Secondary electron emission from insulators and negative electron affinity semiconductors
نویسندگان
چکیده
منابع مشابه
Instrumentation for Studies of Electron Emission and Charging from Insulators
Making measurements of electron emission properties of insulators is difficult since insulators can charge either negatively or positively under charge particle bombardment. In addition, high incident energies or high fluences can result in modification of a material’s conductivity, bulk and surface charge profile, structural makeup through bond breaking and defect creation, and emission proper...
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Ž . Ž . The electronic structure of GaN and AlN 0001 surfaces and modification by cesium Cs adsorption are investigated via Ž . Ž . ultra-violet and X-ray photoemission spectroscopy UPS, XPS and total yield spectroscopy. The electron affinity EA of the clean and ordered 1=1 surfaces is found to be equal to 3.3 and 1.9 eV for GaN and AlN, respectively. Cs adsorption Ž . with the help of oxygen p...
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Secondary-electron-emission processes under electron bombardment play an important role in the performance of a variety of electron devices. While in some devices, the anode and the grid require materials that suppress the secondary-electron-generation process, the crossed-field amplifier (CFA) is an example where the cathode requires an efficient secondaryelectron-emission material. Secondary-...
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ژورنال
عنوان ژورنال: Results in Physics
سال: 2021
ISSN: 2211-3797
DOI: 10.1016/j.rinp.2020.103745