Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characteristics of a novel nanosecond DBD microplasma reactor for flow
  applications   We present a novel microplasma flow reactor using a dielectric barrier
discharge (DBD) driven by repetitively nanosecond high-voltage pulses. Our
DBD-based geometry can generate a non-thermal plasma discharge at atmospheric
pressure and below in a regular pattern of micro-channels. This reactor can
work continuously up to about 100 minutes in air, depending on pulse repetition
rate and operating pressure. We here present the geometry and the main
characteristics of the reactor. Pulse energies of 1.9 $\mu$J and 2.7 $\mu$J per
channel at atmospheric pressure and 50 mbar, respectively, have been determined
by time-resolved measurements of current and voltage. Time-resolved optical
emission spectroscopy measurements have been performed to calculate the
relative species concentrations and temperatures (vibrational and rotational)
of the discharge. Effects of the operating pressure and the flow velocity on
the discharge intensity have been investigated. In addition, the effective
reduced electric field strength E/N has been obtained from the intensity ratio
of vibronic emission bands of molecular nitrogen at different operating
pressures. The derived effective E/N increases gradually from 500 Td to 600 Td
when decreasing the pressure from one bar to 0.4 bar. Below 0.4 bar, further
pressure reduction results in a significant increase in the effective E/N up to
about 2000 Td at 50 mbar.

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The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
2
The categories of this paper are: math