Linear analysis of bump on tail instability with non-Maxwellian distribution function
The growth rate of bump on tail instability propagating in unmagnetized plasma has been derived. The dispersion relation has been characterized for (r, q) distribution function with spectral indices r and q which ultimately contributes towards tails and shoulder of distribution function. The growt...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2020
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12493/420 |
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| Summary: | The growth rate of bump on tail instability propagating in unmagnetized plasma has been derived.
The dispersion relation has been characterized for (r, q) distribution function with spectral indices r
and q which ultimately contributes towards tails and shoulder of distribution function. The growth
rate of the bump on tail instability has been estimated numerically for different ratios of temperature
and number density using solar wind data and also by varying values of indices r and q . The higher
value of q play the role towards decreasing the growth rate where the instability has the higher value
when the number density of the superthermal electrons in the bump is higher and the temperature is
low. The maximum growth rate increases with the increase in number density of electrons and
decreases with the increasing temperature in the bump. |
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