Multipole Electromagnet Layout for Stable Particle Beam Injection
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Solution Overview
Problem
The existing top-up injection schemes in particle accelerators suffer from incomplete orbit deflection, leading to oscillations of the stored beam, which cause perturbations in the photon flux, making it difficult to achieve precise injection and maintaining a stable dynamic aperture, especially in new storage rings with reduced dynamic apertures.
Innovation Solution
A multipole electromagnet design with a hollow duct and multiple wire conductors arranged in series, generating a magnetic field with a zero value at the center and peaks on either side, allowing for efficient deflection of injected beams into a dynamic aperture without disturbing the stored beam, thus improving injection precision and reducing oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a multipole electromagnet generates strong magnetic field peaks for efficient beam deflection, then injection quality improves, but the magnetic field may disturb the stored beam
Solution Approach 1:
The patent applies local quality by creating a magnetic field with highly non-uniform distribution: strong field peaks located precisely where needed for deflecting injected beams into the dynamic aperture, while maintaining a zero field region at the center where the stored beam passes. This allows different spatial zones to have different magnetic field strengths optimized for their specific functions.
Solution Approach 2:
The magnetic field is segmented into distinct functional zones: zero field region for stored beam transport, peak field regions for injected beam deflection, and intermediate regions for beam separation. The multipole configuration naturally divides the field into these segments, with field peaks positioned at specific radial distances from the center.
2Volume of moving object
If the dynamic aperture is reduced in new storage rings, then space efficiency improves, but it becomes difficult to achieve precise injection and maintain stable beam
Solution Approach 1:
The patent changes the magnetic field parameter distribution by using a multipole configuration that creates peak fields at specific locations. This allows the field strength to be optimized locally for injection precision without requiring a large overall dynamic aperture, as the strong peak fields can deflect beams precisely even when the available aperture is small.
3Device complexity
If dipole electromagnets are used for beam deflection, then the structure is simple, but the orbit deflection is incomplete causing beam oscillations
Solution Approach 1:
The patent employs a multipole electromagnet configuration that creates an asymmetric magnetic field distribution with peak fields at specific angular positions. This asymmetric field pattern provides more complete orbit deflection compared to symmetric dipole fields, reducing residual oscillations while maintaining reasonable structural complexity through the use of segmented conductor arrangements.
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 design enhances the uniformity of beam deflection, increases the quality of injection, and maintains a stable photon flux by minimizing the magnetic field at the stored beam's location, allowing for effective injection with reduced magnetic force and improved space efficiency.
Implementation Method 1
A multipole electromagnet design with a hollow duct and multiple wire conductors arranged in series, generating a magnetic field with a zero value at the center and peaks on either side
Implementation Method 2
allowing for efficient deflection of injected beams into a dynamic aperture without disturbing the stored beam
Data Source
AI summary
A multipole electromagnet for injecting particles, including a hollow duct extending along a longitudinal axis, and a plurality of wire conductors that are placed parallel or substantially parallel to the longitudinal axis along the duct, electrically connected in series and arranged to conduct electric current. The directions of the electric current flowing through the wire conductors are symmetric about a first plane of symmetry. The wire conductors are distributed in multiple carrier planes that are parallel or substantially parallel to the first plane of symmetry, including two main carrier planes that are symmetric about the first plane of symmetry and located outside the hollow, each main carrier plane carrying wire conductors that conduct the electric current in the first direction and wire conductors that conduct the electric current in the second direction opposite the first direction.