کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4921163 1362942 2017 5 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله
Optimized design of polarizers with low ohmic loss and any polarization state for the 28 GHz QUEST ECH/ECCD system
ترجمه فارسی عنوان
طراحی بهینه از پلاریزرها با کمبود oomic کم و هر حالت قطبی شدن برای سیستم ECH / ECCD QUEST ECG 28 گیگاهرتزی
کلمات کلیدی
پلاریزه؛ خم میتر؛ انتقال موج میلیمتر؛ گرمایش سیلیکون الکترونی و درایو کنونی؛
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی


- Ohmic loss was calculated on the grooved mirror surface in simulated polarizers.
- Polarizers with a low ohmic loss feature were optimally designed for 28 GHz.
- Smooth rounded-rectangular grooves were made by mechanical machining.
- The designed polarizers can realize all polarization states.

In a high-power long-pulse millimeter-wave transmission line for electron cyclotron heating and current drive (ECH/ECCD), the ohmic loss on the grooved mirror surface of polarizers is one of the important issues for reducing the transmission loss. In this paper, the ohmic loss on the mirror surface is evaluated in simulated real-scale polarizer miter bends for different groove parameters under a linearly-polarized incident wave excitation. The polarizers with low ohmic loss are optimally designed for a new 28 GHz transmission line on the QUEST spherical tokamak. The calculated optimum ohmic loss is restricted to only less than 1.5 times as large as the theoretical loss for a copper flat mirror at room temperature. The copper rounded-rectangular grooves of the polarizers were relatively easy to make smooth in mechanical machining and the resultant surface roughness was not more than 0.15 μm, which is only 0.38 times as large as the skin depth. The combination of the designed elliptical polarizer and the polarization rotator can also realize any polarization state of the reflected wave.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volume 114, January 2017, Pages 97-101
نویسندگان
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