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Novel method for achieving uniform strong static magnetic field in free space

A free space, static magnetic field technology, applied in the direction of using the magnetic field generated by the coil, magnetic resonance measurement, etc., to achieve the effect of compact geometric size and uniform magnetic field

Active Publication Date: 2015-03-18
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

But this method also has great limitations. Based on this technology, in order to achieve a strong magnetic field in a given space area, the size of the device must be made very large (to achieve a magnetic field above 50T, the inner and outer radius of the device Geometric size ratio should be greater than 50)

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  • Novel method for achieving uniform strong static magnetic field in free space
  • Novel method for achieving uniform strong static magnetic field in free space
  • Novel method for achieving uniform strong static magnetic field in free space

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0018] Such as figure 1 As shown, the device is a two-dimensional device (the magnetic field is in the plane when it works), and it is a ring structure (corresponding to 1-1). exist R 1 r R 2 The region 1-1 is filled with anisotropic non-uniform magnetic material, and the parameter distribution of the material is: mu r =( r - R 2 ( R 1 - R 3 ) / ( R 2 - R 3 )) / r , mu θ =1 / mu r . mu r represents the radial component of the permeability, mu θ Indicates the tangential component of permeability. Material distribution and device geometry R 1 , R 2 related. Also with the parameter R 3 related( R 3 Indicates a virtual radius, which is a parameter introduced in the theoretical design, there is no actual geometric radius and its corresponding), the parameter R 3 Determines the magnetic field enhancement factor that the device can achiev...

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Abstract

The invention relates to a novel method for achieving a uniform strong static magnetic field in free space. The conventional method is difficult to achieve a very strong static magnetic field in free space. The novel method takes a ring-shaped component in two-dimensional space as a static magnetic field intensifier, aeolotropic non-uniform magnetic material with negative permeability is filled in the ring-shaped component, and the inner and outer areas outside the ring-shaped component are full of air; a low-intensity static magnetic field with homogeneous background is applied in the whole environment, in which the ring-shaped component is positioned; and therefore, the uniform strong static magnetic field can be achieved in the inner area outside the ring-shaped component. The novel method can achieve 50T or higher intensity magnetic fields that cannot be achieved by adopting the prior art in large free space.

Description

technical field [0001] The invention belongs to the application field of electromagnetic field and electromagnetic wave, and relates to a passive static magnetic field enhancer capable of realizing a strong uniform static magnetic field in a large free space area. Background technique [0002] Achieving a strong magnetic field in free space plays a very important role in scientific research, medical treatment, military and other fields. In medicine, the static magnetic field has played a very important role in symptom checking, treatment and medical research. For example: transcranial magnetic stimulation is a method of passing a magnetic field through the human brain, which can be used to study brain science and treat brain-related diseases. However, limited by the strength of the magnetic field, it cannot be made very high, so that the magnetic field can only penetrate to the surface cortex area of ​​the human brain. As for the deeper areas of the human brain, the basal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N2/02G01R33/38
Inventor 孙非何赛灵
Owner ZHEJIANG UNIV
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