Offset-Axis Coil Measurement for Inter-Coil Center Alignment
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Solution Overview
Problem
Existing methods fail to accurately measure and correct the inter-coil center position of split solenoid coils and combination coils relative to a reference plane, which is crucial for achieving symmetric radial-magnetic-field distribution and precise alignment in accelerators.
Innovation Solution
A magnetic field measuring method involving a magnetic field measuring element that rotates around an offset axis parallel to the coil axis, measuring radial-magnetic-field distributions before and after rotation to determine the inter-coil center position, allowing for precise alignment with a reference plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnetic field sensor is placed on the coil axis for measurement, then the measurement setup is simple, but the inter-coil center position cannot be determined
Solution Approach 1:
The patent moves the sensor rotation from the coil axis (zero offset) to a parallel offset axis at a specific distance. This dimensional change in the rotation path creates measurable radial magnetic field variations that encode the inter-coil center position information, achieving both reasonable setup complexity and accurate position determination.
Solution Approach 2:
The patent changes the measurement parameter by selecting a specific offset distance from the coil axis. This parameter change transforms the magnetic field measurement characteristics, creating a measurement regime where the radial field variations clearly indicate the inter-coil center position while maintaining practical setup simplicity.
2Stability of the object's composition
If the inter-coil center position is not accurately corrected, then the radial-magnetic-field distribution becomes asymmetric, but correcting it requires measuring a parameter that existing methods cannot measure
Solution Approach 1:
The patent solves the measurement difficulty by changing the rotation dimension from the coil axis to a parallel offset axis. This dimensional change enables the magnetic field sensor to detect radial field variations that directly indicate inter-coil center position, making the previously unmeasurable parameter accessible while ensuring magnetic field symmetry.
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 highly accurate determination and correction of the inter-coil center position, ensuring symmetric magnetic-field distribution and precise alignment, thereby improving the accuracy of charged particle acceleration processes.
Implementation Method 1
a magnetic field measuring element 2; a radial-magnetic-field measuring step of measuring, by the magnetic field measuring element 2, a radial magnetic field distribution along the offset axis 4 in a state where the magnetic field measuring element 2 is placed at the offset position
Data Source
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AI summary
An object of the present invention is to provide a magnetic field measuring method of highly accurately determining an inter-coil center position of a combination coil provided with a plurality of coils. The magnetic field measuring method of the invention includes: a first radial-magnetic-field measuring step of using a magnetic field measuring element (2) placed at an offset position apart from the coil axis (3), to thereby measure, at the offset position, first radial magnetic fields along an offset axis (rotation axis (4)) parallel to the coil axis (3); a second radial-magnetic-field measuring step of using the magnetic field measuring element (2) after being rotated by a set angle, to thereby measure, at the offset position, second radial magnetic fields along the offset axis; and a center-position determining step of determining the inter-coil center position, based on a first radial-magnetic-field characteristic (magnetic field distribution (64)) that is a characteristic in a direction of the offset axis of the first radial magnetic fields, and a second radial-magnetic-field characteristic (magnetic field distribution (65)) that is a characteristic in the direction of the offset axis of the second radial magnetic fields.