Noninvasive 3D Field Mapping of Complex Static Electric Fields

Kainz, Andreas, Keplinger, Franz, Hortschitz, Wilfried, Kahr, Matthias, Steiner, Harald, Stifter, Michael, Hunt, James R, Resta-Lopez, Javier, Rodin, Volodymyr, Welsch, Carsten P ORCID: 0000-0001-7085-0973
et al (show 3 more authors) (2019) Noninvasive 3D Field Mapping of Complex Static Electric Fields. PHYSICAL REVIEW LETTERS, 122 (24).

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Many upcoming experiments in antimatter research require low-energy antiproton beams. With a kinetic energy in the order of 100 keV, the standard magnetic components to control and focus the beams become less effective. Therefore, electrostatic components are being developed and installed in transfer lines and storage rings. However, there is no equipment available to precisely map and check the electric field generated by these elements. Instead, one has to trust in simulations and, therefore, depend on tight fabrication tolerances. Here we present, for the first time, a noninvasive way to experimentally probe the electrostatic field in a 3D volume with a microsensor. Using the example of an electrostatic quadrupole focusing component, we find excellent agreement between a simulated and real field. Furthermore, it is shown that the spatial resolution of the probe is limited by the electric field curvature which is almost zero for the quadrupole. With a sensor resolution of 61V/m/√Hz, the field deviation due to a noncompliance with the tolerances can be resolved. We anticipate that this compact and practical field strength probe will be relevant also for other scientific and technological disciplines such as atmospheric electricity or safeguarding near power infrastructure.

Item Type: Article
Uncontrolled Keywords: Classical mechanics, Electrostatic interactions, Metrology, Electrostatic accelerators, Perturbation theory, Precision measurements
Depositing User: Symplectic Admin
Date Deposited: 15 Aug 2019 08:41
Last Modified: 07 Oct 2021 01:11
DOI: 10.1103/PhysRevLett.122.244801
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