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Performance verification of a precise vibrating-wire magnet alignment technique for next-generation light sources.

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Summary

High-accuracy magnet alignment is crucial for next-generation light sources. This study refines vibrating-wire techniques, achieving micrometer-level precision by carefully selecting wires and accounting for systematic errors in magnet alignment.

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Area of Science:

  • Physics
  • Accelerator Science
  • Engineering

Background:

  • High-accuracy magnet alignment (10 µm or better) is essential for next-generation light-source rings to ensure adequate dynamic apertures.
  • Conventional vibrating-wire alignment methods rely on theoretical catenary curves to determine wire sag, potentially introducing errors.

Purpose of the Study:

  • To improve the accuracy of magnet alignment techniques for particle accelerators.
  • To investigate and mitigate systematic errors in vibrating-wire alignment, including thermal drift and reassembly effects.

Main Methods:

  • Experimental measurement of wire sag profiles in the longitudinal direction to micrometer-order accuracy.
  • Development and utilization of a test bench for a vibrating-wire alignment system applied to multipole magnets.
  • Investigation of systematic error factors such as thermal deformation and reassembly-induced changes in magnetic centers.

Main Results:

  • Selection of suitable wires significantly reduces deviations between actual and theoretical wire sag.
  • Achieved micrometer-order standard deviation for total error in magnetic center measurements.
  • Quantified the impact of thermal drift and reassembly on magnetic center alignment.

Conclusions:

  • Optimized vibrating-wire alignment techniques can achieve micrometer-level precision for magnet positioning in accelerators.
  • Understanding and accounting for systematic errors are critical for practical, high-accuracy magnet alignment in real-world applications.
  • The refined method provides a robust solution for the precise alignment requirements of future light-source rings.