کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5466620 1518295 2018 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of trapped charges distribution in terms of mirror plot curve
ترجمه فارسی عنوان
مشخصه توزیع اتهامات به دام افتاده از نظر منحنی طرح آینه
کلمات کلیدی
میکروسکوپ الکترونی اسکن، اثر آینه، پتانسیل نمونه، فرآیند شارژ، نمونه های عایق، منحنی طرح آینه،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
Accumulation of charges (electrons) at the specimen surface in scanning electron microscope (SEM) lead to generate an electrostatic potential. By using the method of image charges, this potential is defined in the chamber's space of such apparatus. The deduced formula is expressed in terms a general volumetric distribution which proposed to be an infinitesimal spherical extension. With aid of a binomial theorem the defined potential is expanded to a multipolar form. Then resultant formula is adopted to modify a novel mirror plot equation so as to detect the real distribution of trapped charges. Simulation results reveal that trapped charges may take a various sort of arrangement such as monopole, quadruple and octuple. But existence of any of these arrangements alone may never be take place, rather are some a formations of a mix of them. Influence of each type of these profiles depends on the distance between the incident electron and surface of a sample. Result also shows that trapped charge's amount of trapped charges can refer to a threshold for failing of point charge approximation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 184, Part A, January 2018, Pages 12-16
نویسندگان
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