**4. Conclusion**

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discharges dynamics and background gas dynamics. The experimental devices have to be very sensitive and precise in order to capture the main characteristics of nanosecond phenomena located in very thin filaments of micro scale extension. However, the recent evolution of experimental devices (ICCD or streak camera, DC and pulsed high voltage supply, among others) allow to better understand the physics of the micro-discharge. Furthermore, recent simulation of the micro-discharges involving the discharge and postdischarge phase in multidimensional dimension was found to give precise information about the chemical and hydrodynamics activation of the background gas in an atmospheric non-thermal plasma reactor. These kinds of simulation results, coupled with experimental investigation, can be used in future works for the development of new design of plasma reactor very well adapted to the studied application either in the environmental field or biomedical one.
