Zobrazeno 1 - 10
of 217
pro vyhledávání: '"Nijdam, S"'
Autor:
Hare, B. M., Scholten, O., Dwyer, J., Ebert, U., Nijdam, S., Bonardi, A., Buitink, S., Corstanje, A., Falcke, H., Huege, T., Hörandel, J. R., Krampah, G. K., Mitra, P., Mulrey, K., Neijzen, B., Nelles, A., Pandya, H., Rachen, J. P., Rossetto, L., Trinh, T. N. G., ter Veen, S., Winchen, T.
Publikováno v:
Phys. Rev. Lett. 124, 105101 (2020)
We use the Low Frequency ARray (LOFAR) to probe the dynamics of the stepping process of negatively-charged plasma channels (negative leaders) in a lightning discharge. We observe that at each step of a leader, multiple pulses of VHF (30~--~80 MHz) ra
Externí odkaz:
http://arxiv.org/abs/2007.03231
Autor:
Elkholy, A., van Veldhuizen, E., Nijdam, S., Ebert, U., van Oijen, J., Dam, N., de Goey, L. Philip H.
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 re
Externí odkaz:
http://arxiv.org/abs/1709.02654
Autor:
Nijdam, S., Takahashi, E.
In previous work we have shown that positive streamers in pure nitrogen can be guided by a laser-induced trail of low electron density. Here we show more detailed results from such measurements. We show the sensitivity of this laser-guiding on pressu
Externí odkaz:
http://arxiv.org/abs/1602.08001
Autor:
Carbone, E. A. D., Hübner, S., van Veldhuizen, E. M., Schrader, A., Nijdam, S., Kroesen, G. M. W.
A coaxial microwave plasma setup was designed for investigation by optical and laser diagnostics. The plasma is sustained by two microwave power sources located at both ends of a coaxial line. This allows generating an axially homogeneous glow discha
Externí odkaz:
http://arxiv.org/abs/1407.8511
Publikováno v:
J. Phys. D: Appl. Phys. 47 (2014) 302001
We measured for the first time the electron density in an Extreme Ultra-Violet induced plasma. This is achieved in a low-pressure argon plasma by using a method called microwave cavity resonance spectroscopy. The measured electron density just after
Externí odkaz:
http://arxiv.org/abs/1403.4826
Streamer discharges are often operated in a repetitively pulsed mode and are therefore influenced by species left over from the previous discharge, especially free electrons and ions. We have investigated these effects by applying two consecutive pos
Externí odkaz:
http://arxiv.org/abs/1310.4307
Publikováno v:
EPL (Europhysics Letters), 103 (2013) 25002
We investigate the branching of positive streamers in air and present the first systematic investigation of splitting into more than two branches. We study discharges in 100 mbar artificial air that is exposed to voltage pulses of 10 kV applied to a
Externí odkaz:
http://arxiv.org/abs/1305.1142
Publikováno v:
2013 J. Phys. D: Appl. Phys. 46 045202
Controlling streamer morphology is important for numerous applications. Up to now, the effect of the voltage rise rate was only studied across a wide range. Here we show that even slight variations in the voltage rise can have significant effects. We
Externí odkaz:
http://arxiv.org/abs/1208.3998
Publikováno v:
J. Phys. D: Appl. Phys. 44 455201 (2011)
Positive streamers need a source of free electrons ahead of them to propagate. A streamer can supply these electrons by itself through photo-ionization, or the electrons can be present due to external background ionization. Here we investigate the ef
Externí odkaz:
http://arxiv.org/abs/1108.1032
Publikováno v:
J. Phys. D: Appl. Phys. 43 (2010) 145204.
Positive streamers are thought to propagate by photo-ionization whose parameters depend on the nitrogen:oxygen ratio. Therefore we study streamers in nitrogen with 20%, 0.2% and 0.01% oxygen and in pure nitrogen, as well as in pure oxygen and argon.
Externí odkaz:
http://arxiv.org/abs/0912.0894