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Streamer |
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streamer
1. a stream of light, esp one appearing in some forms of the aurora 2. Computing another word for tape streamer streamer [′strē·mər] (geophysics) A sinuous channel of very high ion-density which propagates itself through a gas by continual establishment of an electron avalanche just ahead of its advancing tip; in lightning discharges, the stepped leader, and return streamer all constitute special types of streamers. Streamer a narrow, luminous channel formed within a gas in an electric field at pressures that are close to and above atmospheric in the stage preceding the electrical breakdown of the gas. Upon formation, a streamer lengthens at great velocity (~106 m/sec), a velocity several times higher than that of the charged particles between the electrodes. This speed is explained by the photo-ionization that occurs in the strong electric field created by the space charge near the advancing tip of the streamer. In their structure, streamers are similar in many respects to leaders in lightning discharges. REFERENCERaether, H. Elektronnye laviny i proboi v gazakh. Moscow, 1968. (Translated from English.)L. A. SENA Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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