NDLI: Performance of a DIII-D Neutral Beam Ion Source with a New Accelerator Grid

Content Provider	IEEE Xplore Digital Library
Author	Hong, R.M. Scoville, B.G. Busath, J.L. Callis, R.W. Chiu, H.K. Grunloh, H.J. Hu, C. Madruga, M.G.
Copyright Year	2005
Description	Author affiliation: Gen. Atomics, San Diego, CA (Hong, R.M.; Scoville, B.G.; Busath, J.L.; Callis, R.W.; Chiu, H.K.; Grunloh, H.J.)
Abstract	The DIII-D tokamak utilizes seven neutral beam ion sources for plasma heating and current drive. These ion sources have performed with high availability and reliability since 1987. However, components of the ion sources, especially the grids of the accelerator, have since developed hardware failures either due to old age or fabrication defects. Due to lack of the plasma grid with diamond shape rails, we have built a plasma grid with circular cross section rails and installed it in one of the ion sources. Tests were performed on this ion source (we will call it the new ion source) and results were compared with one of the original ion sources. The new ion source runs just as reliably as the original ion sources, though the operation window is slightly smaller and the value of the optimum beam perveance is about 4% less (4% less beam current). This new ion source has been used to inject neutral beams into plasmas of the DIII-D tokamak to support physics experiments. No operational problems or difficulties were encountered during more than 5 weeks of operation. Details of the new plasma grid and the operational results will be presented
Starting Page	1
Ending Page	3
File Size	3013936
Page Count	3
File Format	PDF
ISBN	0424401596
DOI	10.1109/FUSION.2005.252935
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Particle beams Ion beams Ion sources Ion accelerators Plasma accelerators Plasma sources Tokamaks Rails Heating Availability ion source
Content Type	Text
Resource Type	Article

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Development and Fabrication of New Accelerator Grid Modules for Ion Sources in the 80 keV Neutral Beam Lines for DIII-D

Development for extending the beam pulse length of the DIII-D neutral besm System

Implementation of a quasi-realtime display of DIII-D neutral beam heating waveforms

New conditioning procedures derived from operating experience with the common DIII-D neutral beam ion source

Automated calculation of DIII-D neutral beam availability

Effects of operating parameters on the beam species of DIII-D neutral beam ion sources

Schemes and optimization of gas flowing into the ion source and the neutralizer of the DIII-D neutral beam systems

Beam current regulation of DIII-D neutral beam long pulse ion sources

Assessment of possible high-energy neutral beam injection in DIII-D

Performance of a DIII-D Neutral Beam Ion Source with a New Accelerator Grid

Similar Documents

Development and Fabrication of New Accelerator Grid Modules for Ion Sources in the 80 keV Neutral Beam Lines for DIII-D

Development for extending the beam pulse length of the DIII-D neutral besm System

Implementation of a quasi-realtime display of DIII-D neutral beam heating waveforms

New conditioning procedures derived from operating experience with the common DIII-D neutral beam ion source

Automated calculation of DIII-D neutral beam availability

Effects of operating parameters on the beam species of DIII-D neutral beam ion sources

Schemes and optimization of gas flowing into the ion source and the neutralizer of the DIII-D neutral beam systems

Beam current regulation of DIII-D neutral beam long pulse ion sources

Assessment of possible high-energy neutral beam injection in DIII-D

Performance of a DIII-D Neutral Beam Ion Source with a New Accelerator Grid