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The Optical Penning Gauge (OPG) is a diagnostic tool capable of measuring the partial pressures of neutral gases present in the tokamak vacuum vessel using calibrated spectroscopic observations of the excited gas in the Penning gauge chamber [1]. The intensity of the observed spectral line is related to the pressure of the corresponding gas, having a non-linear dependence over a wide range of pressures.
Abstract In nuclear fusion reactors, plasmas are heated to very high temperatures of more than 100 million kelvin and, in so-called tokamaks, they are confined by magnetic fields in the shape of a torus. Light nuclei, such as deuterium and tritium, undergo a fusion reaction that releases energy, making fusion a promising option for a sustainable and clean energy source.
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