X-ray and kinetic electron emission by keV proton impacting on fusion-relevant tungsten

Xianming Zhou; Lixia Zeng; Rui Cheng; Yu Lei; Yanhong Chen; Zhongfeng Xu; Ximeng Chen; Yuyu Wang; Yongtao Zhao; Guoqing Xiao

doi:10.1016/j.nimb.2017.01.032

X-ray and kinetic electron emission by keV proton impacting on fusion-relevant tungsten

Xianming Zhou
, Lixia Zeng
, Rui Cheng
, Yu Lei
, Yanhong Chen
, Zhongfeng Xu
, Ximeng Chen
, Yuyu Wang
, Yongtao Zhao
, Guoqing Xiao

School of Physics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

We have measured the electron and X-ray emission of tungsten bombarded with proton in the energy range of 50–250 keV. It is found that the total electron yield mainly consists of kinetic electron emission, which results from the excited valence electrons, and presents a similar trend to the curve of stopping power. The ratio between electron yield and electronic energy loss is not constant, but decreases with increasing incident energy. The behavior is interpreted by an expected competitive mechanism of ionization between different shell electrons of target atom. The explanation is verified by the experimental increase of M-shell X-ray emission yield, and the measured and calculated ionization cross section of core and valence electrons.

Original language	English
Pages (from-to)	491-495
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	406
DOIs	https://doi.org/10.1016/j.nimb.2017.01.032
State	Published - 1 Sep 2017

Keywords

Electron emission
Fusion-relevant tungsten
Proton impact
X-ray

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10.1016/j.nimb.2017.01.032

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title = "X-ray and kinetic electron emission by keV proton impacting on fusion-relevant tungsten",

abstract = "We have measured the electron and X-ray emission of tungsten bombarded with proton in the energy range of 50–250 keV. It is found that the total electron yield mainly consists of kinetic electron emission, which results from the excited valence electrons, and presents a similar trend to the curve of stopping power. The ratio between electron yield and electronic energy loss is not constant, but decreases with increasing incident energy. The behavior is interpreted by an expected competitive mechanism of ionization between different shell electrons of target atom. The explanation is verified by the experimental increase of M-shell X-ray emission yield, and the measured and calculated ionization cross section of core and valence electrons.",

keywords = "Electron emission, Fusion-relevant tungsten, Proton impact, X-ray",

author = "Xianming Zhou and Lixia Zeng and Rui Cheng and Yu Lei and Yanhong Chen and Zhongfeng Xu and Ximeng Chen and Yuyu Wang and Yongtao Zhao and Guoqing Xiao",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = sep,

day = "1",

doi = "10.1016/j.nimb.2017.01.032",

language = "英语",

volume = "406",

pages = "491--495",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

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TY - JOUR

T1 - X-ray and kinetic electron emission by keV proton impacting on fusion-relevant tungsten

AU - Zhou, Xianming

AU - Zeng, Lixia

AU - Cheng, Rui

AU - Lei, Yu

AU - Chen, Yanhong

AU - Xu, Zhongfeng

AU - Chen, Ximeng

AU - Wang, Yuyu

AU - Zhao, Yongtao

AU - Xiao, Guoqing

PY - 2017/9/1

Y1 - 2017/9/1

N2 - We have measured the electron and X-ray emission of tungsten bombarded with proton in the energy range of 50–250 keV. It is found that the total electron yield mainly consists of kinetic electron emission, which results from the excited valence electrons, and presents a similar trend to the curve of stopping power. The ratio between electron yield and electronic energy loss is not constant, but decreases with increasing incident energy. The behavior is interpreted by an expected competitive mechanism of ionization between different shell electrons of target atom. The explanation is verified by the experimental increase of M-shell X-ray emission yield, and the measured and calculated ionization cross section of core and valence electrons.

AB - We have measured the electron and X-ray emission of tungsten bombarded with proton in the energy range of 50–250 keV. It is found that the total electron yield mainly consists of kinetic electron emission, which results from the excited valence electrons, and presents a similar trend to the curve of stopping power. The ratio between electron yield and electronic energy loss is not constant, but decreases with increasing incident energy. The behavior is interpreted by an expected competitive mechanism of ionization between different shell electrons of target atom. The explanation is verified by the experimental increase of M-shell X-ray emission yield, and the measured and calculated ionization cross section of core and valence electrons.

KW - Electron emission

KW - Fusion-relevant tungsten

KW - Proton impact

KW - X-ray

UR - https://www.scopus.com/pages/publications/85010931962

U2 - 10.1016/j.nimb.2017.01.032

DO - 10.1016/j.nimb.2017.01.032

M3 - 文章

AN - SCOPUS:85010931962

SN - 0168-583X

VL - 406

SP - 491

EP - 495

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

ER -

X-ray and kinetic electron emission by keV proton impacting on fusion-relevant tungsten

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Keywords

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