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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Murphy, S.M. Lee, M.C. Moriarty, D.T. Riddolls, R.J. |
| Copyright Year | 1995 |
| Description | Author affiliation: Plasma Fusion Center, MIT, Cambridge, MA, USA (Murphy, S.M.; Lee, M.C.; Moriarty, D.T.; Riddolls, R.J.) |
| Abstract | Summary form only given, as follows. Our laboratory investigation of electron beam-plasma interactions is motivated by the recent space shuttle experiments. Interesting but puzzling phenomena were observed in the shuttle experiments such as the bulk heating of background ionospheric plasmas by the injected electron beams and the excitation of plasma waves in the frequency range of ELF waves. Our plasma machine, the Versatile Toroidal Facility (VTF) can generate a large magnetized plasma with the electron plasma frequency greater than the electron gyrofrequency by a factor of 3-5 similar to the plasma condition in the ionosphere. Short pulses of electron beams are injected into the VTF plasmas in order to simulate the beam injection from spacecrafts in the ionosphere. A Langmuir probe installed at a bottom port of VTF monitors the spatial variation of electron beams emitted from LaB6 filaments. An energy analyzer has been used to determine the particle energy distribution in the VTF plasmas. Several mechanisms will be tested as potential causes of the bulk heating of background plasmas by the injected electron beams as seen in the space shuttle experiments. It is speculated that the observed ELF emissions result from the excitation of purely growing modes detected by the space shuttle-borne detectors. Results of our laboratory experiments will be reported to corroborate this speculation. |
| File Size | 103070 |
| File Format | |
| ISBN | 0780326695 |
| ISSN | 07309244 |
| DOI | 10.1109/PLASMA.1995.531575 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1995-06-05 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Electron beams Plasma waves Plasma simulation Space shuttles Laboratories Frequency Ground penetrating radar Geophysical measurement techniques Ionosphere Heating |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
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