Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Modeling of reduced secondary electron emission yield from a foam or fuzz surface

Abstract

Complex structures on a material surface can significantly reduce the total secondary electron emission yield from that surface. A foam or fuzz is a solid surface above which is placed a layer of isotropically aligned whiskers. Primary electrons that penetrate into this layer produce secondary electrons that become trapped and do not escape into the bulk plasma. In this manner the secondary electron yield (SEY) may be reduced. We developed an analytic model and conducted numerical simulations of secondary electron emission from a foam to determine the extent of SEY reduction. We find that the relevant condition for SEY minimization is $$\bar{u}$$≡AD/2>>1 while D <<1, where D is the volume fill fraction and A is the aspect ratio of the whisker layer, the ratio of the thickness of the layer to the radius of the fibers. As a result, we find that foam cannot reduce the SEY from a surface to less than 0.3 of its flat value.

Authors:
ORCiD logo [1]; ORCiD logo [1]
+ Show Author Affiliations
  1. Princeton Univ., Princeton, NJ (United States). Princeton Plasma Physics Lab.
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1419780
Alternate Identifier(s):
OSTI ID: 1416456
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 123; Journal Issue: 2; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Swanson, Charles, and Kaganovich, Igor D. Modeling of reduced secondary electron emission yield from a foam or fuzz surface. United States: N. p., 2018. Web. doi:10.1063/1.5008261.
Copy to clipboard
Swanson, Charles, & Kaganovich, Igor D. Modeling of reduced secondary electron emission yield from a foam or fuzz surface. United States. https://doi.org/10.1063/1.5008261
Copy to clipboard
Swanson, Charles, and Kaganovich, Igor D. Wed . "Modeling of reduced secondary electron emission yield from a foam or fuzz surface". United States. https://doi.org/10.1063/1.5008261. https://www.osti.gov/servlets/purl/1419780.
Copy to clipboard
@article{osti_1419780,
title = {Modeling of reduced secondary electron emission yield from a foam or fuzz surface},
author = {Swanson, Charles and Kaganovich, Igor D.},
abstractNote = {Complex structures on a material surface can significantly reduce the total secondary electron emission yield from that surface. A foam or fuzz is a solid surface above which is placed a layer of isotropically aligned whiskers. Primary electrons that penetrate into this layer produce secondary electrons that become trapped and do not escape into the bulk plasma. In this manner the secondary electron yield (SEY) may be reduced. We developed an analytic model and conducted numerical simulations of secondary electron emission from a foam to determine the extent of SEY reduction. We find that the relevant condition for SEY minimization is $\bar{u}$≡AD/2>>1 while D <<1, where D is the volume fill fraction and A is the aspect ratio of the whisker layer, the ratio of the thickness of the layer to the radius of the fibers. As a result, we find that foam cannot reduce the SEY from a surface to less than 0.3 of its flat value.},
doi = {10.1063/1.5008261},
journal = {Journal of Applied Physics},
number = 2,
volume = 123,
place = {United States},
year = {2018},
month = {1}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.5008261
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Rendering of an example of the foam surface used in this paper. This foam had 80 bers of radius 0.01 in a height of 1, giving it A = 10; D = 4.3%; $\bar{u}$ = 2.2 This is a dense foam.
All figures and tables (5 total)
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

Multipactor
journal, July 1988

  • Vaughan, J. R. M.
  • IEEE Transactions on Electron Devices, Vol. 35, Issue 7
  • DOI: 10.1109/16.3387

Sharp reduction of the secondary electron emission yield from grooved surfaces
journal, November 2008

  • Pivi, M.; King, F. K.; Kirby, R. E.
  • Journal of Applied Physics, Vol. 104, Issue 10
  • DOI: 10.1063/1.3021149

CuO nanowires for inhibiting secondary electron emission
journal, March 2013

Effect of asymmetric secondary emission in bounded low-collisional E × B plasma on sheath and plasma properties
journal, September 2014

