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K: Fachverband Kurzzeitphysik
K 11: Poster
K 11.2: Poster
Dienstag, 31. März 2009, 17:30–19:30, Foyer des IfP
Magnetically delayed pseudospark switch — •Byung-Joon Lee1, Marcus Iberler1, Joachim Jacoby1, Isfried Petzenhauser2, Udo Blell2, and Klaus Frank3 — 1Institut für angewandte Physik, Goethe Universität, Frankfurt — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — 3TexasTech University, Lubbock, USA
Saturable inducting cores have been series integrated to pseudospark switch (PSS) in order to improve lifetime of the switch by reducing commutation losses of a low pressure gas discharge switch. One of primarily problems in low pressure gas discharge switches is shortage of the lifetime due to commutation losses resulting is anode heating, gas rarefaction and gas clean up effect. This drawback can be minimized by means of carefully dimensioned saturable inductors. After a gas switch is closed, since the impedance of the inducting cores is large, most of voltage appears across them until they become saturated. As cores become saturated, their impedance decreases drastically. As a result, the current flow is delayed minimizing switching losses in a gas switch. Traditionally, this method is well used for thyratrons which has hot cathode. On the other hand, PSS is based on the cold cathode electrode in which it is difficult to apply such delaying system since initially certain values of the current are necessary to begin and develop the PSS discharge. In this experiment, we will verify the effect of the saturable inducting cores in combination with PSS for the first time.