Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasma
In this paper, we investigate the impact of an external magnetic field on the Weibel instability driven by temperature anisotropy in a magnetized plasma. The study provides the influence of electron temperature anisotropy, considering both cold as well as warm ions. We derive expressions for the gro...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0189656 |
| _version_ | 1827330116381835264 |
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| author | Twinkle Pahuja Amit Kumar Himank Sagar Ruby Gupta Jyotsna Sharma |
| author_facet | Twinkle Pahuja Amit Kumar Himank Sagar Ruby Gupta Jyotsna Sharma |
| author_sort | Twinkle Pahuja |
| collection | DOAJ |
| description | In this paper, we investigate the impact of an external magnetic field on the Weibel instability driven by temperature anisotropy in a magnetized plasma. The study provides the influence of electron temperature anisotropy, considering both cold as well as warm ions. We derive expressions for the growth rate Γ (s−1) in each case to quantify the effect of some specific parameters on the instability. For example, the growth rate is plotted against the magnetic field for three distinct cases: considering only electrons, including cold ions, and incorporating warm ions. It is observed that the growth rate decreases as the applied magnetic field increases. Furthermore, the addition of both cold and warm ions to the plasma significantly influences the observed effects. It can be explained as follows: in the presence of cold ions, the growth rate is decreased with an increase in the wave number kz (cm−1). In addition, a decrease in the growth rate is observed with an increasing wave number in the case of warm ions. Therefore, it can be seen that the Weibel instability, propelled by thermal anisotropy, holds significant implications owing to its prevalence in both astrophysical and laboratory plasmas. The findings presented here are expected to contribute to the advancements in magnetic field generation and particle acceleration in various astrophysical phenomena, including gamma-ray bursts, relativistic collisionless shock fronts, radio supernovae, and pulsar winds. |
| first_indexed | 2024-03-07T16:00:46Z |
| format | Article |
| id | doaj.art-289469c96fbb4a2ba74b1ca7834c2fc8 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-07T16:00:46Z |
| publishDate | 2024-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-289469c96fbb4a2ba74b1ca7834c2fc82024-03-04T21:29:33ZengAIP Publishing LLCAIP Advances2158-32262024-02-01142025136025136-810.1063/5.0189656Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasmaTwinkle Pahuja0Amit Kumar1Himank Sagar2Ruby Gupta3Jyotsna Sharma4Department of Physics, Amity School of Applied Sciences, Amity University Haryana, Manesar, Gurugram 122051, IndiaDepartment of Physics, Modern Institute of Technology and Research Centre, Alwar, Rajasthan 301028, IndiaDepartment of Applied Physics, Delhi Technological University, Shahbad Daulatpur, Bawana Road, Delhi 110042, IndiaDepartment of Physics, Swami Shraddhanand College, University of Delhi, Alipur, Delhi 110036, IndiaDepartment of Physics, Amity School of Applied Sciences, Amity University Haryana, Manesar, Gurugram 122051, IndiaIn this paper, we investigate the impact of an external magnetic field on the Weibel instability driven by temperature anisotropy in a magnetized plasma. The study provides the influence of electron temperature anisotropy, considering both cold as well as warm ions. We derive expressions for the growth rate Γ (s−1) in each case to quantify the effect of some specific parameters on the instability. For example, the growth rate is plotted against the magnetic field for three distinct cases: considering only electrons, including cold ions, and incorporating warm ions. It is observed that the growth rate decreases as the applied magnetic field increases. Furthermore, the addition of both cold and warm ions to the plasma significantly influences the observed effects. It can be explained as follows: in the presence of cold ions, the growth rate is decreased with an increase in the wave number kz (cm−1). In addition, a decrease in the growth rate is observed with an increasing wave number in the case of warm ions. Therefore, it can be seen that the Weibel instability, propelled by thermal anisotropy, holds significant implications owing to its prevalence in both astrophysical and laboratory plasmas. The findings presented here are expected to contribute to the advancements in magnetic field generation and particle acceleration in various astrophysical phenomena, including gamma-ray bursts, relativistic collisionless shock fronts, radio supernovae, and pulsar winds.http://dx.doi.org/10.1063/5.0189656 |
| spellingShingle | Twinkle Pahuja Amit Kumar Himank Sagar Ruby Gupta Jyotsna Sharma Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasma AIP Advances |
| title | Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasma |
| title_full | Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasma |
| title_fullStr | Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasma |
| title_full_unstemmed | Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasma |
| title_short | Impact of external magnetic field on temperature anisotropy driven Weibel instability in a magnetized plasma |
| title_sort | impact of external magnetic field on temperature anisotropy driven weibel instability in a magnetized plasma |
| url | http://dx.doi.org/10.1063/5.0189656 |
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