کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1682867 1010484 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of surface mechanical finishes on charging ability of electron irradiated PMMA in a scanning electron microscope
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Effect of surface mechanical finishes on charging ability of electron irradiated PMMA in a scanning electron microscope
چکیده انگلیسی

Charging of Polymethyl Methacrylate insulators (PMMA), in a scanning electron microscope (SEM) is studied owing to a time resolved current method. This method allows the evolution of trapped charge versus time and the charging time constant to be deduced. The effect of surface roughness change on the ability of PMMA to trapped charge is highlighted. The results show that the trapped charge at the steady state decreases when the roughness increases in the micrometer range while the time constant of charging increases with surface roughness. This behaviour is due to the increase of leakage current and/or enhanced secondary electron emission (SEE). On the one hand, surface mechanical finishes allows, the build up charge in insulators submitted to an electron bombardment to be lowered. On the other hand this treatment allows the secondary electron emission to be raised for some specific applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 269, Issue 19, 1 October 2011, Pages 2117–2123
نویسندگان
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