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Title: Electron beam characterization via quantum coherent optical magnetometry

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/5.0234219 · OSTI ID:2484270
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [1]
  1. William & Mary, Williamsburg, VA (United States)
  2. Stevens Institute of Technology, Hoboken, NJ (United States)
  3. Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
+ Show Author Affiliations

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 μA. Our approach is insensitive to electron kinetic energy, and we confirmed that experimentally between 10 and 20 keV. In conclusion, this technique offers a unique platform for noninvasive characterization of charged particle beams used in accelerators for particle and nuclear physics research.

Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
2484270
Report Number(s):
DOE/OR/23177--7758; JLAB-ACC--24-4252; arXiv:2412.02686
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 125; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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journal September 2018
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Giant magneto-optical rotation effect in rubidium vapor measured with a low-cost detection system journal September 2021

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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