Poster Session

Poster Session I (4pm-6pm CDT)

4:00 pm – 6:00 pm, Tuesday June 4 // Session D00

Topics:

Profiling Charged Particle Beams Using Atomic Magnetometry

Poster 152

Presenter: Nicolas C DeStefano (William & Mary)

Authors: Irina Novikova (William & Mary), Eugeniy Mikhailov (William & Mary), Seth Aubin (William & Mary), Todd Averett (William & Mary), Shukui Zhang (Thomas Jefferson National Accelerator Facility), Alexandre Camsonne (Jefferson Lab/Jefferson Science Associates), Svetlana Malinovskaya (Stevens Inst of Tech), Aneesh Ramaswamy (Stevens Institute of Tech)

We present the results of 2D profiling of a charged particle beam using coherent atomic magnetometry. Sending a beam of electrons through a low-pressure Rb vapor induces a Zeeman shift in the degenerate ground states of the alkali atoms. A probe laser resonant with the the D₂ transition of ⁸⁵Rb reacts with a rotation in its polarization angle directly proportional to the electron beam's magnetic field. The spatial dependence of the magnetic field can then be captured by imaging the probe laser polarization components. The obtained magnetic field distribution allows us to reconstruct the current density of the particle beam and obtain fundamental beam quantities such as position, width, and total current. We also verify the accuracy of such quantities against several secondary detection schemes such as optical transition radiation. This approach to particle beam profiling is aimed as a non-invasive solution to a wide bandwidth of charged particle beam energies and current densities, and can be extended to obtain 3D profiles.

Funding acknowledgement

This work is supported by U.S. DOE, Jefferson Lab LDRD program, DOE SCGSR, VSGC, and NSF.

POSTERS (157)