Speaker
Description
We report our latest progress developing diagnostics using quantum optics-based detection method for determining the spatial properties and current of electron beams. As electrons pass through a dilute vapor of rubidium atoms, their electric and magnetic field perturb quantum states of Rb atoms and change their optical properties. By measuring the polarization rotation due to electron current, we can recreate a 2D projection of the electrons’ magnetic field and determine the electron beam position, size and total current. Our experiment using a 10 ~ 20 keV/110 uA electron beam shows this approach is insensitive to electron energy.
Alternatively, using quantum superpositions including highly excited Rydberg states of Rb atoms, we can also measure electric field generated by a travelling electron beam. We reconstructed a 2D profile of a 20 keV/150 uA electron beam and measured its current.
These complimentary methods can be particularly useful for real time non-invasive spatial and current characterization of high energy and high current charged particle beams used in various particle accelerators and nuclear physics research.
Funding Agency
This work is supported by U.S. DOE Contract No. DEAC05-06OR23177, NSF award 2326736 and Jefferson Lab LDRD program.
Region represented | America |
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Paper preparation format | LaTeX |