Quadrupole Electromagnet Layout for Compact Beam Separation
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Solution Overview
Problem
Conventional synchrotron beam output sections require a large separation distance between the circulating and output charged particle beams, which restricts design tolerance due to interference with electromagnets, particularly in the quadrupole electromagnet region, necessitating a lengthy straight line portion that limits the compactness and efficiency of the system.
Innovation Solution
The design incorporates a quadrupole electromagnet with an iron core featuring a main region and beam passing gaps, allowing the output beam to travel in a sub-vacuum duct separated from the circulating beam, thereby reducing interference and enabling a shorter straight line portion, and potentially eliminating the need for a septum electromagnet, thus enhancing design tolerance and reducing the installation area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the beam output section uses a conventional configuration with sequential electrostatic deflector, deflection electromagnet, quadrupole electromagnet, and septum electromagnet, then the charged particle beam can be properly deflected and separated, but the separation distance between beam circulating path and beam output path becomes excessively large, reducing design tolerance
Solution Approach 1:
The patent utilizes the vertical dimension by forming the beam passing gap in the upper or lower portion of the quadrupole electromagnet's iron core. This allows the beam output path to be positioned vertically separated from the beam circulating path, achieving sufficient separation distance without requiring excessive horizontal separation, thus resolving the contradiction between reliable beam separation and compact system layout.
Solution Approach 2:
The patent integrates the beam passing gap functionality directly into the quadrupole electromagnet's iron core structure. The beam passing gap is formed as an integral part of the iron core, allowing the beam output path to pass through the electromagnet itself rather than requiring separate dedicated space, thereby reducing the overall separation distance while maintaining beam separation quality.
2Reliability
If the straight line portion length LO from quadrupole electromagnet to septum electromagnet is increased to achieve sufficient beam path separation, then beam separation is improved, but the installation area and system complexity increase
Solution Approach 1:
By utilizing vertical separation through the beam passing gap positioned in the upper or lower portion of the iron core, the patent achieves adequate beam path separation without requiring increased horizontal distance between electromagnets, thus reducing the overall installation area while maintaining reliable beam separation.
Solution Approach 2:
The patent combines the beam separation function with the quadrupole electromagnet's existing structure by forming the beam passing gap within its iron core. This integration eliminates the need for additional separate separation structures or extended straight line portions, thereby reducing installation area while achieving the required beam path separation.
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 configuration achieves a sufficient separation distance between the beam paths, allowing for a more compact and efficient synchrotron design by shortening the straight line portion and potentially eliminating the septum electromagnet, thereby improving the beam output section's design tolerance and reducing the installation area.
Implementation Method 1
an output beam 2B traveling through the beam passing gap 26 is deflected away from a path 1A of the circulating beam 2A on which the circulating beam 2A travels in the main region 23 by a magnetic field N generated in the beam passing gap 26
Implementation Method 2
The iron core 20 has a main region 23, which is a gap, formed at a central position of the iron core 20 and four magnetic pole portions 25 protruding toward the main region 23 from a circumferential portion 24 of the iron core 20
Data Source
AI summary
To enable avoiding interference between a path of a separated charged particle beam and an electromagnet as well as providing a sufficient separation distance between: a path of a separated charged particle beam; and a path of a charged particle beam traveling in a main region. A quadrupole electromagnet includes: an iron core provided with a beam passing gap for travel of an output beam that is a separated charged particle beam, in addition to a main region for travel of a circulating beam that is a charged particle beam; excitation coils, and each wound around the iron core; a main vacuum duct, provided in a main region of the iron core, inside which the circulating beam travels; and a sub-vacuum duct, provided in the beam passing gap of the iron core, inside which the output beam travels.