Abstract
It is still a challenge to generate large-volume nonequilibrium plasma at high pressure. In this paper, a large-volume nonequilibrium plasma which has a diameter of 50 cm and a length of 35 cm at 20-kPa N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> induced by electron beam (EB) is reported. The experimental results are consistent with the results simulated by software EGSnrc. The emission spectra reveal that the plasma contains abundant excited N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> * and N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> *. It is similar to the traditional plasma generation techniques such as pulse discharge. The rotational and vibrational temperatures of the plasma next to the EB entrance are about 550 K and 1700 K, respectively. The results of the time evolution experiment show that there are no obvious influences of space charge on the plasma.
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