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|Title:||Thermodynamics of near earth plasma sheet and specific entropy parameter during substorm — A case study|
|Authors:||Prince, P R|
|Keywords:||Near earth plasma sheet;Substorm;Specific entropy|
|Abstract:||Heat transactions in the near earth plasma sheet at ISEE-2 site during the full course of a single substorm is analysed. The selected substorm was shown to exhibit an adiabatic growth phase with non-adiabatic expansion and recovery phases. During growth phase, the sheet acts as a mere passage for the flow of energy from solar wind into the earth's atmosphere, supporting the driven model of substorms. The substorm analysed, in general, was a non-adiabatic e vent. The polytropic index η has proved to be unsuccessful in predicting the thermodynamic state of plasma sheet during substorm. Specific entropy parameter is suggested as a better tool for such predictions.|
|ISSN:||0975-105X (Online); 0367-8393 (Print)|
|Appears in Collections:||IJRSP Vol.33(5) [October 2004]|
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