Observation of Electron Density Rollover in Hydrogen Plasma Produced with DT-ALPHA Device

The rollover of electron density, a common indicator for the onset of volumetric recombination, was observed in hydrogen plasma, for the first time in the DT-ALPHA. Electron density and electron temperature were measured near the plasma production region and secondary gas feeding position with vario...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Plasma and Fusion Research 2022/06/22, Vol.17, pp.1201082-1201082
Hauptverfasser: YOSHIMURA, Keigo, TAKAHASHI, Hiroyuki, SEINO, Tomohiro, KUSABIRAKI, Kaoru, SAKATA, Yuki, NISHIMURA, Ryota, MATSUYAMA, Akinobu, TOBITA, Kenji
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The rollover of electron density, a common indicator for the onset of volumetric recombination, was observed in hydrogen plasma, for the first time in the DT-ALPHA. Electron density and electron temperature were measured near the plasma production region and secondary gas feeding position with various conditions regarding the amount of hydrogen secondary gas. A rollover of electron density was observed at the secondary gas feeding position, whereas electron density near the plasma production region remained nearly constant. This behavior indicates an enhancement of hydrogen molecular-activated recombination.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.17.1201082