Charged Particle Beam Shaping with Quadrupole-Octupole Control
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Solution Overview
Problem
Conventional charged particle beam management systems struggle to precisely match beam profiles to target dimensions while ensuring precision in beam alignment, leading to potential damage or destruction of targets and system components.
Innovation Solution
A system utilizing a sequence of quadrupole and octupole magnets, along with collimators and a control system, to independently control beam dimensions and ensure uniform distribution, adjusting magnetic field strengths based on real-time beam feedback to achieve a desired beam shape and size at the target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional beam management systems are used, then beam alignment precision is maintained, but beam profile matching to target dimensions is limited
Solution Approach 1:
The beam management system is divided into multiple independent quadrupole magnet assemblies (first, second, third, and fourth assemblies) that can independently control beam dimensions in different directions. Each assembly can be adjusted separately to achieve precise matching of beam profile to various target dimensions, resolving the contradiction between precision and adaptability.
Solution Approach 2:
The quadrupole magnet assemblies are designed with adjustable magnetic field strengths that can be dynamically modified during operation. This allows the system to adapt beam dimensions in real-time to match different target sizes and shapes, enabling both high precision and versatility across multiple target configurations.
2Productivity
If high-power charged particle beams are used, then production efficiency is improved, but damage to target and system components increases
Solution Approach 1:
The beam is divided into multiple controllable segments through separate quadrupole magnet assemblies that independently manage beam dimensions in different directions. This segmentation allows high-power beams to be precisely shaped to match target dimensions, concentrating power where needed while avoiding damage to surrounding components.
Solution Approach 2:
The system applies different magnetic field strengths to different regions of the beam through independently adjustable quadrupole assemblies. This creates local quality variations in beam intensity and distribution, ensuring high power density is delivered precisely to the target area while minimizing exposure and damage to adjacent system components.
3Manufacturing precision
If beam expansion is applied to match target size, then uniform distribution is achieved, but beam alignment precision deteriorates
Solution Approach 1:
Beam expansion is achieved through multiple independent quadrupole magnet assemblies rather than a single expansion element. Each assembly can be independently adjusted to control beam dimensions in specific directions, maintaining alignment precision while achieving uniform distribution across the target surface.
Solution Approach 2:
The system changes magnetic field strength parameters in the quadrupole assemblies to control beam expansion and contraction in different directions. By independently adjusting these parameters, the system achieves uniform beam distribution across the target while maintaining precise alignment through coordinated control of all assemblies.
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 system effectively transforms high-power charged particle beams into uniform, rectangular or square profiles that match target dimensions, enhancing efficiency and safety by minimizing undesired activation and damage.
Implementation Method 1
passing a charged particle beam that is received from an accelerator and initial beam path elements through a first assembly of quadrupole magnets in which the orientation and magnetic field strength are configured to cause the beam to expand preferentially in a first direction and contract in a second direction
Implementation Method 2
passing the beam after exiting the first assembly of quadrupole magnets through a first octupole magnet that is configured to redirect particles towards a center portion of the beam
Data Source
AI summary
Various embodiments include a charged particle beam management and control system for manipulating and controlling a beam of charged particles output from an accelerator to roughly match the size and shape of an irradiation target. Various embodiments achieve dynamic and flexible control of the beam shape at the target by using two octupole magnets in combination with a system of quadrupole magnets that shape the beam before entering each of the two octupole magnets. The magnetic fields of the quadrupole magnets are dynamically controlled by a computer processing system that receives information from beam sensors at or near the target to maintain beam shape and spread at the target. The system allows for the creation and maintenance of a uniform and square or rectangular beam profile at the target, suitable for applications such as isotope production and irradiation. The system is adaptable to different beam types, sizes, and shapes.