Backscattered electron emission after proton impact on carbon and gold films: Experiments and simulations

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Résumé

This work aims at measuring the proton induced secondary electron energy spectra from nanometer thin films. Backscattered electron energy spectra were measured within an energy range from 0 to 600 eV using a Retarding Field Analyser (RFA). This paper presents energy spectra obtained for proton (0.5 MeV; 1 MeV; 1.5 MeV; 2 MeV) irradiation of thin carbon films (50 and 100 nm thick) and thin gold film (200 nm). These experimental spectra were compared with Monte Carlo simulations based on TRAX code and Geant4 simulation toolkit. Good agreement between experimental, TRAX and Geant4 results were observed for the carbon target. For the gold target, we report major differences between both Monte Carlo environments. Limitation of Geant4 models for low energy electron emission was highlighted. On the contrary, TRAX simulations present encouraging results for the modeling of low-energy electron emission from gold target.

Empreinte digitale

proton impact
Electron emission
electron emission
Protons
energy spectra
Gold
gold
Carbon
carbon
electron energy
Thin films
protons
Electrons
simulation
Experiments
Carbon films
energy
retarding
Irradiation
irradiation

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    @article{ad8bce5d9c58458987cf4d80ffe7793b,
    title = "Backscattered electron emission after proton impact on carbon and gold films: Experiments and simulations",
    abstract = "This work aims at measuring the proton induced secondary electron energy spectra from nanometer thin films. Backscattered electron energy spectra were measured within an energy range from 0 to 600 eV using a Retarding Field Analyser (RFA). This paper presents energy spectra obtained for proton (0.5 MeV; 1 MeV; 1.5 MeV; 2 MeV) irradiation of thin carbon films (50 and 100 nm thick) and thin gold film (200 nm). These experimental spectra were compared with Monte Carlo simulations based on TRAX code and Geant4 simulation toolkit. Good agreement between experimental, TRAX and Geant4 results were observed for the carbon target. For the gold target, we report major differences between both Monte Carlo environments. Limitation of Geant4 models for low energy electron emission was highlighted. On the contrary, TRAX simulations present encouraging results for the modeling of low-energy electron emission from gold target.",
    keywords = "Proton beam, Gold target, Carbon target, Electron emission, Low-energy electron, Geant4, TRAX, Monte Carlo",
    author = "F{\'e}licien Hespeels and Anne-Catherine Heuskin and E Scifoni and M Kraemer and St{\'e}phane Lucas",
    year = "2017",
    doi = "10.1016/j.nimb.2017.04.032",
    language = "English",
    volume = "401",
    pages = "8--17",
    journal = "Nuclear Instruments and Methods in Physics Research B",
    issn = "0168-583X",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - Backscattered electron emission after proton impact on carbon and gold films

    T2 - Nuclear Instruments and Methods in Physics Research B

    AU - Hespeels,Félicien

    AU - Heuskin,Anne-Catherine

    AU - Scifoni,E

    AU - Kraemer,M

    AU - Lucas,Stéphane

    PY - 2017

    Y1 - 2017

    N2 - This work aims at measuring the proton induced secondary electron energy spectra from nanometer thin films. Backscattered electron energy spectra were measured within an energy range from 0 to 600 eV using a Retarding Field Analyser (RFA). This paper presents energy spectra obtained for proton (0.5 MeV; 1 MeV; 1.5 MeV; 2 MeV) irradiation of thin carbon films (50 and 100 nm thick) and thin gold film (200 nm). These experimental spectra were compared with Monte Carlo simulations based on TRAX code and Geant4 simulation toolkit. Good agreement between experimental, TRAX and Geant4 results were observed for the carbon target. For the gold target, we report major differences between both Monte Carlo environments. Limitation of Geant4 models for low energy electron emission was highlighted. On the contrary, TRAX simulations present encouraging results for the modeling of low-energy electron emission from gold target.

    AB - This work aims at measuring the proton induced secondary electron energy spectra from nanometer thin films. Backscattered electron energy spectra were measured within an energy range from 0 to 600 eV using a Retarding Field Analyser (RFA). This paper presents energy spectra obtained for proton (0.5 MeV; 1 MeV; 1.5 MeV; 2 MeV) irradiation of thin carbon films (50 and 100 nm thick) and thin gold film (200 nm). These experimental spectra were compared with Monte Carlo simulations based on TRAX code and Geant4 simulation toolkit. Good agreement between experimental, TRAX and Geant4 results were observed for the carbon target. For the gold target, we report major differences between both Monte Carlo environments. Limitation of Geant4 models for low energy electron emission was highlighted. On the contrary, TRAX simulations present encouraging results for the modeling of low-energy electron emission from gold target.

    KW - Proton beam

    KW - Gold target

    KW - Carbon target

    KW - Electron emission

    KW - Low-energy electron

    KW - Geant4

    KW - TRAX

    KW - Monte Carlo

    U2 - 10.1016/j.nimb.2017.04.032

    DO - 10.1016/j.nimb.2017.04.032

    M3 - Article

    VL - 401

    SP - 8

    EP - 17

    JO - Nuclear Instruments and Methods in Physics Research B

    JF - Nuclear Instruments and Methods in Physics Research B

    SN - 0168-583X

    ER -