Characteristics of multiantenna rf ion source
Journal Article
·
· Review of Scientific Instruments
- Nagoya University, Nagoya 464-8603 (Japan)
We have developed a new multiantenna rf ion source for neutral beam injection and studied the effects of different antennas, connected in parallel, on the hydrogen plasma characteristics. The four-antenna elements 20 cm long are installed inside the 35x35x21 cm{sup 3} rectangular bucket chamber. The maximum rf power of 40 kW at 9 MHz is used. The ion current, electron temperature, and plasma potential for the hydrogen pressure of a few mtorr are 20-70 mA/cm{sup 2}, 3-10 eV, and 0-10 V, respectively. The increasing numbers of parallel antennas improve the available rf power input and change the plasma parameters. The calculation demonstrates that the uniform density profile can be obtained by controlling the rf current of antenna array.
- OSTI ID:
- 20779070
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 77; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
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