Electron beam characterization via fluorescence imaging of Rydberg states in atomic vapor

• URL: http://arxiv.org/abs/2504.21144v1
• Date: Tue, 29 Apr 2025 19:57:16 GMT
• Title: Electron beam characterization via fluorescence imaging of Rydberg states in atomic vapor
• Authors: Rob Behary, Kevin Su, Nicolas DeStefano, Mykhailo Vorobiov, T. Averett, Alexandre Camsonne, Shukui Zhang, Charlie Fancher, Neel Malvania, Eugeniy Mikhailov, Seth Aubin, Irina Novikova,
• Abstract summary: We demonstrate an all-optical, minimally invasive method for electron beam (e-beam) characterization using Rydberg electrometry.<n>We experimentally demonstrate this technique using a 20 keV e-beam in the range of currents down to 20 $mu$A, and discuss technical challenges produced by environmental electric potentials in the detection chamber.
• Score: 31.174745586845297
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We demonstrate an all-optical, minimally invasive method for electron beam (e-beam) characterization using Rydberg electrometry. The e-beam passes through a dilute Rb vapor prepared in a quantum superposition of ground and Rydberg states that reduces resonant absorption in a narrow spectral region. Imaging the modifications of Rb fluorescence due to shifts in the Rydberg state from the e-beam electric field allows us to reconstruct e-beam width, centroid position, and current. We experimentally demonstrate this technique using a 20 keV e-beam in the range of currents down to 20 $\mu$A, and discuss technical challenges produced by environmental electric potentials in the detection chamber. Overall, we demonstrate the promising potential of such an approach as a minimally invasive diagnostic for charged particle beams.

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