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This paper presents the theory and design of a novel, low-power, compact, room-temperature, tunable, solid state THz source of Smith-Purcell radiation. The design comprises a Transferred Electron Device and a metal transmission grating separated by a high-K dielectric. When a sufficiently high electric field is applied across the cathode and anode of the device, space-charge regions (also known as...
This paper described the 3D simulation method and results of electron gun and beam transport for the 0.14THz TWT with the help of CST. The hot test results show that the design of the electron beam optics system satisfied the need of the TWT. It bases the manufacture of the 0.14THz travelling wave tube.
The development of terahertz power amplifiers presents significant new challenges as it brings into focus design, fabrication, and measurement issues that are not important factors at lower frequencies. In this paper, we describe our design approach to meet these challenges with particular emphasis on a 0.67 THz Extended-Interaction Klystron (EIK). This device is being designed to generate a peak...
We present the first steps for the validation of a field emission array (FEA) adapted to the modulation of electron beams at THz frequencies. This specific cathode relies on the coupling of an infrared dual-frequency laser (Deltaf~1THz) with a field emitter array composed of Multi-Wall Carbon Nanotubes. Thanks to the pre-modulation of the electronic beam, increased powers are expected for the Traveling...
The two major components, sheet beam electron gun and interaction circuit, consisting the 0.5 THz Smith-Purcell device under development are being investigated in separate diagnosis systems. The thermionic cathode showed the required emission current density of 50 A/cm2 and assembled into the electron gun. The interaction circuit fabricated by laser machining is being investigated using the precise...
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