Printed Circuit Board Based Rotating Coils for Measuring Sextupole Magnets

TL;DR

This paper presents a PCB-based rotating coil design that enables precise measurement of sextupole magnetic fields by suppressing lower order harmonics, improving accuracy in magnetic characterization.

Contribution

It introduces a novel PCB design with integrated harmonic suppression capabilities for more accurate sextupole magnet measurements.

Findings

PCB design effectively suppresses dipole, quadrupole, and sextupole components.

Enhanced sensitivity in measuring higher order harmonic fields.

Demonstrated improved measurement accuracy with recent PCB prototypes.

Abstract

The use of Printed Circuit Boards (PCBs) for the inductive pick-up windings of rotating coil probes has made the construction of these precision magnetic measurement devices much more accessible. This paper discusses the design details for PCBs which on each layer of the board provide for simultaneous analog bucking (suppression) of dipole, quadrupole, and sextupole field components so as to more accurately measure the higher order harmonic fields in sextupole magnets. Techniques to generate designs are discussed, as well as trade-offs to optimize sensitivity. Examples of recent sextupole PCBs and their performance are given.