# Beam-based mapping of pulsed septum stray field at VEPP-2000 collider

## TL;DR

This paper introduces a beam-based field mapping technique to measure the stray magnetic field of a pulsed septum magnet at VEPP-2000, enabling in situ field mapping through beam orbit response analysis.

## Contribution

The paper presents a novel in situ beam-based method for mapping pulsed septum stray fields using beam orbit responses at VEPP-2000.

## Key findings

- Successful measurement of the septum's stray field in situ
- Ability to map localized magnetic perturbations across the machine
- Method applicable for accurate magnetic element alignment

## Abstract

Various beam-based methods are widely used for machine study and accurate tuning. Beam closed orbit (CO) responses are routinely used worldwide for magnetic elements alignment and lattice correction. The paper presents the beam-based field mapping technique, applied for measurement of pulsed septum magnet stray field at VEPP-2000 electron-positron collider. Relatively slow pulse of weak leakage field disturbs the CO allowing detecting field longitudinal integral. While scanning with transverse coordinate in wide range one can measure the field map of the localized perturbation at machine in situ.

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Source: https://tomesphere.com/paper/1901.00702