Abstract
There is an increasing need to shield beams and accelerator elements from stray magnetic fields. The application of magnetic shielding in linear colliders is discussed. The shielding performance of soft iron and mu-metal is measured for magnetic fields of varying amplitude and frequency. Special attention is given to characterise the shielding performance for very small-amplitude magnetic fields.
Highlights
Measurements of sub-nT dynamic magnetic field shielding with soft iron and mu-metal for use in linear colliders
The shielding performance of soft iron and mu-metal is measured for magnetic fields of varying amplitude and frequency
Stray magnetic fields lead to emittance growth and a beam-beam offset at collision, which reduces luminosity
Summary
Measurements of sub-nT dynamic magnetic field shielding with soft iron and mu-metal for use in linear colliders. - Measurements and modeling of stray magnetic fields and the simulation of their impact on the Compact Linear Collider at 380 GeV C. The shielding performance of soft iron and mu-metal is measured for magnetic fields of varying amplitude and frequency. To achieve a large luminosity extremely small vertical beam sizes are targeted. These beam sizes can only be realised with ultra-low emittance beams. A more comprehensive description of the impact of stray magnetic fields can be found in [2]
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