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  Development of large RF driven negative ion sources for neutral beam injection

Kraus, W., McNeely, P., Franzen, P., Entscheva, A., Bandyopadhyay, M., Heinemann, B., et al. (2003). Development of large RF driven negative ion sources for neutral beam injection. Fusion Engineering and Design, 66-68, 491-495. doi:10.1016/S0920-3796(03)00083-8.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-30FB-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3101-0
Genre: Journal Article

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 Creators:
Kraus, W.1, Author              
McNeely, P.1, 2, 3, Author              
Franzen, P.1, Author              
Entscheva, A.1, Author              
Bandyopadhyay, M.1, Author              
Heinemann, B.1, Author              
Riedl, R.1, Author              
Speth, E.1, Author              
Wilhelm, R.1, Author              
Affiliations:
1Technology (TE), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856318              
2W7-X: Heating (HT), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856343              
3W7-X: Heating and CoDaC (HC), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856306              

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Free keywords: 22nd Symposium on Fusion Technology (SOFT 2002), Helsinki, 2002-09-09 to 2002-09-13
 Abstract: The development of a large-area RF source for the negative ion beam production has been continued concentrating on investigations of volume-mode Cs-free operation. In contrast to most arc discharge sources the extracted H- current density can be significantly improved in the RF source by the addition of argon. Probe measurements close to the plasma grid show that this enhancement is due to a dramatically increased plasma density with the addition of argon. Variation of the number of extraction holes and of the effective transparency showed no dependence of the current density on the extraction area or on the transparency, however, still at a rather low level. The H- current density that has been reached at present amounts to about 5 mA/cm² at 100 kW and 0.6 Pa without cesium as published previously. In order to investigate the role of the magnetic filter, a large electromagnet has undergone first tests. Preliminary results show no strong dependence on the magnetic field.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

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Title: Fusion Engineering and Design
  Alternative Title : Fusion Eng. Des.
Source Genre: Journal
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Publ. Info: Copyright © 2003 Elsevier B.V. All rights reserved
Pages: - Volume / Issue: 66-68 Sequence Number: - Start / End Page: 491 - 495 Identifier: -