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Showing 1 to 20 of 28 for “"Hollow Cathode"”.

  1. Hollow cathode life time modelling

    Coletti, MicheleUniversity of Southampton2008

    Hollow Cathodes (HCs) are of primary importance in the field of electric space propulsion, being used as electron sources in ion and Hall-effect thrusters. Hence, their lifetime is a key factor in all these applications.<br/><br/>HCs have demonstrated the capability of providing up to 30,000 hours …

    soton Repository record

  2. A hollow cathode source for spectroscopic investigations.

    Johnson, Albert DavidBoston University1951

    … the most promising types of light source is the hollow cathode glow discharge tube. In view of this, the present research was undertaken to develop, build, and study a hollow cathode glow discharge tube and the necessary vacuum, circulating, purifying system, for use with the high resolution …

    bu Repository record

  3. Operation Mode Transitions in a Heaterless Hollow Cathode

    Brewer, Trenton R.Virginia Tech2025

    Hollow cathodes are used to neutralize ions in electric propulsion systems, and are a lifetime-limiting component due to the presence of high-energy ions generated in the plasma plume. These ions impact the cathode's keeper electrode destroying it over a period of tens of thousands of hours. The …

    vt Repository record

  4. Hollow cathode sputtering system - installation, operation and theoretical background

    Falk, Sebastian

    … this work was to assemble, install and operate a hollow cathode sputtering system (HCSS). Therefore a complex vacuum system was built to create the right sputtering environment. The purpose of the HCSS is to develop advanced thin conducting oxides (TCOs) as well as high resistivity transparent …

    njit Repository record

  5. Development and Modelling of a Low Current LaB₆ Heaterless Hollow Cathode

    Nikrant, Alex WarnerVirginia Tech2019

    … and testing of a low current, LaB6 heaterless hollow cathode for space propulsion applications. A heaterless design using LaB6 is chosen to reduce complexity and increase electrical power efficiency and robustness. Argon propellant is used due to its more favorable breakdown voltage …

    vt Repository record

  6. Characterization of a Low Current LaB6 Heaterless Hollow Cathode with Krypton Propellant

    Jain, Prachi LalitVirginia Tech2020

    A first-generation LaB6 heaterless hollow cathode with a flat-plate anode is experimentally investigated. The cathode is characterized using krypton as propellant at varying flow rates, discharge currents and cathode-anode distances. Voltage probes, used to make direct voltage measurements in the …

    vt Repository record

  7. An Investigation of the Atomic Fluorine Laser Excited in a Hollow Cathode Discharge

    Crane, John Kenton, IIIUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-12T20:54:52Z (GMT). No. of bitstreams: 1 7913416.pdf: 3615003 bytes, checksum: fee260921b7daa12863360652be71900 (MD5) Previous issue date: 1978

    uiuc Repository record

  8. A Study of Direct Solution Analysis With A New Hollow-Cathode Discharge System

    Zanzucchi, Peter JohnUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-09T17:35:59Z (GMT). No. of bitstreams: 1 6808278.pdf: 5223757 bytes, checksum: 713fa4bef6c574a4ffdbf0c170c5605d (MD5) Previous issue date: 1967

    uiuc Repository record

  9. The Self-Sustaining Processes in a Hollow Cathode to Produce a Steady Electron Emission

    Boehm, Kirk JoachimUniversity of Alabama Libraries2023

    Hollow cathodes are used in just about every plasma process, endemic throughout our lives (i.e., manufacturing, communications, health care, energy). Performance improvements of the hollow cathode seem to have plateaued, though. The two major characteristics are that the electron emission of the …

    alabama Repository record

  10. A study of special line intensities and excited atom populations in a hollow cathode discharge

    Light, C. E.Polytechnic of North London1988

    Discharge processes within hollow cathode lamps with cylindrical mild steel cathodes and neon carrier gas were investigated for a range of discharge currents and different neon pressures.

