Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.30: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1+2
The moiré fieldmeter: an atom optics tool for electric and magnetic field measurements — •Andrea Demetrio1, Pierre Lansonneur2, Simon Müller1, Patrick Nedelec2, and Markus K. Oberthaler1 — 1Kirchhoff-Institut für Physik, Im Neuenheimer Feld 227, 69120 Heidelberg (DE) — 2Institut de Physique Nucleaire de Lyon, Bâtiment Paul Dirac, 4 rue E. Fermi, 69622 Villeurbanne (FR)
We report on the development of a fieldmeter which employs the moiré effect to determine the magnitude of electric and magnetic fields in the experimental region.
The device is composed by three material gratings with micrometric periodicity. A diffused beam of particles going through the gratings forms a pattern with the same periodicity as the gratings themselves. A force acting on the particles causes a shift of this pattern, which is proportional to the acceleration perpendicular to the orientation of the slits. Comparing this shift for different ions, the intensity of the external fields can be measured. With the use of three ion species with different charge-to-mass ratios, it is possible to decouple the effects of magnetic and electric fields.
Here we show the use of this device in the scope of the ATLIX project (Antiproton Talbot-Lau Interferometry eXperiment) as a way to ensure that the fields inside the experimental region are below the critical limits which would hinder its realization. The data have been taken with the use of a ECR ion source in Heidelberg, where a prototype of the experiment is currently being built.