Magnetron Bellows Coating With Kick Pulse for RF LINAC Coupling
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Solution Overview
Problem
High-power RF LINAC systems face challenges in efficiently coupling RF power due to the need for additional hardware, increased cost, and complexity, particularly when attempting to operate at high powers within a vacuum environment, where multipactoring and cooling issues arise.
Innovation Solution
A system that injects RF power directly into RF LINACs by using a magnetic array with Hall-Effect regions and an elongated sputtering electrode material tube, generating high-power pulsed plasma magnetron discharges and configurable positive voltage kick pulses to achieve nanolayered coatings on three-dimensional surfaces, allowing for efficient ion flux control and reduced multipactoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional hardware is used to couple RF power into LINACs, then RF power coupling is achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines the RF power coupling function with the existing LINAC structure by directly coupling the RF power amplifier output to the LINAC cavity through a vacuum feedthrough, eliminating the need for separate waveguide components and reducing overall system complexity
Solution Approach 2:
The vacuum feedthrough serves multiple functions simultaneously: it provides RF power coupling, maintains vacuum isolation, and enables direct connection between the amplifier and LINAC cavity, reducing the need for multiple specialized components
2Power
If RF power is coupled into LINACs operating in vacuum environment, then high power operation is achieved, but multipactoring occurs
Solution Approach 1:
The patent applies magnetron sputtering coating to the LINAC cavity surfaces, converting the vacuum environment (which causes multipactoring) into a controlled deposition environment that creates protective coatings on surfaces, thereby eliminating multipactoring while maintaining high power operation
3Temperature
If RF power amplifiers are cooled in vacuum environment, then cooling is achieved, but vacuum seal must be broken
Solution Approach 1:
The system is divided into vacuum and atmospheric sections, with the RF power amplifier located in the atmospheric section where cooling can occur, while the LINAC cavity remains in the vacuum section, maintaining the vacuum seal while enabling effective cooling
Solution Approach 2:
A vacuum feedthrough acts as an intermediary component, providing thermal conduction path for cooling while maintaining vacuum isolation, allowing the RF power amplifier to be cooled from the atmospheric side without breaking the vacuum seal
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 approach enables high-quality film deposition, reduces multipactoring, and allows for efficient cooling and maintenance of RF power amplifiers without breaking the vacuum seal, leading to improved RF power coupling and reduced complexity in RF LINAC systems.
Implementation Method 1
A system is provided for depositing high-quality films for providing a nanolayered coating on a three-dimensional surface of an RF accelerator and associated superconducting cavities. The system includes a magnetic array comprising multiple sets of magnets arranged to have Hall-Effect regions that run lengthwise along a sputter target.
Implementation Method 2
The system further includes an elongated sputtering electrode material tube surrounding the magnetic array comprising multiple sets of magnets arranged to have Hall-Effect regions that run lengthwise along the sputter target.
Implementation Method 3
generating high-power pulsed plasma magnetron discharges and configurable positive voltage kick pulses to achieve nanolayered coatings on three-dimensional surfaces, allowing for efficient ion flux control and reduced multipactoring.
Data Source
AI summary
A system and associated method are described for depositing high-quality films for providing a coating on a three-dimensional surface such as an internal surface of a bellows structure. The system includes a magnetic array comprising multiple sets of magnets arranged to have Hall-Effect regions that run lengthwise along a sputter target. The system further includes an elongated sputtering electrode material tube surrounding the magnetic array comprising multiple sets of magnets arranged to have Hall-Effect regions that run lengthwise along the sputter target. During operation, the system generates and controls ion flux for direct current high-power impulse magnetron sputtering. During operation logic circuitry issues a control signal to control a kick pulse property of a sustained positive voltage kick pulse taken from the group consisting of: onset delay, amplitude and duration.