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Low-cost miniature Halbach magnet with adjustable magnetic field uniformity

A technology with uniformity of magnetic field and low cost, applied in magnets, magnetic objects, permanent magnets, etc., can solve the problems of heavy mass and cannot meet the real-time detection of scientific researchers, and achieve the effect of high quality and improved detection convenience

Inactive Publication Date: 2020-01-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the heavy weight of the traditional desktop low-field NMR instrument, the instrument can only be used in a fixed laboratory, and cannot meet the immediate detection needs of scientific researchers.

Method used

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  • Low-cost miniature Halbach magnet with adjustable magnetic field uniformity
  • Low-cost miniature Halbach magnet with adjustable magnetic field uniformity
  • Low-cost miniature Halbach magnet with adjustable magnetic field uniformity

Examples

Experimental program
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Embodiment Construction

[0023] The preferred technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] A low-cost, miniature Halbach magnet with adjustable magnetic field uniformity, including a main magnet 4, a center shimming 5, an end shimming (magnetic strip 7), an upper sealing cover 1, a lower sealing cover 2 and a casing of the magnet structure support 3.

[0025] The main magnet 4 is the main source of the static magnetic field, which is one of the important parameters to measure the detection performance of the low-field nuclear magnetic resonance instrument. It includes 8 magnets with a trapezoidal cross section (the first magnet 41) and 8 plate-shaped samarium-cobalt magnets (the second magnet 42), the magnets of two shapes are closely spaced and arranged to form a ring, such as image 3 , the magnetic field generated by the main magnet is located inside the ring.

[0026] The shimming structure is a new structu...

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PUM

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Abstract

The invention discloses a low-cost miniature Halbach magnet with adjustable magnetic field uniformity, which comprises a main magnet, a shimming structure and a magnet structure support piece, and ischaracterized in that the main magnet comprises eight magnets with trapezoidal sections and eight samarium-cobalt magnets with rectangular sections, and the magnets with two shapes are closely arranged at intervals to form a circular ring; the shimming structure is divided into end shimming and central shimming according to different functions; the magnet structure supporting piece is used for final assembly of magnets and comprises an upper sealing cover, a lower sealing cover, a guide opening and a shell. The magnetic field intensity of 1T can be realized, the total mass of the magnet is lower than 3kg, the portable development of a low-field nuclear magnetic resonance instrument is facilitated, and the requirement of instant detection of researchers is met.

Description

technical field [0001] The invention relates to a low-cost, miniature Halbach magnet with adjustable magnetic field uniformity, which belongs to the fields of permanent magnet design, processing, assembly and the like. Background technique [0002] With the maturity of low-field nuclear magnetic resonance technology, more and more fields have begun to use low-field nuclear magnetic resonance instruments. Unlike high-field NMR, which uses bulky and expensive superconducting magnets, low-field NMR mainly uses relatively low-cost rare-earth permanent magnets. Although the magnetic field performance of permanent magnets is weaker than that of superconducting magnets, with the new With the application of materials and the improvement of processing technology, the magnetic field performance of permanent magnets has been greatly improved, which can fully meet the use of low-field nuclear magnetic resonance instruments. [0003] At present, the permanent magnets used in low-field N...

Claims

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Application Information

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IPC IPC(8): H01F7/02G01R33/383
CPCG01R33/383H01F7/021H01F7/0221
Inventor 易红陆荣生杨晴倪中华
Owner SOUTHEAST UNIV
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