiplicative factor to model the transition to ambipolar diffusion. Results are graphed for neon and neon-argon mixtures using various values of the characteristic diffusion length and signal frequency over a range of gas pressures.
Government Reports Announcements
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Author :
language : en
Publisher:
Release Date : 1972-10
Government Reports Announcements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972-10 with Technology categories.