Combined-function magnet controller for compact particle beam transport
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Solution Overview
Problem
Conventional particle beam transport apparatuses become complicated and longer due to various electromagnets and monitors, leading to reduced controllability and irradiation accuracy of the rotary gantry, which supports the beam transport apparatus.
Innovation Solution
A particle beam transport apparatus with a vacuum duct, magnet controllers, and a scanning magnet, where the magnet controllers include deflection and quadrupole magnets arranged to simplify and shorten the beam transport path, and the scanning magnet is positioned downstream to deflect and converge the beam, reducing the size and weight of the rotary gantry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If various electromagnets and monitors are provided in the beam transport path to control the particle beam trajectory, then the beam control capability is improved, but the beam transport apparatus becomes complicated and longer
Solution Approach 1:
The patent combines multiple electromagnets (deflection magnet and quadrupole magnet) and monitors into an integrated magnet controller unit. This merging reduces the number of separate components and simplifies the overall apparatus structure while maintaining the capability to control beam trajectory through coordinated magnetic field adjustments.
Solution Approach 2:
The magnet controller is designed as a multi-functional device that performs both deflection and focusing functions simultaneously. The deflection magnet controls the beam direction while the quadrupole magnet focuses the beam, allowing a single integrated unit to handle multiple beam control tasks that would otherwise require separate devices.
2Measurement precision
If various electromagnets and monitors are provided in the beam transport path, then the beam control capability is improved, but the beam transport apparatus becomes longer
Solution Approach 1:
By integrating the deflection magnet and quadrupole magnet into a single magnet controller unit positioned at the same location, the patent eliminates the need for separate housing and mounting structures for each magnet. This spatial merging significantly reduces the overall length of the beam transport apparatus while preserving all necessary beam control functions.
Solution Approach 2:
The patent arranges the deflection and quadrupole magnets to operate in different spatial dimensions and functional planes within the same apparatus. The deflection magnet operates in one plane to control beam direction, while the quadrupole magnet operates in perpendicular planes to control beam focus, allowing compact integration without functional interference.
3Stability of the object's composition
If the rotary gantry is enlarged to support the complicated beam transport apparatus, then the support stability is improved, but the controllability of rotation and irradiation accuracy are reduced
Solution Approach 1:
The patent's integrated magnet controller design reduces the overall size and weight of the beam transport apparatus that must be supported by the rotary gantry. This size reduction allows the use of a more compact gantry structure that maintains support stability while being easier to rotate and control, directly addressing the contradiction between stability and ease of operation.
4Adaptability or versatility
If the beam transport path is made complicated and longer, then the beam control functions are enhanced, but the irradiation accuracy is reduced
Solution Approach 1:
The integrated magnet controller consolidates multiple beam control functions into a single compact unit, creating a shorter and simpler beam transport path. This reduces the number of potential error sources and alignment issues that would accumulate over a longer path, thereby improving irradiation accuracy while maintaining versatile beam control capabilities through the coordinated action of the deflection and quadrupole magnets within the integrated unit.
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 solution simplifies and shortens the beam transport path, improving the controllability and accuracy of particle beam irradiation, allowing for a smaller and lighter rotary gantry while maintaining efficient magnetic field generation and production efficiency.
Implementation Method 1
a deflection magnet configured to deflect the advancing direction of the particle beam along the bent portion
Implementation Method 2
a quadrupole magnet configured to converge the particle beam
Implementation Method 3
a scanning magnet configured to scan the particle beam by deflecting each bunch of the particle beam
Data Source
AI summary
A particle beam transport apparatus includes a vacuum duct, at least one magnet controller, and a scanning magnet. The vacuum duct is configured such that a particle beam advances through the vacuum duct. The magnet controller is disposed around a bent portion of the vacuum duct and is configured to control an advancing direction or shape of the particle beam. The scanning magnet is disposed on the downstream side of the magnet controller in the advancing direction and is configured to scan the particle beam by deflecting each bunch of the particle beam. The magnet controller includes a deflection magnet configured to deflect the advancing direction of the particle beam along the bent portion and a quadrupole magnet configured to converge the particle beam. The deflection magnet and the quadrupole magnet constitute a combined-function magnet arranged at the same point in the advancing direction.