IPAC'25 - the 16th International Particle Accelerator Conferece

Development of non-invasive beam diagnostics by quantum optics-based detection

Not scheduled

20m

Hall 101 (TICC)

Contributed Oral Presentation MC6.T03 Beam Diagnostics and Instrumentation THBD:Beam Instrumentation and Controls, Feedback and Operational Aspects (Contributed)

Speaker

Shukui Zhang (Thomas Jefferson National Accelerator Facility)

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.