Noise emission and Landau damping of Tonks-Dattner resonances

Prinzler, H.

doi:10.1088/0032-1028/11/6/004

Cited by 3 publications

(6 citation statements)

References 11 publications

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“…14 with the results of some former investig a t' lolls of the TD spectrum in the linear region [28] we conclude W / Y = 30 for n = 1...3 mainly caused by Landau damping. The field distribution is shown in Fig.…”

Section: F I E L D S T R E N G T H Ssupporting

confidence: 72%

“…6. The value Y / W r 1/30 was assumed for the damping [28]. The local field maxiinurn occurs a t w H wp, 'its magnitude is determined by the aperiodic term EA rather than by the wave term E,, p pi, approximation for small argumenls E/IJ/wtol It becomes obvious that the field enhancement in the resonance case only depends on the relation between scalelength and Debye length at w = wP(xR).…”

Section: Hydrodynamic Approximationmentioning

confidence: 99%

“…(20) [IS]. using the relation given in [28] we obtain Po = available pump power, 2, = characteristic line impedance of the wave-guide. The maximum current and also the maximum fieldstrength occur a t the series resonances, marked by a maximum of the reflexion coefficient Irl.…”

Section: (23)mentioning

confidence: 99%

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Linear and Nonlinear Wavetransformation and Absorption in the Inhomogeneous Plasma Capacitor

Heymann¹,

Prinzler²

1977

Contrib Plasma Phys

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The parametric decay process in inhomogeneous layers existing near the plasma boundaries or in front of antennas and probes in a plusma has been investigated. The linear enhancement of the punip field near w = up, the threshold fieldstrength, the wavenumber selection rules and the influence of spontaneous low frequency floctuittions atre discussed in detail using n one-climensiond model of the inhoniogeneous plasma capacitor. According to this model the instabilities appear in the layers with rr~axinium linear transformation and (linear) absorption. In addition, :I strong nonlinear part of absorption in the presence of the instiibility has been observed.The level of the spontaneous low frequency fluctuations influences strongly the spectrum of the parametrically excited ion witves. The experiments show a redistribution of the trmsferred ion acoostic wave energy over the whole w

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Section: F I E L D S T R E N G T H Ssupporting

confidence: 72%

Section: Hydrodynamic Approximationmentioning

confidence: 99%

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Linear and Nonlinear Wavetransformation and Absorption in the Inhomogeneous Plasma Capacitor

Heymann¹,

Prinzler²

1977

Contrib Plasma Phys

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“…Our installation was similar to that used for the investigation of Tonks-Dattner-rcsonances [12], in addition a pair of watercooled Helmholtz-coils produce the axial magnetic field up to 800 G a d . I n the region of active plasma parts the homogeneity of the magnetic fields was better than…”

Section: Experimental Set Upmentioning

confidence: 99%

“…I n order to relate this quantity to the total absorption coefficient A ( w , / w ) , we use theequivalent circuit of our aPangementFig. 1, see [12]. We oht,ain ZL Re 2 , where we have introduced Co = E~ F/2a.…”

Section: Total Absorption and Field Ratiomentioning

confidence: 99%

Resonances, Absorption and Linear Excitation of Cyclotron Harmonic Waves in a Discharge Plasma

Prinzler¹

1974

Contrib Plasma Phys

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Standing cyclotron harmonic waves below the second harmonic are observed using the noise radiation of a mercury discharge tube a t 1465 MHz. From the positions of the Buchsbaum-Hasegawa resonances the density profile and the electron temperature are derived, these parameters agree quite well with the behaviour of the collision-free, magnetized plasma column.X onedimensional model applicable to our waveguide geometry is developed taking into account linear excitation of cyclotron harmonic waves by a quasistationary external field in a bounded plasma.Absorption and excitation are controlled by the scale length L, a t the hybrid point and a coupling length 1, introduced by Eq. (20); the electron gyration radius re, scale length L,, coupling length 1, and slab thickness 2a obeying the relation I , < I, = L, < 2a. The main absorption is caused by enhanced collisional damping a t the upper hybrid region and only a small fraction being dissipated in the wave mode, though its field strength is largecompared with that at the plasma boundary An estimation of the mean field strength within the coupling region shows, that such a low power as 1 mW/cmz absorbed in the hybrid region may produce fieldstrength exceeding the typical threshold values for non-linear excitation mechanism.(4dW F w 6).

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Influence of Beam and Plasma Noise on the Instability of the “Fast Electron Beam–Confined Collisional Plasma” System. Kinetic Consideration

Сухомлинов

Mustafaev²,

Zaitsev

et al. 2022

J. Phys. Soc. Jpn.

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Noise emission and Landau damping of Tonks-Dattner resonances

Cited by 3 publications

References 11 publications

Linear and Nonlinear Wavetransformation and Absorption in the Inhomogeneous Plasma Capacitor

Linear and Nonlinear Wavetransformation and Absorption in the Inhomogeneous Plasma Capacitor

Resonances, Absorption and Linear Excitation of Cyclotron Harmonic Waves in a Discharge Plasma

Influence of Beam and Plasma Noise on the Instability of the “Fast Electron Beam–Confined Collisional Plasma” System. Kinetic Consideration

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