A comprehensive review of depressed collectors of slow-wave devices

ABSTRACT

Collectors are an indispensable part of any vacuum microwave devices where the electron beam – so-called spent electron beam emerged from interaction structure – is collected. Although the first publication on depressed collectors dates back to 1940s, several evolving researches are still being carried out on collectors till date. The incessant publications from researchers all over the globe reveal the fact that this field has much more potential and vigor to be explored. The outcome of such intensive and diversified research has been in achieving several novel design variants in the geometry, different computer-aided modeling and design optimization techniques, innovative methods to counter/suppress secondary electrons. This comprehensive review has been intended to cover all the major research findings consolidating them at one place so that it could be beneficial to any new reader in this field, thereby further research progress may be accelerated.

KEYWORDS:

• Collectors
• slow-wave devices
• novel designs
• computer-aided modeling
• design optimization
• secondary emission suppression

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Acknowledgements

Authors would like to thank the Director, CSIR-CEERI for granting permission to publish this work. Authors are also grateful to the funding agencies – ISRO and CSIR, for providing the necessary support. Authors are indebted to the other TWT team members for their cooperation, help, and valuable suggestions.

Disclosure statement

No potential conflict of interest was reported by the authors).

Additional information

Notes on contributors

A. Mercy Latha

A. Mercy Latha joined Central Electronics Engineering Research Institute (CEERI), Pilani as a Scientist in 2011 and received her Ph.D from Academy of Scientific and Innovative Research (AcSIR) on Multi-stage Depressed Collectors (MDCs).

S. K. Ghosh

S. K. Ghosh received his Ph. D. in Microwave Engineering from Banaras Hindu University, Varanasi in 1996. He is currently working as Senior Principal Scientist in CSIR – CEERI, Pilani, India.