Influence of upper hybrid resonance localized oscillation on X-B mode conversion efficiency for high-β National Spherical Torus Experiment in nonlinear regime

2015 ◽  
Vol 22 (6) ◽  
pp. 062505 ◽  
Author(s):  
M. Abbasi ◽  
M. Ali Asgarian ◽  
S. Sobhanian ◽  
Y. Sadeghi
Keyword(s):  
Conversion Efficiency ◽  
Mode Conversion ◽  
Nonlinear Regime ◽  
Spherical Torus ◽  
Hybrid Resonance

Direct X-B mode conversion for high-βnational spherical torus experiment in nonlinear regime

2014 ◽  
Vol 21 (9) ◽  
pp. 092516 ◽  
Author(s):  
M. Ali Asgarian ◽  
A. Parvazian ◽  
M. Abbasi ◽  
J. P. Verboncoeur
Keyword(s):  
Mode Conversion ◽  
Nonlinear Regime ◽  
Spherical Torus

Periodic printed semi-annular substrate loaded TM01–TE11 mode converter

2020 ◽  
pp. 1-7
Author(s):  
Ashish Chittora ◽  
Swati Varun Yadav
Keyword(s):  
Conversion Efficiency ◽  
Mode Conversion ◽  
Circular Waveguide ◽  
Mode Converter ◽  
Space Applications ◽  
High Power Microwave ◽  
Relative Bandwidth ◽  
Measurement Results ◽  
Power Handling Capability ◽  
Lightweight Structure

Abstract A mode converter design using the concept of periodic substrates loading in a circular waveguide, to convert TM01 mode to TE11 mode is presented in this paper. The detailed design principle, simulation, and measurement results are included in this study. Simulation results show that the purity of output fundamental TE11 mode of the converter approaches 99.2% for an operating frequency of 3.2 GHz. The mode conversion efficiency is more than 90% over 3.07–3.25 GHz band and the relative bandwidth is 5.6% (180 MHz). The proposed TM01–TE11 mode converter has advantages, such as the compact, lightweight structure, high conversion efficiency, and proper bandwidth. The fabrication cost is relatively low and the structure is easy to fabricate. The power-handling capability is limited to 10 MW due to dielectric-based design. The compactness and portability of the system (e.g. Space applications, Accelerators, High Power Microwave) can be improved significantly using the proposed mode converter.

Enhancing The Mode Conversion Efficiency In JET Plasmas With Multiple Mode Conversion Layers

2011 ◽  
Author(s):  
D. Van Eester ◽  
E. Lerche ◽  
T. Johnson ◽  
T. Hellsten ◽  
J. Ongena ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Mode Conversion ◽  
Multiple Mode
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