Measurement of vibrational, gas, and rotational temperatures of H{sub 2} (X{sup 1} {sigma}{sub g}{sup +}) in radio frequency inductive discharge plasma by multiplex coherent anti-Stokes Raman scattering spectroscopy technique

Journal Article · Tue Feb 01 00:00:00 EST 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.1829065· OSTI ID:20698353

Shakhatov, V A; De Pascale, O; Capitelli, M; Hassouni, K; Lombardi, G; Gicquel, A ^[1]

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1. Centro Laser srl, SP Per Casamassima, km 3, 70010 Valenzano, Bari (Italy)

Translational, rotational, and vibrational temperatures of H{sub 2} in radio frequency inductive discharge plasmas at pressures and power release ranges, respectively, of 0.5-8 torr and 0.5-2 W/cm{sup 3} have been measured by using multiplex coherent anti-Stokes Raman scattering (CARS) spectroscopy. Computational codes have been developed to determine the rotational and vibrational temperatures and to analyze H{sub 2} CARS spectrum for nonequilibrium conditions. The results show a decrease of the vibrational temperature from 4250 to 2800 K by increasing the pressure from 0.5 to 8 torr and a corresponding increase of the rotational temperature from 525 to 750 K.

• OSTI ID: 20698353
• Journal Information: Physics of Plasmas, Vol. 12, Issue 2; Other Information: DOI: 10.1063/1.1829065; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON TEMPERATURE
HIGH-FREQUENCY DISCHARGES
HYDROGEN
ION TEMPERATURE
PLASMA
PLASMA DIAGNOSTICS
PLASMA PRESSURE
RAMAN SPECTROSCOPY