    london-metro Repository record

  11. Development and characterization of a diverging cusped field thruster and a lanthanum hexaboride hollow cathode

    Courtney, Daniel GeorgeMassachusetts Institute of Technology2008

    … was observed to be conical in shape, with a hollow interior and concentrated ion flux diverging at roughly 32°. In addition to the DCF thruster, a small lanthanum hexaboride (LaB6) hollow cathode has been developed for use with plasma thrusters within the MIT Space Propulsion Laboratory.

    mit Repository record

  12. Application of Hollow Cathode Lamps in a Programmed High-Current Mode for Fluorescence and Absorption Molecular Spectrometry

    Kuo, Pong-Kuen PowellUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-13T20:09:31Z (GMT). No. of bitstreams: 1 7524346.pdf: 5063102 bytes, checksum: f3a18739de2d46a5d1177fa94fc85dce (MD5) Previous issue date: 1975

    uiuc Repository record

  13. Microthrusters based on the T5 and T6 hollow cathodes

    Grubisic, AngeloUniversity of Southampton2011

    … recent years experiments on a T6 hollow cathode have demonstrated the possibility of such a device however the performance, in particular thrust efficiency, falls far short of what would be termed a viable thruster. Nevertheless the means by which hollow cathode discharges are able …

    soton Repository record

  14. Transport in Low Pressure Plasma Reactors for Materials Processing

    Vyas, VivekUniversity of Illinois at Urbana-Champaign2015

    … to the 45-nm node. In this work, IMPVD using a hollow cathode magnetron source has been modeled at the reactor and feature scale. The consequences of varying process parameters such as power, pressure and magnetic fields have been investigated for a hollow cathode magnetron source and comparison …

    uiuc Repository record

  15. Development of a model for the near-exit plume of a Hall thruster

    Parra Díaz, Félix IgnacioMassachusetts Institute of Technology2007

    … to study the azimuthal asymmetry induced by the hollow cathode. The model is composed by the charge and energy conservation equations and is intended to solve for the electrostatic potential and the electron temperature. It relies on the results of an external model for the ion behavior. The …

    mit Repository record

  16. Ion Bunching at High Energies

    Johnson, Gary BurtonUniversity of Illinois at Urbana-Champaign2014

    … experiment was a preformed plasma produced by a hollow cathode discharge.

    uiuc Repository record

  17. Development of a duoplasmatron ion source at the Ithemba laboratory for accelerator based science (ithemba labs)

    Mokoduwe, Peter SetsipaneNorth-West University (South Africa)2002

    A cold hollow cathode duoplasmatron ion source has been designed, built, optimized and evaluated for use as an external stand-by ion source for the second injector cyclotron (SPC2) during those times that the light-ion injector cyclotron (SPCl) is out of operation and not available for …

    nwu-za Repository record

  18. Measurement of the Electron Density and the Attachment Rate Coefficient in Silane/helium Discharges

    Fleddermann, Charles ByrnsUniversity of Illinois at Urbana-Champaign2014

    … glow discharge plasmas was measured in a hollow cathode discharge using microwave diagnostic techniques. When silane is added to the discharge gas, the electron density is drastically reduced, which is attributed to dissociative attachment to a product of the dissociation of the parent …

    uiuc Repository record

  19. Radar observations of field-aligned plasma propagations associated with NASA's PMG experiment

    Olson, Darren MontgomeryMonterey, California. Naval Postgraduate School1994

    … launched in June 1993 to verify the ability of hollow cathode plasma sources to couple electric currents from an electrodynamic tether into the ambient ionospheric plasma. This large-scale coupling process resulted in turbulent plasma signatures associated with the orbiting plasma generator, …

    nps Repository record

  20. Ion plated carbon films and their tribological properties

    Salama, MS1979

    … ionization several times.Ion plating with a hollow cathode discharge is studied. The characteristicsof the deposited film under these conditions are presentedincluding thickness, adhesion and structure, and a comparison is madewith ion plating in abnormal glow discharge.Carbon films have been …

    salford

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