High-power radio frequency generation in a hollow-cathode discharge

Arbel, D.; Bar-Lev, Z.; Felsteiner, J.; Rosenberg, A.; Slutsker, Ya. Z.

doi:10.1063/1.113854

Cited by 20 publications

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“…For all generators described in [1][2][3][4][5][6], the HF emis sion is limited from above by the frequency of 200 MHz. The general task of the present investigation is further elevation of the generation frequency, which is accompanied by the transition to the microwave range.…”

Section: Intense Superminiature Beamless Generators In Gas Dischargementioning

confidence: 99%

“…The same phenomenon can be used to generate intense pulses of coherent HF radiation. In [1][2][3], the Technion group from Israel has pre sented the first designs and results of studies for intense HF pulse generators based on gas discharge hollow cathode chambers. The best results of this group, which were obtained in different regimes, are the fol lowing: the maximum duration of HF pulses is 11.5 μs, their maximum intensity is 121 kW, the high frequency is 35-39 MHz, and the pulse repetition rate attains 100 Hz (in Xe at a pressure of 19-21 mTorr) [3].…”

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Intense superminiature beamless generators in gas-discharge microwave electronics

et al. 2012

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Section: Intense Superminiature Beamless Generators In Gas Dischargementioning

confidence: 99%

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Intense superminiature beamless generators in gas-discharge microwave electronics

et al. 2012

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“…We have also shown recently the potential of such a device to serve as a powerful rf oscillator and suggested a scheme of using it. 2 Here we present experimental data showing the maximal capabilities of this kind of rf oscillator and discuss the physical processes controlling the oscillator parameters in view of its practical application.…”

Section: Introductionmentioning

confidence: 99%

Optimized performance of a powerful hollow-cathode rf oscillator

Felsteiner

Ish-Shalom

Slutsker

1998

Journal of Applied Physics

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We have studied the power, efficiency, and frequency ranges achievable for a hollow-cathode based rf oscillator. We have found that the rf component of the discharge current can be much larger (up to ∼4.5 times) than its dc component. In the achievable frequency range of 15–120 MHz, this very simple cold cathode device produces up to 40 kW of rf power with efficiency of up to 25%. The internal resistance of this device always remained within a convenient range of 20–40 Ω. The rf pulse duration could be prolonged up to tens of μs. The physical processes governing the oscillator parameters are discussed.

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“…In terms of their simplicity, reliability, and effectiveness, generators of high-power high-frequency pulses based on the hollow-cathode discharge [1,2] can be promising for many scientific and practical applications.…”

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High-power pulsed high-frequency generator based on the hollow-cathode discharge

Дубинов

L’vov

Sadovoy

et al. 2006

Radiophys Quantum Electron

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We describe a high-power high-frequency generator based on the hollow-cathode gas discharge. In the frequency range from 10 to 30 MHz, the output-signal power of this simple device with a cold cathode reaches 1 MW. The duration of the high-frequency pulse ranges from 0.4 to 1 µs.In terms of their simplicity, reliability, and effectiveness, generators of high-power high-frequency pulses based on the hollow-cathode discharge [1, 2] can be promising for many scientific and practical applications.The nature of the hollow-cathode discharge considered in detail in [3] provides a sufficient number of oscillational degrees of freedom [4]. Earlier, observation of high-frequency oscillations of various natures in a hollow-cathode discharge was reported in [5,6]. Therefore, application of these oscillations for the generation purposes is a natural decision. The authors of [7] presented the results of the first stage of studying a high-frequency generator based on the hollow-cathode discharge.This paper describes a novel generator with the Fig. 1. Appearance of the gas-discharge chamber of a high-frequency generator.hollow-cathode discharge, which forms high-power highfrequency pulses in the load circuit. A possible explanation for the appearance of the instability responsible for the high-frequency generation in a hollow-cathode gas discharge was given in [8,9]. Namely, it is the cathode-layer instability that leads to negative differential conductance at a certain frequency. The basis of the generator is the gas-discharge chamber, whose appearance is shown in Fig. 1, and the design scheme, in Fig. 2. The hollow cathode, anode, and insulator are the main elements of the chamber. The hollow cathode was made of a 0.3-mm thick sheet of stainless steel. It was rolled into a cylinder with the required diameter 100-200 mm and fixed in the vacuum chamber by means of special clamp 4. To change the depth of the hollow cathode, sheets with different widths were used. In the experiments, the internal diameter of the cathode was 150 mm, and its length, 170 mm. Technological nozzle 1 for gas evacuation is fixed at the end of vacuum chamber 2 made of stainless steel. Anode 6 is a solid stainless-steel cylinder of 70 mm in diameter. It was located coaxially to the hollow cathode at a distance of 25 mm from its open end. The anode was fixed on caprolon disk 7 which served as the insulator and the vacuum-tight flange of the chamber.

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High-power radio frequency generation in a hollow-cathode discharge

Cited by 20 publications

References 0 publications

Intense superminiature beamless generators in gas-discharge microwave electronics

Intense superminiature beamless generators in gas-discharge microwave electronics

Optimized performance of a powerful hollow-cathode rf oscillator

High-power pulsed high-frequency generator based on the hollow-cathode discharge

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