Zezhou WU, Jidong ZHANG, Jinya CHEN, Qiaogen ZHOU. Positional calibration of Hall probes for magnetic field measurement of a superconducting undulator in SHINE[J]. NUCLEAR TECHNIQUES, 2023, 46(9): 090201
- NUCLEAR TECHNIQUES
- Vol. 46, Issue 9, 090201 (2023)
Fig. 1. Diagram of sensor layout for the magnetic field measurement sledge
Fig. 2. Principle schematic of the laser 3D-positioning of the magnetic field measurement sledge
Fig. 3. Relationship between the retro-reflector and laser spot on the CCD in the horizontal direction
Fig. 4. Schematic diagram of flipping calibration principle for Hall probes position
Fig. 5. 3D diagram of iron wedge-shaped block adsorbed by a permanent magnet block
Fig. 6. Photograph of the magnetic field measurement sledge mounted on a 3D high-precision mechanical arm(a) Horizontally-placed sledge, (b) Vertically-placed sledge
Fig. 7. Magnetic field distribution measured by the three Hall probes(a) Horizontally-placed, (b) Vertically-placed, (c) Horizontally-placed with a flipped magnetic measuring sledge, (d) Vertically-placed with a flipped magnetic measuring sledge
Fig. 8. Diagram of retro-reflector position calibration apparatus
Fig. 9. Linear curve of the sledge displacement before (a) and after (b) sledge flipping and the coordinates of the centroid position
Fig. 10. Influence of the sledge manufacturing error on Hall probe calibration result (a) Horizontally-placed sledge, (b) Vertically-placed, (b) Flipped horizontally-placed magnetic measuring sledge, (d) Flipped vertically-placed magnetic measuring sled
Fig. 11. Influence of the discrepancy between the motion platform and magnetic field coordinate axes on the Hall probe calibration
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Table 1. Peak and zero positions of the magnetic field distribution measured by the Hall probes on a horizontally-placed sledge
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Table 2. Peak and zero positions of the magnetic field distribution measured by the Hall probes on a vertically-placed sledge
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Table 3. Position of the Hall probes' center of rotation and offset distance
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