Cyclotron Orbit Alignment via First Harmonic Coils
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Solution Overview
Problem
Existing methods for adjusting particle orbit alignment in cyclotrons are not flexible enough for real-time adjustments during operation and debugging, and are heavily dependent on designer experience, with magnetic field errors affecting particle trajectory.
Innovation Solution
A method using a first harmonic in a cyclotron, achieved by placing eight coils symmetrically around the magnetic field extreme points, applying currents to generate independent harmonics, and adjusting their magnitude and direction in real-time based on beam detection feedback to align the particle trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If particle alignment is optimized by adjusting the geometry of DEE plate or position of ion source, then alignment accuracy is improved, but real-time adjustment capability is lost and adjustment flexibility is reduced
Solution Approach 1:
The patent transforms the static alignment adjustment method into a dynamic one by introducing adjustable coils that can generate magnetic fields in real-time. The coils are connected to power sources that can be adjusted during operation, allowing the equilibrium orbit to be dynamically shifted to correct alignment errors without physical modifications to the DEE plate or ion source position.
2Manufacturing precision
If magnetic field strength is increased to improve particle trajectory control, then trajectory accuracy is improved, but magnetic field installation errors have greater influence on particle trajectory
Solution Approach 1:
The patent changes the magnetic field parameters by introducing additional coils that can generate adjustable magnetic fields. Instead of relying solely on the fixed main magnetic field, the system uses adjustable coil currents to create compensating fields that can correct trajectory deviations caused by installation errors, thereby reducing their harmful influence while maintaining trajectory accuracy.
3Device complexity
If traditional alignment adjustment methods are used, then structural complexity is minimized, but adjustment flexibility and real-time operation capability are reduced
Solution Approach 1:
The patent introduces coils as intermediary elements between the power sources and the particle beam. These coils act as mediators that convert electrical energy into magnetic fields, which then influence the particle trajectory. This intermediary approach allows flexible adjustment of particle alignment without directly modifying the complex accelerator structure, thereby maintaining relatively simple device architecture while achieving high adjustment flexibility.
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 method allows for real-time, high-accuracy adjustments of particle orbit alignment, increasing flexibility and reducing the impact of magnetic field errors, enabling precise alignment during operation and debugging.
Implementation Method 1
providing eight identical coils in the vicinity of an extreme point of the magnetic field of the cyclotron... the four coils in the first group of coils together generating a first independent harmonic, the four coils in the second group of coils together generating a second independent harmonic
Implementation Method 2
the magnetic field cannot reach an ideal value due to errors in magnet installation... which will more or less influence particle trajectory
Data Source
AI summary
The invention discloses a method for adjusting particle orbit alignment by using a first harmonic in a cyclotron, including the following steps: generating a correcting magnetic field through eight coils symmetrically about the middle plane; arranging the positions of the coils and the currents applied, so that they can generate a first harmonic of which the amplitude and phase are arbitrarily adjustable; according to the actual eccentricity of the particle orbit, adjusting the magnitude and direction of the currents applied to the coils, and optimizing the alignment of the particle trajectory. By controlling an external DC power source of the accelerator and combining the real-time feedback of the beam detection of the accelerator, the invention may perform real-time adjustment during the debugging and operation of the accelerator, with high feasibility and operability; compared with traditional methods, the invention may achieve real-time adjustment during the debugging and operation of the accelerator.