Parametric amplification in a low-density plasma sheath

Carneiro, L. T.; Rapozo, C. da C.

doi:10.1103/physreva.43.4473

Cited by 1 publication

(4 citation statements)

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“…If the plasma impedance Z,(w,) was a pure nonlinear capacitive reactance, the profile of the transducer gain K,(w, ) close to the resonance frequency w,, of Z , ( w , ) would be symmetric. In our experiment, however, the additional components, R,, L, and C, lead to an asymmetry of the profile of K,(w,) [9]. I increase, while I Z,(w,) I decreases.…”

Section: Experimental Results and Analysiscontrasting

confidence: 59%

“…conductance of the sheath in a low density helium plasma applied in the parametric amplification. The helium plasma was created in the metallic cylindrical vessel of the linear mirror device LISA [9].…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…The parametric amplification caused by the variation of the sheath capacitance C, with the applied r.f. voltage results in a transducer gain given by Carneiro and Rapozo [9] is…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…In this work we consider the results obtained from the electrical model that we derived for the plasma sheath region [5], where the nonlinear characteristic of the sheath capacitance was used in parametric amplification of radio-frequency signals.…”

Section: Introductionmentioning

confidence: 99%

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The negative r.f. conductance of the sheath in a low density plasma

Carneiro

Rapozo

1991

Phys. Scr.

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In this work we use nonlinear sheath capacitance properties in low density plasma to produce parametric amplification of an r.f. signal in the high frequency band (H.F.).The experiment has been carried out in the linear mirror device LISA of the Universidade Federal Fluminense (UFF), where a helium plasma was produced by a radio-frequency source of 30 MHz with a power which can be varied from 10 watts to 100 watts.The experimental results show a r.f. signal amplification at 5 MHz with a transducer gain of 5.7. It shows good agreement with the theoretical results of a classical analysis of parametric amplification with a nonlinear device.

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Section: Experimental Results and Analysiscontrasting

confidence: 59%

Section: Experimental Results and Analysismentioning

confidence: 99%

“…The parametric amplification caused by the variation of the sheath capacitance C, with the applied r.f. voltage results in a transducer gain given by Carneiro and Rapozo [9] is…”

Section: Experimental Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations