Prepulse Suppression on a High-Power Electron Beam Accelerator Using a Dielectric Cathode Holder

Roy, Amitava; Mitra, S.; Menon, R.; Kumar, Dinesh; Kumar, Satendra; Sharma, Archana; Mittal, K. C.; Nagesh, K. V.; Chakravarthy, D. P.

doi:10.1109/tps.2008.2006473

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…To avoid surface tracking at the PFL-antenna interface, corrugations at the surface of dielectric are used. 27 This analysis ensures the suitability of designed antenna for power ranges upto 1 GW.…”

Section: High Power Analysis Of Antennamentioning

confidence: 83%

“…After this due to flaring of antenna plates, spacing between two conductors increases which results in gradual decrease of electric field across the length of TEM horn antenna. To avoid surface tracking at the PFL‐antenna interface, corrugations at the surface of dielectric are used 27 . This analysis ensures the suitability of designed antenna for power ranges upto 1 GW.…”

Section: Tem Horn Design Along With Feedmentioning

confidence: 99%

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High power balanced TEM horn antenna for ultra wide band radiator

Singh

Chandra

Mitra

et al. 2022

Micro & Optical Tech Letters

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A balanced transverse electromagnetic (TEM) horn type antenna is designed and developed for a 120 kV, 66 Ω high power ultra wideband (UWB) radiator. This antenna consists of a coaxial to parallel plate unzipper BALUN followed by an exponentially tapered TEM horn structure. Analysis of this antenna in time and frequency domain is performed using CST Microwave Studio. This antenna is having a power handling capacity of 1000 MW, with percentage bandwidth of 167%. This antenna has a gain of ~10 dB at 1 GHz frequency. Return loss performance of better than −10 dB is observed in 150 MHz to 1 GHz frequency range. Effective radiation of short pulses (<5 ns) with very fast rise time (300–500 ps) has been demonstrated using this high‐power antenna. Practical results at 220 MW power are presented in this article. Directional performance of this antenna is practically established through peak power patterns in horizontal and vertical plane.

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Section: High Power Analysis Of Antennamentioning

confidence: 83%

Section: Tem Horn Design Along With Feedmentioning

confidence: 99%

High power balanced TEM horn antenna for ultra wide band radiator

Singh

Chandra

Mitra

et al. 2022

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

show abstract

Plasma expansion and fast gap closure in a high power electron beam diode

et al. 2009

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High power electron beam generation studies were carried out in a planar diode configuration to investigate the effect of the accelerating gap, diode voltage, and anode-cathode materials on the electrode plasma expansion. The diode voltage has been varied from 145–428 kV, whereas the current density has been varied from 208–2215 A/cm2 with 100 ns pulse duration. It was found that the diode voltage and current follow the bipolar space-charge limited flow model. The anode and cathode plasma expansion velocities were calculated using the perveance data. The plasma expands at 11 cm/μs for 34 mm anode-cathode gap and the plasma velocity decreases for smaller gaps. It was found that the plasma expansion velocity increases significantly due to the cathode edge contribution and the edge contribution is particularly important during the beginning and the end of the accelerating pulse when the diode voltage and the corresponding electric field are comparatively low. It was also observed that the diode current increased by a factor of 3 when anode material was released into the accelerating gap due to the electron beam bombardment.

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