Dependence of the emission intensities with the flow in pulsed N2 dc discharges

LUCIO ISOLA; GOMEZ, B J; FEUGEAS, J N; V. GUERRA

Virginia

Congreso; 60th Gaseous Electronics Conference.; 2007

The American Physical Society

GEC07-2007-000167Abstract Submitted for the GEC07 Meeting of The American Physical SocietySorting Category: 2.1 (E)Dependence of the emission intensities with the flow in pulsed N2 dc discharges LUCIO ISOLA, BERNARDO J A GOMEZ, JORGE N FEUGEAS, Instituto de Fsica Rosario (CONICET-UNR),Bv. 27 de Febrero 210 Bis., S2000EZP Rosario, Argentina., VASCOGUERRA, Centro de Fisica dos Plasmas Instituto Superior Tecnico1049-001 Lisboa Portugal +351-21.841.93.22 ? This work presents an experimental investigation of the behavior of the emission bands of the first negative and second positive systems of nitrogen in the negativeglow of a pulsed dc discharge. The discharge current, applied voltageand gas temperature were measured as well. The experiments were carriedout at a fixed cathode temperature equal to 705 oK, the pressurewas varied between 2.6 and 3.4 Torr, whereas the gas flow was in therange 30-100 ml/min. At constant pressure, the emission intensities passthrough a minimum as the gas flow increases. On the other hand, atfixed gas flow all the emissions decrease as the pressure increases. Itis shown that the increase in the flow contributes to a departure fromquasi- neutrality conditions in the negative glow. Moreover, a decreasein the ionization degree with pressure is observed, as expected.Prefer Oral SessionX Prefer Poster SessionBernardo Jose A Gomezbgomez@ifir.edu.arInstituto de Fisica RosarioDate submitted: 15 Jun 2007 Electronic form version 1.4