Modeling of a Laser-Induced Rydberg Spectroscopy diagnostic for Direct Measurement of the Local Electric Field in the Edge Region of NSTX/NSTX-U

Reymond, L. ; Diallo, A. ; Vekselman, V.
Issue date: 2018
Rights:
Creative Commons Attribution 4.0 International (CC BY)
Cite as:
Reymond, L., Diallo, A., & Vekselman, V. (2018). Modeling of a Laser-Induced Rydberg Spectroscopy diagnostic for Direct Measurement of the Local Electric Field in the Edge Region of NSTX/NSTX-U [Data set]. Princeton Plasma Physics Laboratory, Princeton University. https://doi.org/10.11578/1562088
@electronic{reymond_l_2018,
  author      = {Reymond, L. and
                Diallo, A. and
                Vekselman, V.},
  title       = {{Modeling of a Laser-Induced Rydberg Spec
                troscopy diagnostic for Direct Measureme
                nt of the Local Electric Field in the Ed
                ge Region of NSTX/NSTX-U}},
  publisher   = {{Princeton Plasma Physics Laboratory, Pri
                nceton University}},
  year        = 2018,
  url         = {https://doi.org/10.11578/1562088}
}
Description:

We discuss a novel diagnostic allowing direct measurements of the local electric field in the edge region in NSTX/NSTX-U. This laser based diagnostic's principle consists of depleting the naturally populated $n=3$ level to a Rydberg state --sensitive to electric fields-- that will result in a suppression of part of the $D_{\alpha}$ emission. We refer to this approach as Laser-Induced Rydberg Spectroscopy (LIRyS). It is shown that the local electric field can be measured through the Stark induced resonances observed as dips in the $D_\alpha$ emission. Using forward-modeling of simulated absorption spectra, we show precisions reaching \SI{\pm 2}{\kilo\volt\per\meter} in regions with a local electric field of \SI{15}{\kilo\volt\per\meter}.

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# Filename Filesize
1 readme.txt 9 Bytes
2 ARK_DATA.zip 74.3 KB