A Novel Geometry Multi-Stage Depressed Collector for the Efficiency Enhancement of Space Traveling Wave Tubes

Latha, A. Mercy; Gahlaut, Vishant; Kaur, Jaspreet; Bharti, Dheeraj; Srivastava, V.; Sharma, Rajendra K.; Ghosh, S. K.

doi:10.1007/s10762-012-9951-5

Cited by 23 publications

(4 citation statements)

References 14 publications

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“…2) has been designed for a K u-band space TWT (with a beam voltage of 5.9 kV and a beam current of 100 mA) using EGUN [11] and validated using CST Particle Studio [12]. The internal corrugations in the electrode geometry result in a creation of concave equipotential lines within the MDC, which aids in better sorting of the electrons [10].…”

Section: Design Of the MDCmentioning

confidence: 99%

“…To accomplish the design goal of size and weight reduction without performance degradation, a novel modification on the inner geometry of the electrodes has been made [10]. In [10], the novel geometry modification has been done without changing the size of the MDC, where it has been demonstrated to enhance the collector efficiency and reduce the back-streaming in the MDC.…”

Section: Introductionmentioning

confidence: 99%

“…In [10], the novel geometry modification has been done without changing the size of the MDC, where it has been demonstrated to enhance the collector efficiency and reduce the back-streaming in the MDC.…”

Section: Introductionmentioning

confidence: 99%

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Design and Development of a Novel, Compact, and Light-Weight Multistage Depressed Collector for Space TWTs

Latha

Ghosh

2016

IEEE Trans. Electron Devices

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Space traveling wave tubes (TWTs), which are used in satellite communications, need to be compact and light weight, and have high overall efficiency. In a typical TWT, ∼45% of the weight is due to the collector, which is normally made bulkier to dissipate the waste heat. Hence, reduction in size and weight of the collector will lead to huge savings in the weight of the entire TWT, thereby impacting significantly on the launch cost of the satellite. However, reduction in size and weight of the collector has several associated bottlenecks and challenges. Here, we have successfully addressed those challenges and have developed a novel, compact, and light-weight multistage depressed collector (MDC). The novelty of the MDC is in the shape of the electrodes, which has been modified to have internal corrugations. Due to this geometry modification, the MDC offers ∼76% weight reduction that, in turn, translates into ∼35% weight reduction of the TWT, which greatly impacts the launch cost of the communication satellite. Furthermore, no deterioration in electrical and thermal performance has been observed in this compact MDC design.

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Section: Design Of the MDCmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Development of a Novel, Compact, and Light-Weight Multistage Depressed Collector for Space TWTs

Latha

Ghosh

2016

IEEE Trans. Electron Devices

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“…electrode surface [9], [10]; 4) modification of electrode geometry [11]; and 5) use of asymmetric fields [12]- [14].…”

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confidence: 99%

Techniques for the Development of Multistage Depressed Collectors

Latha

Sharma

Kumar

et al. 2015

IEEE Trans. Electron Devices

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Multistage depressed collectors (MDCs) play a vital role in efficiency enhancement of traveling-wave tubes for various strategic and communication applications. Design of a highly efficient MDC is no longer a tough challenge due to the availability of large number of efficient numerical simulation tools. However, still an established technique for the development of such MDCs to address their thermal as well as high-voltage breakdown issues has not been published. In this paper, we have exercised different development techniques in the light of specified meritorious aspects with respect to actual dimensional accuracies, thermal dissipation, and high-voltage withstanding capability. We have made use of an analytical method to estimate the proper braze alloy quantity and holding time during brazing operation to ensure optimum brazing, thereby, yielding minimum thermal impedance and improved high-voltage breakdown strength.Index Terms-Analytical model, brazing quality, high-voltage breakdown, multistage depressed collectors (MDCs), thermal dissipation, traveling-wave tube (TWT).

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Suppression of secondary electron emission of oxygen free copper by two-step electrodeposition of rGO/Cu composite coating

Zhang

Lu³

et al. 2023

Applied Surface Science

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A Novel Geometry Multi-Stage Depressed Collector for the Efficiency Enhancement of Space Traveling Wave Tubes

Cited by 23 publications

References 14 publications

Design and Development of a Novel, Compact, and Light-Weight Multistage Depressed Collector for Space TWTs

Design and Development of a Novel, Compact, and Light-Weight Multistage Depressed Collector for Space TWTs

Techniques for the Development of Multistage Depressed Collectors

Suppression of secondary electron emission of oxygen free copper by two-step electrodeposition of rGO/Cu composite coating

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