Electron beam characterization via quantum coherent optical magnetometry

doi:10.1063/5.0234219

Electron beam characterization via quantum coherent optical magnetometry

2024-12-23

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Svetlana Malinovskaya

DOI：10.1063/5.0234219

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We present a quantum optics-based detection method for determining the position and current of an electron beam. As electrons pass through a dilute vapor of rubidium atoms, their magnetic field perturbs the atomic spin's quantum state and causes polarization rotation of a laser resonant with an optical transition of the atoms. By measuring the polarization rotation angle across the laser beam, we recreate a 2D projection of the magnetic field and use it to determine the e-beam position, size, and total current. We tested this method for an e-beam with currents ranging from 30 to 110 mu A. Our approach is insensitive to electron kinetic energy, and we confirmed that experimentally between 10 and 20 keV. This technique offers a unique platform for noninvasive characterization of charged particle beams used in accelerators for particle and nuclear physics research.

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Electron beam characterization via quantum coherent optical magnetometry

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