Klystron Cavity Gap Correction for Stable Multi-Beam Orbits
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Solution Overview
Problem
In multi-beam klystron devices, non-axisymmetric electric field distributions cause fluctuations in electron beam orbits, leading to decreased operating efficiency and output conversion efficiency due to unequal cavity resonator voltages and electric field intensity changes.
Innovation Solution
The implementation of electric field correction sections and cavity resonator voltage correction sections in the cavity resonators to make the electric field and voltage distributions axisymmetric with respect to the electron beam axis, using projections and recesses to adjust the gap and voltage configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cavity resonator voltages in radial and circumferential directions are unequal, then the cavity resonator structure is simpler, but energy dispersion increases and output conversion efficiency decreases
Solution Approach 1:
The patent applies asymmetry by intentionally introducing asymmetric electric field correction sections into the cavity resonator structure. These correction sections create controlled asymmetric electric field distributions that compensate for the inherent non-axisymmetric voltage distribution, thereby reducing energy dispersion while maintaining structural simplicity.
Solution Approach 2:
The patent changes the electric field distribution parameters by adding correction sections with specific geometries (protrusions or recesses) that modify the local electric field intensity. This parameter adjustment equalizes the cavity resonator voltages between radial and circumferential directions, reducing energy dispersion without complicating the overall structure.
2Power
If electric field intensity distribution changes greatly, then the cavity resonator can handle higher power, but electron beam orbit fluctuates and operating efficiency decreases
Solution Approach 1:
The patent applies local quality by adding electric field correction sections at specific locations within the cavity resonator where the electric field intensity varies most. These localized corrections create regions of modified electric field strength that compensate for excessive variations, thereby stabilizing electron beam orbits while preserving the overall high power handling capability.
Solution Approach 2:
The electric field correction sections act as intermediaries between the high power cavity resonator structure and the electron beam. These correction sections mediate the interaction by modifying the electric field distribution to reduce abrupt changes, thereby stabilizing electron beam orbits without reducing the overall power handling capacity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This correction enhances electron beam stability, reducing energy dispersion and improving operating efficiency and output conversion efficiency by making the electric field and voltage distributions uniform and symmetric.
Implementation Method 1
electrons are accelerated and decelerated by the phase of high frequency input to the input cavity so that velocity is modulated
Implementation Method 2
An electron beam from the electron gun section enters the input cavity
Implementation Method 3
a focusing magnetic field device to focus the electron beam
Data Source
AI summary
According to one embodiment, a klystron device includes a klystron body and a focusing magnetic field device. The klystron body has an electron gun section, a collector section, a plurality of cavity resonators, and a plurality of drift tubes. The cavity resonators have nose sections that face each other in an axial direction and form a gap section that is connected to the drift tubes. At least one of the cavity resonators has an electric field correction section in a part of the nose section that makes a space of the gap section different with respect to a space between the nose sections.