Spectrogram showing the time evolution of soft x-ray emission from plasma in the core of the MegaAmp Spherical Tokamak (MAST) after a discharge; the vertical axis is frequency and the horizontal one is time. Spectrograms such as this are used to study the physics of neoclassical tearing modes, which can limit plasma confinement.
From the article:
Neoclassical Tearing Physics in the Spherical Tokamak MASTR. J. Buttery, O. Sauter, R. Akers, M. Gryaznevich, R. Martin, C. D. Warrick, H. R. Wilson, and the MAST Team
Phys. Rev. Lett. 88, 125005 (2002)
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