Adjustable Magnetic Multipole for Plasma Laser Acceleration
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Solution Overview
Problem
Existing magnetic multi-poles, such as those used in plasma laser acceleration systems, face challenges in achieving strong magnetic field gradients and compactness while maintaining structural compatibility with the system's components, particularly in containing highly divergent beams and accommodating laser beams or particles effectively.
Innovation Solution
A magnetic multi-pole design featuring permanent magnet parts and ferromagnetic material parts arranged around a central point in an alternating manner, with peripheral magnets mounted for rotation, allowing for adjustable magnetic field gradients through controlled rotation of these magnets, enhancing compactness and beam alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional magnetic multi-pole designs are used, then structural simplicity is maintained, but the magnetic field gradient is insufficient and compactness is reduced
Solution Approach 1:
The magnetic multi-pole is segmented into N permanent magnet parts and N ferromagnetic material parts arranged alternately around a central point. This segmentation allows each part to contribute to the overall magnetic field gradient while maintaining a compact configuration, resolving the contradiction between achieving strong magnetic field gradient and keeping the device size small.
Solution Approach 2:
The invention uses a composite structure combining permanent magnet parts and ferromagnetic material parts. The permanent magnets provide the magnetic field while the ferromagnetic materials concentrate and shape the field lines, creating a synergistic effect that achieves high magnetic field gradient in a compact volume.
2Force
If the magnetic multi-pole structure is made more complex to increase magnetic field gradient, then the gradient improves, but structural compatibility with plasma laser acceleration system components is reduced
Solution Approach 1:
The magnetic multi-pole design incorporates hollows between the alternating permanent magnet and ferromagnetic material parts that can accommodate laser beams or particles. This multi-functional design allows the device to serve both as a magnetic field generator and as a component compatible with plasma laser acceleration systems, maintaining adaptability while achieving high magnetic field gradient.
3Adaptability or versatility
If peripheral permanent magnets are added for adjustment capability, then magnetic field gradient variability increases, but device complexity increases
Solution Approach 1:
Peripheral permanent magnets are mounted on rotatable supports, allowing dynamic adjustment of their angular positions. This dynamic configuration enables continuous variation of the magnetic field gradient by rotating the peripheral magnets to different angles, providing adaptability without requiring complete structural redesign.
Solution Approach 2:
The peripheral permanent magnets are integrated into the existing alternating arrangement of permanent magnet and ferromagnetic material parts. This merging approach combines the adjustment functionality with the core magnetic field generation structure, increasing adaptability while minimizing additional complexity.
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 design achieves a strong magnetic field gradient variability of approximately 50% and a maximum gradient greater than 200 T/m, maintaining system compactness and compatibility with plasma laser acceleration systems, enabling efficient beam containment and alignment.
Implementation Method 1
N permanent magnet parts arranged, along a section plane, around a central point... N ferromagnetic material parts, arranged, along the section plane, around the central point
Implementation Method 2
N ferromagnetic material parts, arranged, along the section plane, around the central point
Implementation Method 3
peripheral permanent magnets, each peripheral permanent magnet being mounted in rotation around an axis of rotation of its own
Data Source
Figure 1~2
Figure 3~4
Figure 5~8
AI summary
The present invention relates to a magnetic multipole(1) including: N permanent magnet portions (2) (N=4 in the figure of the abstract) arranged, along a sectional plane, around a central point (3), N being a positive integer no lower than 2, N portions (4) of a ferromagnetic material arranged, along the sectional plane, around the central point (3), the permanent magnet portions (2) and the ferromagnetic portions (4) being contained in the sectional plane in an annular area (5) around the central point (3) while being distributed alternately in the annular area (5), and peripheral permanent magnets (6), each peripheral permanent magnet (6) being mounted such as to be rotatable about an axis of rotation (7) which is specific thereto and is located beyond the annular area (5) relative to the central point (3). The invention is useful in particle accelerators.