Measurement of Electron Density and Temperature Using Laser Thomson Scattering in PANTA

Abstract

Electron density (n_e) and electron temperature (T_e) measurements were performed via the plasma assembly for nonlinear turbulence analysis (PANTA) using the laser Thomson scattering technique. The second harmonic of Nd:YAG laser (λ = 532 nm) and an intensified charge-coupled device were used as a light source and a detector, respectively. Plasmas in PANTA were generated with Ar gas in a pressure range of 1 - 5 mTorr. The range of the applied magnetic field was 600 - 1500 G. At the center of the plasma, n_e and T_e ranged (4 - 20) × 10¹⁸ m⁻³ and 0.8 - 3 eV, respectively. Further, n_e monotonically increased and T_e monotonically decreased with the increasing gas pressure and magnetic field.