Abstract

CEPEDA GRIMALDOS, J. F; SARMIENTO SANTOS, A  and  SUPELANO GARCIA, I. Low Pressure Glow Discharge I vs. V Behavior Study, in a DC and Pulsed DC in a Calorimeter Type Reactor. Ciencia en Desarrollo [online]. 2014, vol.5, n.1, pp.7-13. ISSN 0121-7488.

When a glow discharge is generated with a DC, or pulsating a DC power at diverse atmospheres, it can be characterized by its color or by I vs. V curve behavior. For various atmospheres it can be presented the different glow discharge types, such as: a subnormal glow discharge, a normal glow discharge and an abnormal glow discharge. In this paper, these glow discharge types are generated, in a concentric cylindrical reactor, in which its internal cylinder works as the cathode and the external cylinder as the anode. Between the electrodes, it was generated a low pressure glow discharge, through various gaseous atmospheres (air, argon and hydrogen). Such discharges were studied at various pressures values between 1 torr and 6 torr and at various currents values, between 200 mA and 500 mA, with a 50 mA increment for each current variation. For this, two current types were utilized: DC and pulsating DC. The discharge characteristics were analyzed by its I vs. V curves.

Keywords : I vs. V Curves; Subnormal Glow Discharge; Normal Glow Discharge; Abnormal Glow Discharge.

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