Electron cyclotron resonance (ECR) magnetometry with a plasma reservoir

Hunter, E. D.; Christensen, A.; Fajans, J.; Friesen, T.; Kur, E.; Wurtele, J. S.

doi:10.1063/1.5141999

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

Journal Article · 03 March 2020 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5141999 · OSTI ID:1603473

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Univ. of California, Berkeley, CA (United States). Dept. of Physics
Univ. of Calgary, AB (Canada)

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.

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Research Organization:: University of California, Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF)

Grant/Contract Number:: SC0019346

OSTI ID:: 1603473

Alternate ID(s):: OSTI ID: 1602581

Journal Information:: Physics of Plasmas, Vol. 27, Issue 3; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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