Samenvatting
Here we report on efforts to improve performance and longevity of the Neutral Beam Injection (NBI) system by initiating a R&D program aimed at studying the most common failure mechanism for the ion sources. To this end a filament driven plasma chamber has been constructed with plasma parameters similar to the arc chamber of NBI ion sources. A preliminary report of an investigation into the most common failure is presented here: The failure mechanism observed during helium operations on DIII-D is the result of electrical breakdown of the insulation material that separates the filament plates from the anode. The fault is reproduced in a table top experiment analogous to the DIII-D NBI ion source in key parameters and proposals for amelioration of the issue are discussed.
| Originele taal-2 | Engels |
|---|---|
| Pagina's (van-tot) | 1605-1609 |
| Aantal pagina's | 5 |
| Tijdschrift | Fusion Engineering and Design |
| Volume | 146 |
| Vroegere onlinedatum | 5 apr. 2019 |
| DOI's | |
| Status | Gepubliceerd - sep. 2019 |
Financiering
This material was based upon work supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences , using the DIII-D National Fusion Facility, a DOE Office of Science user facility, under Award No. DE-FC02-04ER54698. This work was also supported by EUROfusion through The European Fusion Education Network and by Research Experience for Peruvian Undergraduates (REPU) program.