Sideband Dispersion

Starke, T. P.; Malmberg, J. H.

doi:10.1103/physrevlett.37.505

Cited by 21 publications

(3 citation statements)

References 17 publications

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“…There is similar evidence (Whitaker et a1 1976) for the existence of the i=x(3*45), assigned to yc in (7.1) and the transitions $'-+fy, g+$y, with a branching ratio product given by: B R ( $ + ~)…”

Section: Comparison With Experimentsmentioning

confidence: 59%

Magnetic dipole transitions in atomic and particle physics: ions and psions

Sucher¹

1978

Rep. Prog. Phys.

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Magnetic dipole (Ml) transitions in atomic systems can be classified into two types. If in a non-relativistic description of the atomic states the spatial parts of the initial and final wavefunctions are the same, as in the hydrogenic transition 22P312-+ PPpl/~+y, one has an 'ordinary' or 'unhindered' transition. If the spatial parts are Joseph Sucher interaction between the quark and the antiquark is illustrated. A brief survey is given of recent attempts to overcome the deficiencies of the model. The review concludes with a discussion of other problems of current interest in which relativistic M1 transitions may play an important role. This review was received in March 1978. Magnetic dipole transitions in atomic and particle physics: ions and psions 1783 Contents 1. Introduction. 2. Theory of M1 transitions in H and H-like ions , 2.1. Non-relativistic theory. 2.2. Relativistic theory. 2.3. How do metastable S states decay? A brief history 3.1. Experimental developments in the 1970s 3.2. Theory of the 23S1-+ 11So+y decay. 3.3. Comparison of theory with experiment. 4.1. The discovery of the psions. 4.2. T h e three c's: charm, colour and confinement 4.3. Width of (E , c) bound states and the 021 rule 5.1. Description of the model 5.2. Qualitative predictions and comparison with experiment. 5.3. Quantitative aspects of the extreme non-relativistic model 6. Radiative transitions of two-body bound states of spin-& particles 6.1. Relativistic wave equation. 6.2. Transformation to Pauli-type wavefunctions , 6.3. Effective potential. 6.4. Theory of radiative decay 6.5. Partial summary and cases of special interest , 6.6. Decay rate formulae. 7. Application to the narrow resonances. 7.1. Computation of M1 decay rates , 7.2. Comparison with experiment. 7.3. Survey of present status 8. Concluding remarks .

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Section: Comparison With Experimentsmentioning

confidence: 59%

Magnetic dipole transitions in atomic and particle physics: ions and psions

Sucher¹

1978

Rep. Prog. Phys.

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“…In fact, the amplitude oscillation of Langmuir waves which causes sideband instability and makes the electron temperature higher is sometimes detected by a ring electrode [19,20].…”

Section: Nonlinear Decay Instabilitymentioning

confidence: 99%

The decay instability of Langmuir waves in the non-neutral electron plasma column

Higaki

1997

Plasma Phys. Control. Fusion

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The behaviour of large amplitude Langmuir waves is experimentally observed in a non-neutral electron plasma column with a cylindrical boundary. It is found that a Langmuir wave whose amplitude is above a threshold decays into lower frequency Langmuir waves. Since the dispersion relation is different from that of the unbounded neutral plasma, which is theoretically considered, the three-wave decay process of Langmuir waves becomes possible. In these processes, sidebands due to a large amplitude Langmuir wave satisfy the energy and momentum conservation relation. The threshold of this decay instability depends on the plasma temperature and becomes lower as the temperature becomes higher.

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“…The instability first observed by Wharton et a1 (1968), and variously referred to as the sideband or trapped-particle instability, is now regarded as having as its dominant feature the generation of a beam of untrapped electrons accelerated by a transfer of energy from a large-amplitude electron plasma wave to the particles. It is thus essentially a non-linearly-induced linear beam-plasma instability (Starke andMalmberg 1976, Franklin 1976).…”

Section: Particle Trappingmentioning

confidence: 99%

Microinstabilities in plasmas-non-linear effects

Franklin

1977

Rep. Prog. Phys.

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This review attempts to bring together and present in as coherent a manner as possible the wide range of non-linear kinetic phenomena which occur in a plasma. The extent to which the theory has been borne out by experiment is indicated in detail and in several instances it is convenient to catalogue the results.While the main thrust of laboratory plasma physics has been associated with magnetic containment fusion, there has been the recent emergence of laser heating as an alternative path to fusion, and the refinement of measurements in the ionosphere and magnetosphere means that there has been a parallel development of interest in non-linear processes. For this reason this review attempts to cover fundamental aspects rather than those which are specific to one situation.The processes considered range from resonant three-wave interactions in homogeneous and inhomogeneous plasmas to situations in which the plasma parameters themselves vary as a result of the interactions under consideration. The understanding of most processes is now reasonably complete but general statements about which non-linear process will dominate are still difficult to make and the goal of describing the properties of any particular turbulent plasma still lies ahead.

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Sideband Dispersion

Cited by 21 publications

References 17 publications

Magnetic dipole transitions in atomic and particle physics: ions and psions

Magnetic dipole transitions in atomic and particle physics: ions and psions

The decay instability of Langmuir waves in the non-neutral electron plasma column

Microinstabilities in plasmas-non-linear effects

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