Emission spectroscopy of a dipolar plasma source in hydrogen under low pressures

International audienceLow-temperature hydrogen plasma has been investigated under the conditions of electron cyclotronresonance by emission spectroscopy. The molecular distribution functions over the low rotational andvibrational levels of the hydrogen molecule in the triplet state have been measured. The translational,rotational, and vibrational temperatures of the ground and excited triplet states of the hydrogen molecule aredetermined. The obtained translational and vibrational temperatures indicate that low-temperature hydrogenplasma under the conditions of electron cyclotron resonance is a more efficient source of vibrationally excitedhydrogen molecules in comparison with the other gas discharges