In this paper, design aspects of the output system a 170-GHz/1.5-MW continuous wave gyrotron operating in TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">28,12</sub> mode is presented for testing latest version suite (GDS.V3.2014), which has been equipped with new features. The incorporated and showcased here considering specific as case study. A nonlinear up-taper designed using multiobject particle swarm evolutionary algorithm an advanced...

The design methodology of a sheet beam electron gun has been discussed and, subsequently, used for the intended use in 0.3 THz traveling wave tube amplifier. initial parameters have calculated analytically using theoretical approach. Then, starting with these parameters, designed is then simulated commercial 3-D simulation code "CST Particle Studio" and optimized to get target parameters. circular-shaped cathode an elliptically shaped beam-focusing electrode anode produce good laminar...

In this paper, a complete design methodology of triple frequency gyrotron is presented, which can also be further applied to multifrequency operations. Frequencies for operation are selected as 220, 247.5, and 275 GHz the localized intense heating magnetically confined plasmas (i.e., electron cyclotron current drive) future fusion reactors. A cautious selection procedure mode triplet portrayed in accordance with all possible physical technical constraints. Typical cold cavity (beam absent)...

An extended RF-behavior study of a dual regime gyrotron for large helical devices (LHDs) is presented in this paper. The frequencies taken operation are 77 and 154 GHz as used the LHD experimental campaign. mode-pair selected, after careful consideration practical tradeoff parameters, successful realization design TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">15,4</sub> xmlns:xlink="http://www.w3.org/1999/xlink">28,8</sub> modes at GHz,...

In this paper, the RF behavior studies of a 500 kW 42/84 GHz dual frequency gyrotron is presented. The operating modes selected for regime operation are TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6,3</sub> and xmlns:xlink="http://www.w3.org/1999/xlink">15,4</sub> respectively. present study includes mode competition, cold cavity design, single-mode time dependent multi-mode self-consistent computations.

This paper contributes to the design of a common input/output (I/O) system support dual regime gyrotron operation. I/O comprises different subassemblies such as magnetron injection gun (MIG), quasi-optical launcher, and RF window. The operating frequencies selected are 77/154 GHz with desired mode-pair TE15,4/TE28,8, respectively. necessary selection criteria unified for these has been briefly discussed. initial parameters have using our in-house code Gyrotron Design Suite version 3.0 2014...

Abstract The Tunnel Field Effect Transistor (TFET) often suffers from low ON current ( I ), charge traps, and thermal variability, which limits its performance reliability. To address these issues, the source work function engineered Ge Charge Plasma Double Gate (CP-DGTFET) device structure with HfO 2 /Al O 3 bilayer gate dielectric is designed investigated using numerical TCAD simulations. proposed Ti/HfO /Ge CP-DGTFET showed excellent DC characteristics exceptional , / OFF ratio, minimal...

Summary This paper presents the design and performance evaluation of a single‐layer, high‐gain, millimeter‐wave (mm‐wave), corporate–series‐fed, 16‐element circular patch array antenna tailored for 28 GHz frequency band, pertinent to fifth‐generation (5G) wireless communication systems. The proposed configuration employs dual‐port feeding technique, where consecutive junction patches are interconnected with two separate feed networks. By simultaneously exciting ports identical amplitude but...

The proposed work presents the design of RF interaction structure for MW-level, three-cavity, frequency-doubling gyroklystron amplifier W-Band linear accelerator applications. input cavity is driven by a driver signal 47.5 GHz frequency. It operates in fundamental harmonic TE01 mode, while buncher and output cavities operate second TE02 mode at twice circuit has been designed using combination both analytical studies particle-in-cell simulations. optimized delivers peak power ∼6.6MW, with an...

A self-consistent, nonlinear analysis of the three-stage clustered-cavity gyroklystron amplifier has been developed. The investigation applied to previously reported 32.3-GHz, second harmonic, three-cavity conventional operating at TE02 mode for its performance enhancement in terms bandwidth. Using analysis, a peak RF output <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sim $...

The resistive Metal oxide semiconductor (MOS) type gas sensor has limitations like low selectivity, sensitivity, high temperature, and high-power consumption. To resolve these problems, a capacitive is introduced in this paper. designed carefully by taking care of the fringing field effect. mathematical modeling equivalent circuit been shown. sensing setup explained detail. Finally, model simulated MATLAB COMSOL.

In this paper, a first preliminary design study of 220 GHz, 1 MW gyrotron cavity is presented for probable continuous wave applications in space power grids and electron cyclotron heating current drive (ECH&CD) future magnetically confined thermonuclear fusion plasmas. The present work includes careful selection the candidate modes followed by studies on mode competition, cold initial RF-behavior computations.

In this paper, the design studies of an output system [comprising a nonlinear taper, quasi-optical launcher (QOL), and RF window] for 220-/247.5-/275-GHz, triple-frequency gyrotron are presented. The precisely chosen mode-triplet is TE39,14/TE43,16/TE47,18 to support adequate power transfer at their corresponding frequencies operation. uptaper optimized using our in-house code Gyrotron Design Suite version 4.0 (GDSv4.0 2016) [7] in order reduce mode conversion all frequencies. A common...

In this paper, a broadband 2×2 array antenna operating at 28 GHz is designed and simulated for RF energy harvesting applications. This composed of rectangular patches with U-shaped slot embedded in each patch to improve the impedance matching, gain characteristics desired frequency, proposed excited through 50-ohm microstrip line. Rogers RT/ Duroid 5880 used as substrate which has relative permittivity 2.20 dielectric loss tangent 0.0009, having thickness 0.508 mm. The overall size 14.5×18.8...