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Title: Electron cyclotron resonance (ECR) magnetometry with a plasma reservoir

Abstract

The local magnetic field in a Penning–Malmberg trap is found by measuring the temperatures that result when electron plasmas are illuminated by microwave pulses. Multiple heating resonances are observed as the pulse frequencies are swept. The many resonances are due to electron bounce and plasma rotation sidebands. The heating peak corresponding to the cyclotron frequency resonance is identified to determine the magnetic field. A new method for quickly preparing low density electron plasmas for destructive temperature measurements enables a rapid and automated scan of microwave frequencies. This technique can determine the magnetic field to high precision, obtaining an absolute accuracy better than 1 ppm and a relative precision of 26 ppb. One important application is in situ magnetometry for antihydrogen-based tests of charge-parity-time symmetry and of the weak equivalence principle.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  2. Univ. of Calgary, AB (Canada)
Publication Date:
Research Org.:
University of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF)
OSTI Identifier:
1603473
Alternate Identifier(s):
OSTI ID: 1602581
Grant/Contract Number:  
SC0019346
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 27; Journal Issue: 3; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ECR; Magnetometry

Citation Formats

Hunter, E. D., Christensen, A., Fajans, J., Friesen, T., Kur, E., and Wurtele, J. S. Electron cyclotron resonance (ECR) magnetometry with a plasma reservoir. United States: N. p., 2020. Web. doi:10.1063/1.5141999.
Hunter, E. D., Christensen, A., Fajans, J., Friesen, T., Kur, E., & Wurtele, J. S. Electron cyclotron resonance (ECR) magnetometry with a plasma reservoir. United States. https://doi.org/10.1063/1.5141999
Hunter, E. D., Christensen, A., Fajans, J., Friesen, T., Kur, E., and Wurtele, J. S. Tue . "Electron cyclotron resonance (ECR) magnetometry with a plasma reservoir". United States. https://doi.org/10.1063/1.5141999. https://www.osti.gov/servlets/purl/1603473.
@article{osti_1603473,
title = {Electron cyclotron resonance (ECR) magnetometry with a plasma reservoir},
author = {Hunter, E. D. and Christensen, A. and Fajans, J. and Friesen, T. and Kur, E. and Wurtele, J. S.},
abstractNote = {The local magnetic field in a Penning–Malmberg trap is found by measuring the temperatures that result when electron plasmas are illuminated by microwave pulses. Multiple heating resonances are observed as the pulse frequencies are swept. The many resonances are due to electron bounce and plasma rotation sidebands. The heating peak corresponding to the cyclotron frequency resonance is identified to determine the magnetic field. A new method for quickly preparing low density electron plasmas for destructive temperature measurements enables a rapid and automated scan of microwave frequencies. This technique can determine the magnetic field to high precision, obtaining an absolute accuracy better than 1 ppm and a relative precision of 26 ppb. One important application is in situ magnetometry for antihydrogen-based tests of charge-parity-time symmetry and of the weak equivalence principle.},
doi = {10.1063/1.5141999},
journal = {Physics of Plasmas},
number = 3,
volume = 27,
place = {United States},
year = {Tue Mar 03 00:00:00 EST 2020},
month = {Tue Mar 03 00:00:00 EST 2020}
}

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