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Examining the effect of the magnetic field in Ba+ ions

Dorp, F.P.J. van (2016) Examining the effect of the magnetic field in Ba+ ions. Bachelor's Thesis, Physics.

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At the Van Swinderen Institute in Groningen, the Netherlands, an experiment is underway to measure the Weinberg angle sin θw which is a key parameter in the Standard Model. For this the light shift of energy levels in a Ba+ ion will be determined to extract the value of sin θw exploiting Atomic Parity Violation. The ion is confined in a Paul trap. To determine light shift accurate knowledge of the magnetic field strength and the magnetic field direction is required. Therefore, a relation between the currents in a set of three square Helmholtz-like coil pairs around the trapped Ba+ ion and the magnetic field induced in the x-, y- and z-direction was obtained with 1% uncertainty. The magnetic field inside the trap was calibrated by measurements at two locations outside the trap and by measurements with an ion inside the trap. Further research is required to determine this accurately. The ratio between the current on the x-coils and y-coils for a magnetic field perpendicular to the laser beams driving the 6s2S1/2-6p2P1/2 and 5d2D3/2 - 6p2P1/2 transitions in the ion is obtained with an uncertainty of 4 %.

Item Type: Thesis (Bachelor's Thesis)
Degree programme: Physics
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 08:23
Last Modified: 15 Feb 2018 08:23

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