Design of 35 GHZ Gyrotron for Material Processing Applications

Abstract

Abstract-The complete design of 35 GHz, 200 kW gyrotron for various material processing and heating applications is presented in this article. The components of the device, such as Magnetron Injection Gun, interaction cavity, collector and RF window, are designed for the TE 03 mode. Various in-house developed codes (GCOMS, MIGSYN and MIGANS) and commercially available codes (MAGIC, EGUN and CST-MS) are used for the design purpose. A thorough sensitivity analysis of the gyrotron components is also carried out. The designed device shows the capability to generate more than 200 kW of output power with more than 40% of efficiency.

Electron beam emission and interaction of double-beam gyrotron

“…The cathode radius can be obtained from r c = (f m ) 1/2 r g [14,15,20,26], where r g = r 2 b − r 2 lo . For r lo r b , approximate values of the cathode radii for two electron beams have been calculated as…”

“…The Particle-in-Cell (PIC) code MAGIC is used for the beamwave interaction computation and the optimization of electron beam parameters [25]. The PIC code is successfully implemented in the beam-wave interaction computation and cavity design for low power, low frequency [26] and high power, high frequency gyrotrons [27,28] for single-beam operation. The rigorous simulations are performed for different values of electron beam currents at first and second radial maxima of the operating mode considering the maximum interaction efficiency and output power.…”

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

“…Although various components have been developed for THz applications [5][6][7][8][9][10][11][12][13][14][15][16][17][18], high power, low cost, and compact THz sources are not readily available [19]. With the rapid advancement of multi-physics based codes, which provide the possibility of simulating the nonlinear beam-wave interaction dynamics [20][21][22][23][24], extending the operating frequency of the existing microwave tube designs [25][26][27][28][29] has become a promising approach for developing compact and powerful THz sources [30][31][32][33][34][35][36]. In accordance with this approach, design and numerical simulations of a 140 GHz spatial-harmonic magnetron (SHM) with a maximum pulse-output power of about 11 kW is presented in this paper.…”

Selective Suppression of Electromagnetic Modes in a Rectangular Waveguide by Using Distributed Wall Losses

“…For example, when a rectangular waveguide is applied as the beam-wave interaction circuit of vacuum electron devices like the gyrotron, unwanted modes can be excited by spurious oscillations resulted from various beam-wave instabilities [5][6][7][8][9][10][11][12][13].…”