Accelerator Control Device for Particle Beam Therapy
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Solution Overview
Problem
Particle beam therapy devices face the challenge of beam spikes, where the intensity of the charged particle beam exceeds target values immediately after acceleration, particularly when low-energy beams are emitted, leading to inefficiencies and potential inaccuracies in tumor treatment.
Innovation Solution
The implementation of an accelerator control device that includes a timing controller, high-frequency power controller, and a blocker controller to manage the timing and power supply of the charged particle beam, using pre-emission techniques and threshold value tables to prevent beam spikes by adjusting the blocker's operation based on current and charge amount or pulse width, ensuring stable beam delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a charged particle beam is accelerated to a desired energy by the accelerator, then the beam can be emitted for treatment, but beam spikes occur causing intensity to exceed target values
Solution Approach 1:
The blocker is operated in advance to block the charged particle beam before emission, removing excessive beam quantity from the accelerator. This preliminary action prevents beam spikes from occurring in the first place, ensuring that only the appropriate amount of beam is emitted for treatment.
Solution Approach 2:
The blocker extracts and removes the excessive portion of the charged particle beam from the accelerator before emission. By taking out the unnecessary beam quantity, the system achieves reliable intensity control while maintaining the desired beam energy for treatment.
2Reliability
If beam spikes are prevented by blocking the charged particle beam, then intensity control is improved, but treatment time increases
Solution Approach 1:
The blocker rapidly blocks and removes the excessive beam quantity in a quick operation, minimizing the time added to the treatment process. This allows the system to achieve reliable intensity control without significantly increasing overall treatment time.
3Reliability
If the blocker operates to remove excessive beam quantity, then beam spike prevention is achieved, but system complexity increases
Solution Approach 1:
The blocker serves multiple functions: it blocks the charged particle beam, removes excessive beam quantity, and prevents beam spikes. By consolidating these functions into a single device, the system achieves reliable intensity control without proportionally increasing complexity.
Solution Approach 2:
The controller operates the blocker based on detected beam conditions, using feedback to determine when blocking is necessary. This automated feedback control achieves reliable intensity control while minimizing the complexity of manual intervention.
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 effectively prevents beam spikes, maintaining consistent energy levels and reducing the risk of intensity fluctuations, thereby enhancing the precision and efficiency of particle beam therapy treatments.
Implementation Method 1
a high-frequency acceleration cavity including a plurality of electrodes is provided. The particle beam therapy device accelerates the charged particle beam to a desired energy by supplying high frequency power to the electrode provided in the high-frequency acceleration cavity
Implementation Method 2
a blocker which blocks the charged particle beam emitted from the accelerator, a current value detector which detects a current value of the charged particle beam circulating in the accelerator, and a controller which controls an operation timing of the blocker on the basis of the current value
Data Source
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AI summary
According to some embodiments, an accelerator control device has a high-frequency power controller and a timing controller. The high-frequency power controller supplies high frequency power for accelerating a charged particle beam to an accelerator. The timing controller controls an operation timing of a blocker that blocks the charged particle beam emitted from the accelerator based on a current value of the charged particle beam circulating in the accelerator.