Fully discrete model of kinetic ion-induced electron emission from metal surfaces

被引:1
|
作者
Fernandez-Coppel, Jorge [1 ]
Wirz, Richard [2 ]
Marian, Jaime [1 ,3 ]
机构
[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90024 USA
[2] Oregon State Univ, Sch Mech Ind & Mfg Engn, Corvallis, OR 97003 USA
[3] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA
基金
美国国家航空航天局;
关键词
LOW-ENERGY; SECONDARY ELECTRONS; STAINLESS-STEEL; DEPENDENCE; IMPACT; SLOW; IMPLANTATION; SIMULATIONS; BOMBARDMENT; DEPOSITION;
D O I
10.1063/5.0188000
中图分类号
O59 [应用物理学];
学科分类号
摘要
Ion-induced electron emission (IIEE) is an important process whereby ions impinging on a material surface lead to net emission of electrons into the vacuum. While relevant for multiple applications, IIEE is a critical process of electric thruster (ET) operation and testing for space propulsion, and, as such, it must be carefully quantified for safe and reliable ET performance. IIEE is a complex physical phenomenon, which involves a number of ion-material and ion-electron processes, and is a complex function of ion mass, energy, and angle, as well as host material properties, such as mass and electronic structure. In this paper, we develop a discrete model of kinetic IIEE to gain a more accurate picture of the electric thruster chamber and facility material degradation processes. The model is based on three main developments: (i) the use of modern electronic and nuclear stopping databases, (ii) the use of the stopping and range of ions in matter to track all ion and recoil trajectories inside the target material, and (iii) the use of a scattering Monte Carlo approach to track the trajectories of all mobilized electrons from the point of first energy transfer until full thermalization or escape. This represents a substantial advantage in terms of physical accuracy over existing semi-analytical models commonly used to calculate kinetic IIEE. We apply the model to Ar, Kr, and Xe irradiation of W and Fe surfaces and calculate excitation spectra as a function of ion depth, energy, and angle of incidence. We also obtain minimum threshold ion energies for net nonzero yield for each ion species in both Fe and W and calculate full IIEE yields as a function of ion energy and incidence angle. Our results can be used to assess the effect of kinetic electron emission in models of full ET facility testing and operation.
引用
收藏
页数:19
相关论文
共 50 条
  • [1] Ion-induced secondary electron emission from metal surfaces
    Pamperin, M.
    Bronold, F. X.
    Fehske, H.
    PLASMA SOURCES SCIENCE & TECHNOLOGY, 2018, 27 (08):
  • [2] A hybrid model describing ion induced kinetic electron emission
    Hanke, S.
    Duvenbeck, A.
    Heuser, C.
    Weidtmann, B.
    Wucher, A.
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2015, 352 : 18 - 21
  • [3] Low-energy ion-induced electron emission in metal-insulator-metal sandwich structures
    Kovacs, Domocos
    Golczewski, Artur
    Kowarik, Gregor
    Aumayr, Friedrich
    Diesing, Detlef
    PHYSICAL REVIEW B, 2010, 81 (07):
  • [4] Polyatomic Ion-Induced Electron Emission (IIEE) in Electrospray Thrusters
    Magnusson, Jared M.
    Collins, Adam L.
    Wirz, Richard E.
    AEROSPACE, 2020, 7 (11) : 1 - 21
  • [5] Monte Carlo study of ion-induced secondary electron emission from SiO2
    Uah, Shakir
    Dogar, A. H.
    Qayyum, A.
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2009, 267 (18): : 3059 - 3062
  • [6] Ion-induced nanopattern propagation on metallic surfaces
    Skeren, Tomas
    Vesely, Martin
    Capek, Pavel
    Kral, Jaroslav
    PHYSICAL REVIEW B, 2015, 92 (23)
  • [7] Ion-induced charge emission from unpolished surfaces bombarded by an [Emim][BF4] electrospray plume
    Klosterman, Matthew R.
    Rovey, Joshua L.
    Levin, Deborah A.
    JOURNAL OF APPLIED PHYSICS, 2022, 131 (24)
  • [8] Ion-induced secondary electron emission from MgO and Y2O3 thin films
    Ullah, Shakir
    Dogar, A. H.
    Mehmood, Nasir
    Hussain, Safeer
    Qayyum, A.
    VACUUM, 2009, 84 (05) : 509 - 513
  • [9] Ion-induced electron emission from boron-doped diamond: effect of surface hydrogenation and sample temperature
    Cheifetz, E
    Richter, V
    Zalman, A
    Kalish, R
    DIAMOND AND RELATED MATERIALS, 2001, 10 (3-7) : 824 - 828
  • [10] Kinetic electron emission for grazing scattering of atoms and ions from surfaces
    Winter, Helmut
    SLOW HEAVY-PARTICLE INDUCED ELECTRON EMISSION FROM SOLID SURFACES, 2007, 225 : 113 - 151