Estimation of Electron Temperature on Glass Spherical Tokamak (GLAST)

15th Latin American Workshop on Plasma Physics; 21st IAEA TM on Research Using Small Fusion Devices

Hussain, S.^1 ; Sadiq, M.^1 ; Shah, S.I.W.^1

NTFP, P. O. Box 3329, Islamabad, Pakistan^1

关键词: Diagnostic systems;    Insulating vacuum;    Plasma electron temperatures;    Plasma parameter;    Plasma resistance;    Plasma resistivity;    Plasma temperature;    Spherical Tokamak;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/591/1/012009/pdf
DOI  :  10.1088/1742-6596/591/1/012009

来源: IOP

【 摘 要 】

Glass Spherical Tokamak (GLAST) is a small spherical tokamak indigenously developed in Pakistan with an insulating vacuum vessel. A commercially available 2.45 GHz magnetron is used as pre-ionization source for plasma current startup. Different diagnostic systems like Rogowski coils, magnetic probes, flux loops, Langmuir probe, fast imaging and emission spectroscopy are installed on the device. The plasma temperature inside of GLAST, at the time of maxima of plasma current, is estimated by taking into account the Spitzer resistivity calculations with some experimentally determined plasma parameters. The plasma resistance is calculated by using Ohm's law with plasma current and loop voltage as experimentally determined inputs. The plasma resistivity is then determined by using length and area of the plasma column. Finally, the average plasma electron temperature is predicted to be 12.65eV for taking neon (Ne) as a working gas.