Observation of collective modes of ultracold plasmas

Applying a radio-frequency electric field to an expanding ultracold neutral plasma leads to the observation of as many as six peaks in the emission of electrons from the plasma. These are identified as collective modes of the plasma and are in qualitative agreement with a model of Tonks-Dattner reso...

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Veröffentlicht in:	Physical review letters 2006-03, Vol.96 (10), p.105003-105003, Article 105003
Hauptverfasser:	Fletcher, R S, Zhang, X L, Rolston, S L
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY ELECTRIC FIELDS ELECTRON EMISSION ELECTRON TEMPERATURE ELECTRONS INHOMOGENEOUS PLASMA ION TEMPERATURE PLASMA DIAGNOSTICS PLASMA INSTABILITY PLASMA WAVES RADIOWAVE RADIATION SOUND WAVES TIME DEPENDENCE
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Zusammenfassung:	Applying a radio-frequency electric field to an expanding ultracold neutral plasma leads to the observation of as many as six peaks in the emission of electrons from the plasma. These are identified as collective modes of the plasma and are in qualitative agreement with a model of Tonks-Dattner resonances, electron sound waves propagating in a finite-sized, inhomogeneous plasma. Such modes may provide an accurate method to determine the time-dependent electron temperature.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.96.105003