Investigation of a Relativistic Magnetron Supplied from a High-Current Linear Induction Accelerator

Vasil'ev, V. V.; Vintizenko, I. I.; Sulakshin, A. S.; Filipenko, N. M.; Fomenko, G. P.

doi:10.1023/b:rupj.0000020806.75142.b2

Cited by 2 publications

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“…13 and is shown in Fig.1. A 6-vane magnetron having an inner diameter of 50 mm was powered using a Linear Induction Accelerator (LIA) [14] with output voltage and current amplitudes up to ~400 kV and ~4kA, respectively, and accelerating pulse duration of ~150ns on Full Width Half Maximum (FWHM). Vacuum in the experimental chamber and magnetron was kept at ~5⋅10 -5 Torr.…”

Section: Methodsmentioning

confidence: 99%

Relativistic magnetron operation with explosive emission and ferroelectric plasma source cathodes

Hadas

Sayapin

Kweller

et al. 2009

2009 IEEE International Conference on Plasma Science - Abstracts

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In this report we present results of comparison of experimental research of the relativistic magnetron operation with commonly used explosive emission plasma cathode and novel ferroelectric plasma source (FPS) cathode. The experiments were carried with relativistic Sband magnetron powered by Linear Induction Accelerator (LIA) (~350kV, 4kA, 200ns). Using time-and spaceresolved electrical, optical and spectroscopic diagnostics plasma parameters (density, temperature and expansion velocity) were studied during the accelerating pulse. In the case of explosive emission plasma it was found that the plasma is not uniform and consists of separate plasma spots whose number increases during the accelerating pulse. It was shown that the microwave generation is accompanied by a significant increase in plasma density and ion temperature, up to ∼5·10 16 cm -3 and ∼8 eV, respectively. The plasma electron temperature was found to be ∼8 eV. It was shown that the plasma expansion velocity in the axial direction reaches ∼10 7 cm/s and ≤2·10 5 cm/s in the radial direction. Investigation of the plasma parameters during the magnetron operation with FPS cathode showed also increase of the plasma density up to ∼7·10 14 cm -3 electron and ion temperature up to ∼7 eV and ∼4 eV respectively. It was shown that the application of the ferroelectric plasma cathode allows one to avoid a time delay in the appearance of the electron emission, to achieve better matching between the magnetron and LIA impedances, and to increase significantly (~30%) the duration of the microwave pulse with a ~10% increase in the microwave power. The latter results in generation of microwave radiation to be 30% more efficient than with the use of explosive emission cathode where the efficiency ≤20 %.

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Section: Methodsmentioning

confidence: 99%