Adjustable Permanent Magnet Quadrupole for Compact Beamlines
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Solution Overview
Problem
Existing multipole magnets, particularly quadrupole magnets, require expensive power supplies and cooling systems, making them costly and space-intensive for large-scale use in particle accelerator beamlines, where space and heat dissipation are constraints.
Innovation Solution
A quadrupole magnet design utilizing permanent magnets with adjustable magnetization angles and moveable ferromagnetic flux conducting members to produce a high-quality, adjustable magnetic field without the need for a power supply or cooling system, allowing for compact construction and reduced operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electromagnets are used in multipole magnet arrangements, then the magnetic field can be adjusted by controlling current, but expensive power supplies and cooling systems are required
Solution Approach 1:
The invention extracts and removes the power supply and cooling system components from the magnet assembly, replacing electromagnets with permanent magnets. This eliminates the need for external power supplies and cooling infrastructure while maintaining magnetic field functionality through permanent magnetization.
Solution Approach 2:
The invention changes the operational parameter from electric current control to mechanical position control. By moving permanent magnets relative to ferromagnetic poles, the magnetic field strength is adjusted through changes in magnetic circuit geometry rather than electrical parameters, eliminating the need for power supplies.
2Power
If electromagnets are used in multipole magnet arrangements, then the magnetic field can be generated, but cooling systems are required to remove heat from current carrying coils
Solution Approach 1:
The invention removes the current-carrying coils that generate heat, replacing them with permanent magnets. This extraction of the electromagnetic conversion component eliminates the primary heat source while maintaining magnetic field generation through permanent magnetization.
Solution Approach 2:
The invention converts the harmful heat generation issue into a benefit by using permanent magnets that generate magnetic fields without electrical resistance and associated heat. The permanent magnetization provides continuous magnetic field generation without thermal byproducts.
3Temperature
If cooling systems are added to multipole magnets, then heat can be removed, but additional space and running costs are incurred
Solution Approach 1:
The invention extracts and eliminates the entire cooling system infrastructure, including coolant plumbing or airflow systems. By removing the heat generation source (current-carrying coils), the cooling system becomes unnecessary, freeing up space and eliminating associated costs.
4Device complexity
If permanent magnets are used instead of electromagnets, then power supply and cooling systems are eliminated, but the magnetic field may be less adjustable
Solution Approach 1:
The invention introduces dynamic adjustability to permanent magnets by making them moveable relative to the ferromagnetic poles. This mechanical mobility allows continuous adjustment of magnetic field strength by changing the position of permanent magnets, providing adaptability comparable to electromagnets without requiring power supplies.
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
Enables the creation of a compact, adjustable magnetic field that can be used in space-restricted environments like tunnels, reducing costs and heat dissipation, while maintaining high magnetic field quality and adjustability.
Implementation Method 1
permanent magnets arranged to supply magnetomotive force to at least one of the plurality of ferromagnetic poles to produce a magnetic field along the pole plane in a beamline space between the poles
Implementation Method 2
plurality of ferromagnetic poles arranged in a pole plane
Implementation Method 3
at least one of the plurality of permanent magnets and the plurality of ferromagnetic flux conducting members is moveable in the pole plane relative to the plurality of ferromagnetic poles so as to vary the strength of the magnetic field in the beamline space
Data Source
Figure 1
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AI summary
A multipole magnet for deflecting a beam of charged particles, comprising a plurality of ferromagnetic poles arranged in a pole plane, and a plurality of permanent magnets arranged to supply magnetomotive force to at least one of the plurality of ferromagnetic poles to produce a magnetic field along the pole plane in a beamline space between the poles. The multipole magnet further comprises a plurality of ferromagnetic flux conducting members arranged to channel magnetic flux from at least one of the plurality of permanent magnets. At least one of the plurality of permanent magnets and the plurality of ferromagnetic flux conducting members is moveable in the pole plane relative to the plurality of ferromagnetic poles so as to vary the strength of the magnetic field in the beamline space. The multipole magnet is a quadrupole magnet comprising four ferromagnetic poles and two permanent magnets, wherein each of the two permanent magnets is associated with two of the poles to supply magnetomotive force thereto.