Association of Alfvén waves and proton cyclotron waves with electrostatic bipolar pulses: magnetic hole events observed by Polar
| dc.contributor.author | Lakhina, G.S. | |
| dc.contributor.author | Tsurutani, B.T. | |
| dc.contributor.author | Pickettd, J. | |
| dc.date.accessioned | 2015-08-25T07:29:58Z | |
| dc.date.accessioned | 2021-02-12T09:27:34Z | |
| dc.date.available | 2015-08-25T07:29:58Z | |
| dc.date.available | 2021-02-12T09:27:34Z | |
| dc.date.issued | 2004 | |
| dc.description.abstract | Two magnetic hole events observed by Polar on 20 May 1996 when it was in the polar cap/polar cusp boundary layer are studied. Low-frequency waves, consisting of nonlinear Alfvén waves and large amplitude (±14nT peak-to-peak) obliquely propagating proton cyclotron waves (with frequency f~0.6 to 0.7 fcp), accompanied by electric bipolar pulses (electron holes) and electron heating have been observed located within magnetic holes. It is shown that low-frequency waves can provide free energy to drive some high frequency instabilities which saturate by trapping electrons, thus, leading to the generation of electron holes. | en_US |
| dc.identifier.accession | 090766 | |
| dc.identifier.citation | Nonlinear Processes in Geophysics, v.11, p.205-213, 2004, doi: 10.5194/npg-11-205-2004 | en_US |
| dc.identifier.uri | http://library.iigm.res.in:4000/handle/123456789/277 | |
| dc.language.iso | en | en_US |
| dc.subject | Magnetic holes | en_US |
| dc.subject | Alfvén waves | en_US |
| dc.subject | Proton cyclotron waves | en_US |
| dc.title | Association of Alfvén waves and proton cyclotron waves with electrostatic bipolar pulses: magnetic hole events observed by Polar | en_US |
| dc.type | Article | en_US |