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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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2020
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| Online Access: | http://hdl.handle.net/20.500.12493/420 |
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| author | Noreen, N Shiekh, A Habumugisha, I Zaheer, S AShah, H |
| author_facet | Noreen, N Shiekh, A Habumugisha, I Zaheer, S AShah, H |
| author_sort | Noreen, N |
| collection | KAB-DR |
| description | 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. |
| format | Article |
| id | oai:idr.kab.ac.ug:20.500.12493-420 |
| institution | KAB-DR |
| language | en_US |
| publishDate | 2020 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oai:idr.kab.ac.ug:20.500.12493-4202024-01-17T04:44:03Z Linear analysis of bump on tail instability with non-Maxwellian distribution function Noreen, N Shiekh, A Habumugisha, I Zaheer, S AShah, H solar wind, Instability, Growth rate 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. Kabale University 2020-06-19T09:19:54Z 2020-06-19T09:19:54Z 2020 Article N Noreen et al 2020 Plasma Res. Express 2 025006 http://hdl.handle.net/20.500.12493/420 en_US application/pdf IOP Publishing |
| spellingShingle | solar wind, Instability, Growth rate Noreen, N Shiekh, A Habumugisha, I Zaheer, S AShah, H Linear analysis of bump on tail instability with non-Maxwellian distribution function |
| title | Linear analysis of bump on tail instability with non-Maxwellian distribution function |
| title_full | Linear analysis of bump on tail instability with non-Maxwellian distribution function |
| title_fullStr | Linear analysis of bump on tail instability with non-Maxwellian distribution function |
| title_full_unstemmed | Linear analysis of bump on tail instability with non-Maxwellian distribution function |
| title_short | Linear analysis of bump on tail instability with non-Maxwellian distribution function |
| title_sort | linear analysis of bump on tail instability with non maxwellian distribution function |
| topic | solar wind, Instability, Growth rate |
| url | http://hdl.handle.net/20.500.12493/420 |
| work_keys_str_mv | AT noreenn linearanalysisofbumpontailinstabilitywithnonmaxwelliandistributionfunction AT shiekha linearanalysisofbumpontailinstabilitywithnonmaxwelliandistributionfunction AT habumugishai linearanalysisofbumpontailinstabilitywithnonmaxwelliandistributionfunction AT zaheers linearanalysisofbumpontailinstabilitywithnonmaxwelliandistributionfunction AT ashahh linearanalysisofbumpontailinstabilitywithnonmaxwelliandistributionfunction |