Abstract
Tungsten surfaces with Nano-tendril bundles (NTBs), a collective group of fibrous nanostructures which forms isolated and grow up to tens of microns, are exposed to high density hydrogen plasmas. Under the conditions in which sheath thickness are comparable or smaller than the size of NTBs', with negative biasing voltage, the NTBs presented bright emission due to concentrated heating by incident ions, leading to the formation of hot spots. At the same time, arc traces are observed on the surface, but far from the NTBs area, suggesting that the concentrated heat load precedingly degrades NTB's tip, lowering the local field emission and hence arc ignition probability.
| Original language | English |
|---|---|
| Title of host publication | 2023 30th International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV 2023 |
| Publisher | Institute of Electrical and Electronics Engineers |
| Pages | 533-536 |
| Number of pages | 4 |
| ISBN (Electronic) | 978-4-88686-436-9 |
| DOIs | |
| Publication status | Published - 2023 |
| Externally published | Yes |
| Event | 30th International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV 2023 - Okinawa, Japan Duration: 25 Jun 2023 → 30 Jun 2023 |
Conference
| Conference | 30th International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV 2023 |
|---|---|
| Country/Territory | Japan |
| City | Okinawa |
| Period | 25/06/23 → 30/06/23 |
Keywords
- arcing
- hot spot
- nano-tendril bundles
- nanostructure
- tungsten