Particle Beam Irradiation System with Rapid Energy Stage Control
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Solution Overview
Problem
The existing particle beam irradiation systems face challenges in rapidly updating the operation cycle and controlling beam energy changes during multistage extraction operations, leading to reduced dose rates and prolonged treatment times due to beam loss and interruptions.
Innovation Solution
A particle beam irradiation system with a control system that implements rapid energy changes by using a multistage extraction operation with pre-defined control data for bending and sextupole magnets, allowing direct transition to deceleration control and minimizing beam loss, enabling efficient beam utilization and cycle updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multistage extraction operation is used to control beam energy changes, then beam energy control capability is improved, but operation cycle update time increases
Solution Approach 1:
The patent applies preliminary action by pre-defining multiple operation cycles with different beam energy stages before actual irradiation begins. The control system stores these pre-configured operation cycles and can directly switch between them during treatment, eliminating the need to recalculate and reconfigure parameters in real-time. This allows rapid energy stage changes while maintaining comprehensive beam energy control capability.
2Ease of operation
If operation control data integrates all energy ranges, then control simplification is improved, but beam charge utilization deteriorates
Solution Approach 1:
The patent segments the operation control data into multiple independent operation cycles, each configured for specific beam energy stages and corresponding irradiation fields. Instead of using a single integrated operation cycle that processes all energy ranges, the system divides the treatment into discrete stages. Each operation cycle contains only the necessary control data for its specific energy stage, allowing the control system to switch between segments based on treatment requirements. This segmentation prevents beam charge exhaustion while maintaining operational simplicity through standardized cycle templates.
3Loss of time
If direct transition from extraction control to deceleration control is implemented, then treatment time is reduced, but beam loss increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring operation cycles that include both extraction control data and deceleration control data in a coordinated sequence. The deceleration control parameters are calculated and stored in advance alongside the extraction control parameters, ensuring smooth transitions. This pre-synchronization of control data allows direct transition between extraction and deceleration control without intermediate steps, reducing treatment time while preventing beam loss through properly timed and parametered transitions.
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 rapid energy stage changes, reduces beam loss, and improves dose rates, thereby shortening treatment times and enhancing the efficiency of beam utilization.
Implementation Method 1
a synchrotron is adopted as an ion beam generator for controlling changes in beam energy
Implementation Method 2
control data about component devices making up the synchrotron including ... bending magnet
Implementation Method 3
control data about component devices making up the synchrotron including ... sextupole magnet
Data Source
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AI summary
The operation control data 70 about the component device constituting the synchrotron 13 are structured to include an initial acceleration control data item 701, a plural extraction control data items 702, a plural energy change control data items 705 that connect the plural extraction control data items 702. The plural extraction control data items 702 include extraction condition setting data items 703 and extraction condition cancellation data items 704 corresponding to the plural extraction control data items 702. As a result, a particle beam irradiation system capable of controlling changes in beam energy, updating operation cycle, and extracting beam in a short time can be provided.