Twisted Waveguide Accelerating Structure
نویسنده
چکیده
A hollow waveguide with a uniform cross section may be used for accelerating charged particles if the phase velocity of an accelerating mode is equal to or less than the fiee space speed of light. Regular straight hollow waveguides have phase velocities of propagating electromagnetic waves greater than the free-space speed of light. if the waveguide is twisted, the phase velocities of the waveguide modes become slower. The twisted waveguide structure has been modeled and computer simulated in 3-D electromagnetic solvers to show the slow-wave properties for the accelerating mode.
منابع مشابه
Investigation of Twisted Waveguides as Slow-Wave Structures
Twisted hollow waveguides with noncircular cross sections may be considered as slow-wave structures. In a twisted waveguide, propagating radio frequency (rf) waveguide modes can have phase velocities slower than those of similar modes in a straight waveguide. This property is interesting since a twisted waveguide basically has a uniform cross section along the propagation direction. In such a w...
متن کاملField analysis of a dielectric-loaded rectangular waveguide accelerating structure.
Recently, there has been some interest in planar or rectangular dielectric accelerating structures for future high-gradient linear accelerators. In this paper, we present a detailed analysis of the modes of a dielectric-loaded rectangular waveguide accelerating structure based on a circuit model approximation and mode matching method. In general, the acceleration field in a synchronous accelera...
متن کاملImproving the Thermal Characteristics of Semiconductor Lasers Using a New Asymmetric Waveguide Structure
Self-heating leads to a temperature rise of the laser diode and limits the output power and efficiency due to increased loss and decreased differential gain. To control device self-heating, it is required to design the laser structure with a low optical loss, while the heat flux must spread out of the device efficiently. In this study, a new asymmetric waveguide design is proposed and th...
متن کاملNonlinear properties of waveguides with twisted nematic liquid crystal
Optical reorientational nonlinearity in twisted nematic liquid crystalline planar waveguide is analyzed theoretically. It is shown that optical nonlinearity for guided modes in analyzed waveguides can be approximated by saturation nonlinearity. Predicted nonlinearity is large enough to observe e¤ects like spatial solitons formation with milliwatts of light power. PACS: 42.65.Wi, 42.70.Df
متن کاملResonances in Twisted Quantum Waveguides
In this paper we consider embedded eigenvalues of a Schrödinger Hamiltonian in a waveguide induced by a symmetric perturbation. It is shown that these eigenvalues become unstable and turn into resonances after twisting of the waveguide. The perturbative expansion of the resonance width is calculated for weakly twisted waveguides and the influence of the twist on resonances in a concrete model i...
متن کامل