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Title: Temporal response of a surface flashover on a velvet cathode in a relativistic diode

Abstract

Surface flashover of a carbon fiber velvet cathode generates a discharge from which electrons are relativistically accelerated to γ ranging from 4.9 to 8.8 through a 17.8 cm diode. This discharge is assumed to be a hydrocarbon mixture. Our objective is to quantify the dynamics over the ~100 ns pulse of the plasma discharge generated on the surface of the velvet cathode and across the anode-cathode (A-K) gap. We present a qualitative comparison of calculated and measured results, which includes time resolved measurements with a photomultiplier tube and charge-coupled device images. Additionally, initial visible spectroscopy measurements will also be presented confirming the ion species are dominated by hydrogen.

Authors:
 [1];  [1];  [1];  [2]; ORCiD logo [2]
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Voss Scientific, Albuquerque, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1291215
Alternate Identifier(s):
OSTI ID: 1228167
Report Number(s):
LA-UR-15-20392
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 3; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Coleman, J. E., Moir, D. C., Crawford, M. T., Welch, D. R., and Offermann, D. T. Temporal response of a surface flashover on a velvet cathode in a relativistic diode. United States: N. p., 2015. Web. doi:10.1063/1.4914851.
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Coleman, J. E., Moir, D. C., Crawford, M. T., Welch, D. R., & Offermann, D. T. Temporal response of a surface flashover on a velvet cathode in a relativistic diode. United States. https://doi.org/10.1063/1.4914851
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Coleman, J. E., Moir, D. C., Crawford, M. T., Welch, D. R., and Offermann, D. T. Wed . "Temporal response of a surface flashover on a velvet cathode in a relativistic diode". United States. https://doi.org/10.1063/1.4914851. https://www.osti.gov/servlets/purl/1291215.
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@article{osti_1291215,
title = {Temporal response of a surface flashover on a velvet cathode in a relativistic diode},
author = {Coleman, J. E. and Moir, D. C. and Crawford, M. T. and Welch, D. R. and Offermann, D. T.},
abstractNote = {Surface flashover of a carbon fiber velvet cathode generates a discharge from which electrons are relativistically accelerated to γ ranging from 4.9 to 8.8 through a 17.8 cm diode. This discharge is assumed to be a hydrocarbon mixture. Our objective is to quantify the dynamics over the ~100 ns pulse of the plasma discharge generated on the surface of the velvet cathode and across the anode-cathode (A-K) gap. We present a qualitative comparison of calculated and measured results, which includes time resolved measurements with a photomultiplier tube and charge-coupled device images. Additionally, initial visible spectroscopy measurements will also be presented confirming the ion species are dominated by hydrogen.},
doi = {10.1063/1.4914851},
journal = {Physics of Plasmas},
number = 3,
volume = 22,
place = {United States},
year = {Wed Mar 11 00:00:00 EDT 2015},
month = {Wed Mar 11 00:00:00 EDT 2015}
}
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https://doi.org/10.1063/1.4914851
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    Works referencing / citing this record:

    Modeling and experimental characterization of the plasma produced by a velvet cathode in a linear induction accelerator
    journal, August 2018

    • Plewa, J. M.; Eichwald, O.; Yousfi, M.
    • Physics of Plasmas, Vol. 25, Issue 8
    • DOI: 10.1063/1.5038012
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