Customizable RF Signal Generation for Particle Accelerators
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Solution Overview
Problem
Current electron linear accelerators have limited customization capabilities for electron pulses, leading to wasted energy and increased electrical stress, and require complex procedures to produce specific waveforms, with constant amplitude RF signals restricting achievable output waveforms.
Innovation Solution
A particle accelerator system incorporating computer processors, data storage, an arbitrary waveform generator, and a pulse forming network with switchable stages, allowing for customizable waveform and duration generation of pulsed RF signals, enabling the production of varied pulse durations and waveforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If constant amplitude RF signals are used to accelerate electrons, then the RF system operates simply and reliably, but the output waveforms are restricted and cannot be customized
Solution Approach 1:
The RF signal generation system is segmented into multiple independent components: an arbitrary waveform generator that creates customizable waveforms, a pulse forming network with multiple switchable stages that shapes and times the pulses, and amplifiers that boost the signal. This segmentation allows each component to be optimized independently, enabling waveform customization without overwhelming system complexity.
Solution Approach 2:
The system transitions from static constant amplitude RF signals to dynamic customizable waveforms. The arbitrary waveform generator and pulse forming network with controllable switches enable the RF signal characteristics (amplitude, duration, shape) to be dynamically adjusted based on experimental requirements, providing adaptability while maintaining manageable complexity through modular design.
2Duration of action of moving object
If pulse forming networks are used to generate output pulses with shorter pulse durations than the pulse duration of electrical pulses from the pulse forming network, then customized short pulses are achieved, but energy is wasted and electrical stress increases
Solution Approach 1:
The arbitrary waveform generator pre-calculates and generates the precise waveform pattern needed before the pulse forming network executes the pulse generation. This preliminary action ensures that the pulse forming network receives exact instructions for the required pulse duration, allowing it to optimize energy delivery and avoid wasting energy by maintaining the full pulse duration regardless of actual requirements.
Solution Approach 2:
The system enables dynamic changing of pulse duration parameters through the pulse forming network's switchable stages and the arbitrary waveform generator's programmable output. By allowing the pulse duration parameter to be precisely adjusted and changed based on experimental needs, the system avoids the energy waste associated with fixed-duration pulses that exceed the actual required duration.
3Adaptability or versatility
If complicated procedures are used to produce output pulses of having a particular waveform, then specific waveforms are achieved, but the operational complexity and time increase
Solution Approach 1:
The system replaces manual, mechanical adjustment procedures with automated electronic control. The arbitrary waveform generator uses software-programmable waveforms to define pulse characteristics, and the pulse forming network uses electronically controlled switches instead of manual mechanical adjustments. This substitution dramatically simplifies operation while maintaining the ability to produce specific waveforms, as users can programmatically define any desired waveform without complex manual procedures.
4Adaptability or versatility
If the pulse forming network is configured for fixed pulse durations, then the hardware design is simplified, but the ability to generate varied pulse durations is limited
Solution Approach 1:
The pulse forming network is divided into multiple switchable stages, each capable of being independently controlled. This segmentation allows the network to be configured for different pulse durations by selectively activating or deactivating specific stages through electronic switches, providing pulse duration variability without requiring complete hardware redesign for each duration setting.
Solution Approach 2:
The pulse forming network transitions from a static fixed-configuration design to a dynamic reconfigurable design. The switchable stages allow the network to dynamically adjust its effective duration and characteristics based on the required pulse duration, enabling varied pulse durations while managing complexity through electronic control rather than multiple fixed hardware configurations.
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 solution allows for rapid customization of electron pulses, reducing energy waste, electrical stress, and maintenance needs, while increasing the flexibility of particle accelerators in simulating diverse radiation environments and extending their operational lifespan.
Implementation Method 1
The arbitrary waveform generator is for determining a waveform and a duration for a pulsed RF signal based on the attenuation profile; and generating the pulsed RF signal having the waveform and the duration
Implementation Method 2
The PFN is for generating an amplified pulsed RF signal based on the pulsed RF signal, where the duration of the amplified pulsed RF signal is based on one or more settings of the plurality of PFN switches
Implementation Method 3
The one or more amplifiers include a pulse forming network (PFN). The pulse forming network includes a plurality of PFN stages, where a PFN stage of the plurality of PFN stages includes one or more capacitors and one or more inductors
Implementation Method 4
A set of tuned microwave cavities forms the acceleration guides that are driven by an oscillating electric field. The oscillating electric field can be amplified RF energy, typically having wave forms or wave shapes of constant-amplitude sine-waves. Then the additional energy from the field accelerates the electrons and increases the electrons' relative mass until they reach the desired energy
Data Source
AI summary
Methods and apparatus are provided for generating an amplified pulsed radio frequency (RF) signal used by a particle accelerator. The particle accelerator can generate an attenuation profile. The particle accelerator can determine a waveform and a duration for a pulsed RF signal based on the attenuation profile. The particle accelerator can generate the pulsed RF signal having the waveform and the duration. The particle accelerator can generate an amplified pulsed RF signal using one or more amplifiers of the particle accelerator. The amplifiers can include a pulse forming network (PFN), where the PFN can include a plurality of stages and a plurality of PFN switches, and where PFN stage can include one or more capacitors and inductors. The PFN switches can control the PFN stages. The duration of the amplified pulsed RF signal can be based on settings of the plurality of PFN switches.