scholarly journals Secondary electron emission characteristics of Al2O3 coatings prepared by atomic layer deposition

AIP Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 095303 ◽  
Author(s):  
Junjiang Guo ◽  
Dan Wang ◽  
Yantao Xu ◽  
Xiangping Zhu ◽  
Kaile Wen ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Atomic Layer ◽  
Emission Characteristics ◽  
Layer Deposition

Theoretical and experimental investigation of secondary electron emission characteristics of MgO coating produced by atomic layer deposition

2020 ◽  
Vol 46 (6) ◽  
pp. 8352-8357 ◽  
Author(s):  
Junjiang Guo ◽  
Dan Wang ◽  
Kaile Wen ◽  
Yantao Xu ◽  
Xiangping Zhu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Atomic Layer Deposition ◽  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Atomic Layer ◽  
Emission Characteristics ◽  
Layer Deposition

scholarly journals Evolvement Investigation of Secondary Electron Emission for Ultrathin MgO Coatings Prepared by Atomic Layer Deposition

2021 ◽  
Vol 11 (11) ◽  
pp. 4801
Author(s):  
Xiangping Zhu ◽  
Junjiang Guo ◽  
Xiangxin Li ◽  
Rundong Zhou ◽  
Dan Wang ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Coating Thickness ◽  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Atomic Layer ◽  
Emission Layer ◽  
Layer Deposition ◽  
20 Nm ◽  
Semi Empirical

MgO is a kind of high secondary electron yield (SEY) material with important applications in electron multipliers. MgO coatings can be used as the electron emission layer for multiplier dynode to improve the electron gain significantly. However, the SEY investigation on ultrathin MgO coatings is not complete and needed to be supplemented urgently. In this work, a series of MgO coatings with increasing thickness were prepared by atomic layer deposition. SEY properties and energy spectra were characterized, and the effect of coating thickness on SEY was systematically analyzed. Experimental results show that SEY of MgO/Si samples rises as the coating thickness increases. Merely, SEY almost does not change with the coating thickness when the thickness exceeds 30 nm. Then, a SEY semi-empirical theory was employed to interpret the SEY regularities of MgO coatings by regarding the coating samples as ideal double-layer structures. Theoretical calculation quantitatively explained the SEY variation observed during the experiments, and further quantified the SEY contribution level of top coating and bottom substrate for the 1 nm and 20 nm MgO coatings. The work is of great significance for comprehending the SEY of ultrathin MgO coatings and expanding the applications of nanoscale coatings with high SEY.

Theoretical study on secondary electron emission characteristics of multilayer films

2015 ◽  
Vol 32 (4) ◽  
pp. 417 ◽  
Author(s):  
Feng Chen ◽  
Jinchuan Guo ◽  
Sifang Chen ◽  
Bin Zhou
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Theoretical Study ◽  
Secondary Electron Emission ◽  
Multilayer Films ◽  
Emission Characteristics

Secondary electron emission characteristics for sol–gel based SiO[sub 2] thin films

2001 ◽  
Vol 19 (3) ◽  
pp. 866 ◽  
Author(s):  
Taewon Jeong ◽  
Jeonghee Lee ◽  
SeGi Yu ◽  
Sunghwan Jin ◽  
Jungna Heo ◽  
...  
Keyword(s):  
Thin Films ◽  
Electron Emission ◽  
Secondary Electron ◽  
Sol Gel ◽  
Secondary Electron Emission ◽  
Emission Characteristics

Erratum: investigation of the secondary electron emission characteristics of alternative dynode materials for imaging photomultipliers

2012 ◽  
Vol 7 (04) ◽  
pp. E04002-E04002 ◽  
Author(s):  
J S Lapington ◽  
V Taillandier ◽  
B L Cann ◽  
J Howorth ◽  
J Milnes
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
Emission Characteristics

Characterization of Secondary Electron Emission from Materials with Low or Negative Electron Affinity

1998 ◽  
Vol 509 ◽  
Author(s):  
J.E. Yater ◽  
A. Shih
Keyword(s):  
Energy Distribution ◽  
Surface Properties ◽  
Electron Affinity ◽  
Electron Emission ◽  
Secondary Electron ◽  
Surface Composition ◽  
Secondary Electron Emission ◽  
Emission Characteristics ◽  
Negative Electron Affinity ◽  
Diamond Surfaces

AbstractSecondary electron emission spectroscopy is used to examine the emission characteristics of diamond films as a function of the bulk and surface properties. We find significant variation in the secondary electron yields measured from diamond surfaces even when energy distribution measurements indicate that a low or negative electron affinity is present. In particular, we observe that the material properties, such as bulk and surface uniformity, surface composition, and impurity and defect concentrations, have a strong affect on the secondary electron yield measurements. Furthermore, the energy distribution of the emitted electrons is found to vary with adsorbate species. In certain cases, the energy distribution changes with adsorbate coverage even though the measured electron intensity remains unchanged. From an analysis of the data, we identify bulk and surface properties needed to optimize the emission characteristics.

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