  • Wang, Hongyue; Campanell, Michael D.; Kaganovich, Igor D.
  • Journal of Physics D: Applied Physics, Vol. 47, Issue 40
  • DOI: 10.1088/0022-3727/47/40/405204

Secondary electron yields of carbon‐coated and polished stainless steel
journal, April 1982

  • Ruzic, D.; Moore, R.; Manos, D.
  • Journal of Vacuum Science and Technology, Vol. 20, Issue 4
  • DOI: 10.1116/1.571569

Effect of Secondary Electron Emission on Electron Cross-Field Current in $E \times B$ Discharges
journal, April 2011

  • Raitses, Y.; Kaganovich, I. D.; Khrabrov, A.
  • IEEE Transactions on Plasma Science, Vol. 39, Issue 4
  • DOI: 10.1109/TPS.2011.2109403

Secondary electron emission properties
journal, January 1996

Secondary electron emission from plasma-generated nanostructured tungsten fuzz
journal, November 2016

  • Patino, M.; Raitses, Y.; Wirz, R.
  • Applied Physics Letters, Vol. 109, Issue 20
  • DOI: 10.1063/1.4967830

A new formula for secondary emission yield
journal, January 1989

  • Vaughan, J. R. M.
  • IEEE Transactions on Electron Devices, Vol. 36, Issue 9
  • DOI: 10.1109/16.34278

Modeling of reduced effective secondary electron emission yield from a velvet surface
journal, December 2016

  • Swanson, Charles; Kaganovich, Igor D.
  • Journal of Applied Physics, Vol. 120, Issue 21
  • DOI: 10.1063/1.4971337

“Feathered” fractal surfaces to minimize secondary electron emission for a wide range of incident angles
journal, July 2017

  • Swanson, Charles; Kaganovich, Igor D.
  • Journal of Applied Physics, Vol. 122, Issue 4
  • DOI: 10.1063/1.4995535
    Sort by:
    [ × clear filter / sort ]

    Works referencing / citing this record:

    Dynamic secondary electron emission in rough composite materials
    journal, September 2019

    Angular, temperature, and impurity effects on secondary electron emission from Ni(110)
    journal, September 2018

    • Patino, M. I.; Wirz, R. E.; Raitses, Y.
    • Journal of Applied Physics, Vol. 124, Issue 9
    • DOI: 10.1063/1.5025344

    Electron emission from carbon velvet due to incident xenon ions
    journal, July 2018

    • Patino, M. I.; Wirz, R. E.
    • Applied Physics Letters, Vol. 113, Issue 4
    • DOI: 10.1063/1.5037200

    Flashover strength improvement and multipactor suppression in vacuum using surface charge pre-conditioning on insulator
    journal, October 2018

    • Sun, Guang-Yu; Guo, Bao-Hong; Mu, Hai-Bao
    • Journal of Applied Physics, Vol. 124, Issue 13
    • DOI: 10.1063/1.5048063

    Mechanism of vacuum flashover on surface roughness
    journal, March 2019

    • Guo, Bao-Hong; Sun, Guang-Yu; Zhang, Shu
    • Journal of Physics D: Applied Physics, Vol. 52, Issue 21
    • DOI: 10.1088/1361-6463/ab05a0

    Estimation of surface flashover threshold in a vacuum II: flashover phase transition
    journal, December 2019

    • Sun, Guang-Yu; Guo, Bao-Hong; Li, Wen-Dong
    • Journal of Physics D: Applied Physics, Vol. 53, Issue 7
    • DOI: 10.1088/1361-6463/ab5078
      Sort by:
      [ × clear filter / sort ]

      Figures / Tables found in this record:

      FIG. 1 (p. 2)figure
      FIG. 2 (p. 4)figure
      FIG. 3 (p. 4)figure
      FIG. 4 (p. 4)figure
      FIG. 5 (p. 5)figure
        [ × clear filter / sort ]
        Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

        Similar Records in DOE PAGES and OSTI.GOV collections: