Magnetic circuit for detecting chip through nuclear magnetic resonance microscope
A technology of microscopic detection and nuclear magnetic resonance, which is applied to measuring devices, permanent magnets, and measuring magnetic variables. Effects of magnetic field uniformity and strength, low manufacturing and maintenance costs
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[0018] The present invention will be further described below in conjunction with the accompanying drawings.
[0019] Such as Figure 1-3 The magnetic circuit shown for the nuclear magnetic resonance microscopic detection chip includes a first permanent magnet 101, a first shim plate 201, a second shim plate 202, a second permanent magnet 102, and a first shim plate arranged in sequence There is a gap between 201 and the second shim plate 202 to form a working air gap 401. The electromagnetic poles on the left and right sides of the first permanent magnet 101 and the second permanent magnet 102 are opposite, respectively S pole and N pole, and are connected by a magnetic conductor. . Wherein, the first permanent magnet 101 and the second permanent magnet 102 are made of neodymium-iron-boron cuboid structure, figure 1 The direction of the middle arrow is the direction of magnetization; the first shim plate 201 is a rectangular thin plate concavely formed with a notch 301, and ...
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