Compact Particle Accelerator Using Solid-State RF Drivers
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Solution Overview
Problem
Traditional particle accelerators are large, costly, and complex, limiting their availability for medical applications like proton-beam therapy due to size, weight, and operational constraints, making advanced cancer treatment inaccessible to many communities.
Innovation Solution
A compact particle accelerator design featuring multiple cavities powered by independent RF drivers with solid-state transistor sources, low-voltage power supply, and battery or commercial power options, enabling portable and handheld configurations capable of delivering medically usable beam power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional large-scale accelerator designs are used, then high beam power and medical treatment capability are achieved, but size, weight, and cost become prohibitively large
Solution Approach 1:
The accelerator is divided into multiple independent cavity modules (e.g., 6 cavities) that can be separately driven by solid-state RF amplifiers. Each cavity operates independently, allowing the system to achieve high beam power through cumulative effect while keeping individual components compact and manageable in size.
Solution Approach 2:
The invention transitions from traditional high-voltage (MW-level) operation to low-voltage operation using solid-state RF amplifiers operating at S-band frequencies. This parameter change enables compact accelerator design while maintaining clinically relevant beam energies (e.g., 250 MeV proton beam) through efficient RF-to-beam power conversion in multiple cavities.
2Power
If traditional high-voltage accelerators are deployed, then adequate beam energy for cancer therapy is provided, but operational complexity and infrastructure requirements increase
Solution Approach 1:
The invention replaces traditional high-voltage electrical systems and mechanical switching infrastructure with solid-state RF amplification systems. The solid-state RF amplifiers operate at standard S-band frequencies, eliminating the need for complex high-voltage power distribution, water cooling towers, and helium refrigeration systems, thereby reducing operational complexity.
Solution Approach 2:
The accelerator design uses universal S-band RF cavities that can be driven by commercial off-the-shelf solid-state RF amplifiers. This multi-functionality approach allows the same cavity design to achieve both compact size and high beam energy (250 MeV), while being compatible with standard RF equipment and power infrastructure.
3Reliability
If conventional accelerator infrastructure is used, then sufficient cooling and power supply are ensured, but installation requirements and facility constraints increase
Solution Approach 1:
The invention changes the operating parameters from high-voltage DC power supply to low-voltage RF power amplification at S-band frequencies. This enables the use of solid-state amplifiers that can be powered by standard electrical infrastructure, eliminating the need for specialized high-voltage power facilities and large water cooling systems, thereby increasing installation flexibility.
Solution Approach 2:
The invention extracts and eliminates the bulky infrastructure components (water cooling towers, liquid helium refrigerators, high-voltage power distribution systems) from the accelerator system. The solid-state RF amplifier-based design provides sufficient cooling and power supply through compact, integrated systems that can be installed in facilities without specialized infrastructure.
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
The compact design reduces size, weight, and cost, allowing for the distribution of advanced medical technologies to remote areas, providing accessible proton-beam therapy and increasing the availability of advanced medical care.
Implementation Method 1
two or more cavities disposed along an axis that are driven independently by solid-state transistor radio frequency (RF) sources
Implementation Method 2
two or more independent RF drivers, each with its own phase and amplitude control, independent of the other RF drivers
Data Source
AI summary
A compact particle accelerator can include two or more cavities disposed along an axis of the particle accelerator, each of which is coupled to two or more drivers. The accelerator can also include a power supply coupled to the two or more drivers such that a particle beam traveling along the axis is accelerated. The power supply can be an interface with a commercial power outlet, battery power, or a combination thereof depending upon the use case. Example configurations of the accelerator include hand held or mobile devices that are capable of delivering up to and greater than a 1 MeV electron beam.