Development of a Bernas-type ion source with an AC current driven filament cathode

Authors

Naoki Miyamoto ⋅ JP Graduate School of Science and Engineering, Doshisha University
Yuki Takahashi ⋅ JP Graduate School of Science and Engineering, Doshisha University
Toshiro Kasuya ⋅ JP Graduate School of Science and Engineering, Doshisha University
Motoi Wada ⋅ JP Graduate School of Science and Engineering, Doshisha University

Abstract

A modified Bernas-type ion source has been operated with the hot cathode heated by AC electrical power. A power amplifier coupled to a signal generator supplied the filament heating current of the frequency up to about 10 kHz. A hair-pin shaped tungsten filament cathode has excited a steady state plasma in a linear magnetic field. The discharge current fluctuated due to AC heating of the filament but the amplitude of the fluctuation in the discharge current can be reduced down to less than 2 % of the average discharge current. The AC operation of the filament has realized a prolonged lifetime of up to about 150% times an ordinary DC heated filament.

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Issue

2012: Proceedings of the 30th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2012-2B-5

Section

Plasma Physics

Published

2012-10-22

How to Cite

[1]

N Miyamoto, Y Takahashi, T Kasuya, and M Wada, Development of a Bernas-type ion source with an AC current driven filament cathode, Proceedings of the Samahang Pisika ng Pilipinas 30, SPP2012-2B-5 (2012). URL: https://proceedings.spp-online.org/article/view/SPP2012-2B-5.