Slow wave structure used for X-waveband space travelling wave tube
A technology of slow wave structure and traveling wave tube, applied in the field of slow wave structure, can solve the problems of self-excited oscillation and low electronic efficiency of the traveling wave tube, and achieve the effect of improving the total efficiency
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[0019] 1) According to the technical index requirements of the tube, select the cathode current I k =60mA, slow wave voltage V 0 =3900V, calculate the physical parameters such as the speed of the electron beam, the power of the high-frequency input signal, the phase velocity, the wavelength of the guided wave, the reduction ratio, the axial phase constant and the radial phase constant;
[0020] 2) Calculate the average radius and channel radius of the helix, select a high-purity vacuum-smelted molybdenum helix of 0.13mm×0.26mm, a Monel tube shell with an inner diameter of R=1.9mm, and a wedge-shaped BeO99 clamping rod with good thermal conductivity. The cross-sectional view of the wave assembly structure is shown in figure 1 shown;
[0021] 3) Take λ p / L=3.5, get L=λ p / 3.5=7.03mm, to determine the magnetic field period is 7.0mm, where λ p = 3.592 × 10 - 2 ...
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