Investigation on the lifetime and temperature distribution of tungsten filament cathodes in a magnetized plasma

Authors

Marko E. Arciaga ⋅ PH National Institute of Physics, University of the Philippines Diliman
Toshiro Kasuya ⋅ JP Department of Electronics, Doshisha University, Japan
Alexander G. Mendenilla ⋅ JP Department of Electronics, Doshisha University, Japan
Motoi Wada ⋅ JP Department of Electronics, Doshisha University, Japan
Henry J. Ramos ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Dependence of the lifetime of a high temperature (about 3100 K) discharge cathode filament upon the filament diameter, shape, and the presence of external magnetic field were investigated. Without the presence of an external magnetic field, the lifetime of the filament was found to increase with the filament diameter and was independent of the filament shape. An external magnetic field of 60 Gauss did not change the lifetime of a spiral filament, but substantially decreased that of a hairpin filament down to 74%. In the presence of a 5 mTorr argon gas discharge, the negative terminal of the filament became hotter than the positive terminal due to E × B drift, causing breakage near the negative terminal of the filament.

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Issue

2003: Proceedings of the 21st Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2003-PA-31

Section

Poster Session PA

Published

2003-10-22

How to Cite

[1]

ME Arciaga, T Kasuya, AG Mendenilla, M Wada, and HJ Ramos, Investigation on the lifetime and temperature distribution of tungsten filament cathodes in a magnetized plasma, Proceedings of the Samahang Pisika ng Pilipinas 21, SPP-2003-PA-31 (2003). URL: https://proceedings.spp-online.org/article/view/SPP-2003-PA-31.