کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10676503 | 1011335 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of a gap between dielectric and waveguide on the dispersion relation of the Äerenkov device
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We present a method for calculating efficiently the dispersion curve of a cylindrical Äerenkov device having a small gap between the dielectric liner and the guide wall. In any practical realisation, such a gap cannot be avoided and the results obtained here indicate that the dispersion curve is very sensitive to its thickness. Using a liner with a higher dielectric constant increases the sensitivity of the dispersion to the size of the gap. If a very high-energy electron beam is employed, having an electron velocity almost equal to c (speed of light in a free space) then synchronism occurs close to the intersection of the dispersion curve and the vacuum light line where the effect of the gap is small; in fact, a large gap could be left between the dielectric liner and the waveguide if this was advantageous for construction purposes. However, at lower electron energies, typical of those used in microwave devices, the effect of even a relatively small gap can be considerable on the synchronism condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 77, Issue 4, 11 March 2005, Pages 533-538
Journal: Vacuum - Volume 77, Issue 4, 11 March 2005, Pages 533-538
نویسندگان
C. Petichakis, Y.S. Tan, R.A. Stuart, A.I. Al-Shamma'a,