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Cited by 15Low-Pressure Plasma Processing and DiagnosticsElectron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysis

The DOI matches its Crossref record; 58 of the 58 references it cites were found in a registry or an index.

Monte Carlo modeling of low-energy electron-induced secondary electron emission yields in micro-architected boron nitride surfaces

Open access
Chang, Hsing-Yin, Alvarado, Andrew, Weber, Trey, Marian, Jaime·2019·Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
DOI 10.1016/j.nimb.2019.05.079
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Abstract

Abstract Surface erosion and secondary electron emission (SEE) have been identified as the most critical life-limiting factors in channel walls of Hall-effect thrusters for space propulsion. Recent wall concepts based on micro-architected surfaces have been proposed to mitigate surface erosion and SEE. The idea behind these designs is to take advantage of very-high surface-to-volume ratios to reduce SEE and ion erosion by internal trapping and redeposition. This has resulted in renewed interest to study electron–electron processes in relevant thruster wall materials. In this work, we present calculations of SEE yields in micro-porous hexagonal BN surfaces using stochastic simulations of electron-material interactions in discretized surface geometries. Our model consists of two complementary parts. First we study SEE as a function of primary electron energy and incidence angle in flat surfaces using Monte Carlo simulations of electron multi-scattering processes. The results are then used to represent the response function of discrete surface elements to individual electron rays generated using a ray-tracing Monte Carlo model. We find that micro-porous surfaces result in SEE yield reductions of over 50% in the energy range experienced in Hall thrusters. This points to the suitability of these micro-architected surface concepts to mitigate SEE-related issues in compact electric propulsion devices.

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Research works printed but not linked: 2

  1. Goebel, 2008, Vol. 1
  2. Bugeat, 1995, Development of a secondary generation of spt, Electric Rocket Propul. Soc. Paper, 95

Cited by

See all 15

Metadata

Authors
Chang, H.-Y., Alvarado, A., Weber, T., & Marian, J.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Chang, Hsing-Yin
ORCID
Venue
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Publisher
Elsevier BV
Published
2019-09
Volume
454
Pages
14-22
ISSN
0168-583X (ISSN-L)
DOI
10.1016/j.nimb.2019.05.079
OpenAlex
W2945553264
Cited by
15
References
58
Citations by year
2026: 3 · 2025: 2 · 2024: 1 · 2023: 3 · 2021: 4 · 2020: 2
FWCI
0.54
Type
journal article
Language
en
Open access
Licence
Locations
  • Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms (acceptedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • arXiv (Cornell University) (public-domain)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Low-Pressure Plasma Processing and Diagnostics
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Electron and X-Ray Spectroscopy Techniques
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Ion-surface interactions and analysis
Keywords
secondary electron emission, boron nitride, Hall thruster, surface erosion, electric propulsion

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