Integrated Shielding Body for Superconducting Accelerators
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Solution Overview
Problem
The challenge in superconducting accelerators is the deformation of magnetic and radiation shields when installed in a narrow space, as the thermal deformation of these components can lead to changes in shield properties, making handling and installation difficult, and existing solutions do not effectively manage this issue.
Innovation Solution
A shielding body comprising a magnetic shield with a plate shape and a radiation shield formed as a film on its surfaces, made of materials with higher thermal conductivity than the magnetic body, allowing for easy installation and reduced thickness, with the radiation shield being easily deformable to follow thermal changes and balance thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the vacuum vessel is downsized to reduce manufacturing and construction costs, then the space for installing shields is reduced, but the magnetic shield and radiation shield must still be installed in a very narrow space which causes deformation and changes in shield properties
Solution Approach 1:
The patent combines the magnetic shield and radiation shield into a single integrated shielding body. The magnetic shield portion and radiation shield portion are formed as a unified structure, eliminating the need for separate installation of two shields and reducing the overall space requirement while maintaining both shielding functions simultaneously
Solution Approach 2:
The radiation shield portion is formed as a thin film on the magnetic shield portion. This thin film structure reduces the overall thickness of the shielding body, allowing it to be installed in narrow spaces without causing deformation, while still providing effective radiation shielding
2Reliability
If the magnetic shield and radiation shield are separately provided, then each shield can be optimized for its specific function, but the thickness dimension of the entirety of the shielding body increases and handling becomes difficult
Solution Approach 1:
The patent merges the magnetic shield and radiation shield into a single integrated shielding body, improving handling ease by treating them as one component rather than two separate shields that must be individually handled and installed
Solution Approach 2:
The radiation shield is formed as a thin film on the magnetic shield, significantly reducing the overall thickness of the shielding body. This makes the shielding body more manageable and easier to install in confined spaces while maintaining both shielding functions
3Temperature
If the shielding body is cooled, then thermal stress is generated in the magnetic shield portion and radiation shield portion due to difference in thermal contraction amount, but this causes warping of the shielding body
Solution Approach 1:
The radiation shield portion is formed as a thin film on the magnetic shield portion. This thin film structure has high flexibility and can easily deform to follow the thermal contraction of the magnetic shield during cooling, preventing warping of the overall shielding body while maintaining the integrated structure
Solution Approach 2:
The patent changes the physical state and properties of the radiation shield by forming it as a thin film with different thermal contraction characteristics compared to a bulk structure. This parameter change allows the radiation shield to accommodate thermal stress during cooling without causing warping
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 reduces the thickness of the shielding body, simplifies handling, and effectively suppresses deformation, maintaining a sufficient shield property while allowing for space-saving and efficient cooling, thereby addressing the issue of thermal stress and warping in the shielding body.
Implementation Method 1
The magnetic shield is usually configured of a magnetic body and performs shielding by bypassing and absorbing the magnetism in a shield space
Implementation Method 2
The radiation shield is cooled with a refrigerant (liquid helium, liquid nitrogen, or the like) and absorbs the radiant heat just before the superconducting accelerator
Implementation Method 3
a superconducting acceleration cavity formed of a superconducting material is cooled by a refrigerant such as liquid helium and made to be superconductive, whereby electric resistance becomes almost zero
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
This shielding body (4) for shielding from geomagnetism and radiant heat comprises: a magnetic shield portion (11) having a plate shape formed from a magnetic body; and a radiation shield portion (15) formed as a film on at least one among outer and inner surfaces (11a) in the magnetic shield portion (11), and formed from a material having a greater heat conductivity than the magnetic body.