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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.
To view the full text, please login as a subscribed user or purchase a subscription. Click here to view the full text on ScienceDirect. Renal cell carcinoma (RCC) accounts for roughly 3% of adult malignancies and 95% of primary kidney neoplasms. Increasing earlier diagnosis of the disease, specifically in the case of small renal masses (SRM) (<4 cm) has been noted, with 74,000 new cases of RCC in the US in 2019.
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