Thermal Behaviour of Helix Bundle in a Traveling-Wave Tube

Gahlaut, V and Alvi, PA and Sharma, RK and Srivastava, V and Ghosh, S (2011) Thermal Behaviour of Helix Bundle in a Traveling-Wave Tube. In: National Symposium on Materials for Advanced Technology (NSMAT 2011), March 27-29, 2011, Banasthali University, Banasthali. (Submitted)

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Abstract

Average rf power of a traveling-wave tube (TWT) is restricted due to thermal management of helix slow-wave structure (SWS). In TWTs, the heat generated in the helix SWS is taken out through thermal conductive dielectric supports to the metal envelope. For uniform heat dissipation, thermal contact resistance between helix to support rod and support rod to metal envelope should be as minimum as possible. However, when two or more dissimilar metals are force fitted and or joined together heat drainage from source (SWS) is reduced due to increase in thermal contact resistances at the joints. This, in turn, restricts proper thermal drainage from the helix and, finally, causing destruction of the TWT. In this paper, authors have studied, thermal contact resistances and its effect on temperature distribution of a helix bundle both analytically and using commercially available CAD tools and, presented here, for a wideband high power TWT.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	TWT, SWS,TCR, helix bundle
Subjects:	?? TK ?? Microwave Tubes > Travelling Wave Tubes
Divisions:	Microwave Tubes
Depositing User:	Mr. Rabin Chatterjee
Date Deposited:	23 May 2013 08:53
Last Modified:	23 May 2013 08:53
URI:	http://ceeri.csircentral.net/id/eprint/75

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