Abstract
Temporal evolution of the gas temperature (Tg) in a pulsed microwave surfaguide discharge is studied by measuring the N2 rotational temperature. We found that at high power applied per pulse, gas temperature grows linearly, and saturates after about 150 μs. This effect is absent at low power values, or at short pulse durations. Observed Tg behavior correlates with time-resolved measurements of the N2 vibrational temperature, as well as with N emission lines. Consequently, Tg time behavior was related to N atoms production in plasma. Using obtained Tg growth rates, the effective power used for plasma heating is determined.
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