Generation of 'spiky' potential structures associated with multiharmonic electrostatic ion-cyclotron waves
- Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242 (United States)
The production of coherent, 'spiky' electrostatic potential structures, similar to the spiky electric-field structures that have been observed in the Earth's auroral region, is investigated in a magnetized Q machine plasma. These structures are associated with coherent multiharmonic electrostatic ion-cyclotron (EIC) waves in a current-free plasma having a localized region of ion flow shear (ion flow parallel to B with a gradient in the direction transverse to B). A multiharmonic EIC spectrum is detected in the region of ion flow shear when broadband electrostatic white noise is applied to the plasma column from an antenna. The time series of the potential fluctuations exhibit spiky structures with repetition rates near the ion-cyclotron frequency. Spiky structures can arise from linear combinations of phase-locked multiharmonic EIC waves when the amplitudes of the harmonic components are comparable to that of the fundamental EIC mode.
- OSTI ID:
- 20782461
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 13; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Properties of electrostatic ion-cyclotron waves in a nonuniform magnetic field and their association with strong, magnetized double layers
Ion heating by strong electrostatic ion cyclotron turbulence
A note on electrostatic ion/dust cyclotron instabilities in dusty plasmas
Thesis/Dissertation
·
Tue Dec 31 23:00:00 EST 1985
·
OSTI ID:7127396
Ion heating by strong electrostatic ion cyclotron turbulence
Journal Article
·
Thu Jan 31 23:00:00 EST 1980
· J. Geophys. Res.; (United States)
·
OSTI ID:5460717
A note on electrostatic ion/dust cyclotron instabilities in dusty plasmas
Journal Article
·
Wed Oct 21 00:00:00 EDT 1998
· AIP Conference Proceedings
·
OSTI ID:21202177