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- W2939760416 abstract "This report describes the development of the motional Stark Effect diagnostic with laser induced fluorescence (MSE-LIF). The MSE concept relies upon observation of the Balmer-alpha (n=3 to n=2) emission from a neutral hydrogen beam traversing a plasma. As a beam at high velocity, passes through the magnetic field in the plasma, it experiences in its reference frame a Lorentz electric field, $vec{E} =v × vec{B}$. This electric field causes the spectral emission to be split and polarized as described by the Stark effect. The transition is separated into a set of lines in which the line spacing is linearly proportional to the electric field magnitude, and the line polarization is dependent on the electric field direction. Traditionally, MSE has used polarimetry to determine the polarization angle of the light, and related that to the magnetic field pitch angle in the plasma. The MSE diagnostic was developed under high magnetic field (> 1 T) conditions, and the lower fields of recent high-beta experiments such as NSTX posed challenges to the technique. At low magnetic fields Doppler broadening effects mask the Stark effect. With the use of a narrow band laser to pump the Balmer-alpha transition many of the broadening effects are eliminated or mitigated so that MSE measurements at very low magnetic fields can be obtained." @default.
- W2939760416 created "2019-04-25" @default.
- W2939760416 creator A5089913632 @default.
- W2939760416 date "2019-03-08" @default.
- W2939760416 modified "2023-09-27" @default.
- W2939760416 title "Development of the Motional Stark Effect Diagnostic Using Laser-Induced Fluorescence" @default.
- W2939760416 doi "https://doi.org/10.2172/1498539" @default.
- W2939760416 hasPublicationYear "2019" @default.
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