INVESTIGATIONS ABOUT THE INFLUENCE OF THE EXTERNAL CIRCUIT ELEMENTS ON THE PROPAGATION OF IONIZATION WAVES IN THE POSITIVE-COLUMN OF A NEONGLOW-DISCHARGE
Kd. Weltmann et al., INVESTIGATIONS ABOUT THE INFLUENCE OF THE EXTERNAL CIRCUIT ELEMENTS ON THE PROPAGATION OF IONIZATION WAVES IN THE POSITIVE-COLUMN OF A NEONGLOW-DISCHARGE, Contributions to Plasma Physics, 35(3), 1995, pp. 225-239
Our investigations have been motivated by former works of MICHEL and A
CHTERBERG [1]. They described the important influence of the external
circuit elements and connected therewith the mechanism of feedback (BA
RKHAUSEN k . v greater than or equal to 1). The properties of external
and self-excited moving striations (threshold current, fundamental fr
equency) are strongly influenced by the feedback. This paper demonstra
tes the differences occuring either a voltage or a current source in t
he external circuit is used in order to perturb the discharge and to r
ealize different degrees of feedback by changing the external resistor
R(ext) of the discharge. It is shown the impact on the fields of exis
tence of self excited striations in a non driven discharge. Furthermor
e our investigations yield differences in the width of ARNOL'D tongues
[2] of periods one and two in the perturbed discharge depending on a
varied degree of feedback. Last not least its influence on the behavio
ur of quasiperiodic and chaotic states is demonstrated. The investigat
ions permit first information concerning the sensivitity of one parame
ter variation (feedback controll by external resistor) which might be
used e.g. for a stabilization of unstable periodic orbits (controlling
chaos).