An electrostatic electron energy analyser has been inserted for the first time in the outer region of the RFX reversed-field pinch experiment, in order to investigate and characterize the presence of a superthermal electron population. It has been found that these electrons carry most of the current density parallel to the magnetic field. The time evolution during a single discharge of the superthermal electrons current density and parallel temperature indicates that the distortion of the electron distribution function is stationary during the plasma current flat-top phase. The dependence of the superthermal temperature on the plasma parameters has been investigated by varying the plasma density, and a relationship with the ratio of the on-axis applied electric field to the critical electric field for runaway generation has been identified.
Yagi, Y., Antoni, V., Bagatin, M., Desideri, D., Martines, E., Serianni, G., et al. (1997). Measurement of superthermal electron flow and temperature in a reversed-field pinch experiment by an electrostatic electron energy analyser. PLASMA PHYSICS AND CONTROLLED FUSION, 39(11), 1915-1927 [10.1088/0741-3335/39/11/010].
Measurement of superthermal electron flow and temperature in a reversed-field pinch experiment by an electrostatic electron energy analyser
Martines E;
1997
Abstract
An electrostatic electron energy analyser has been inserted for the first time in the outer region of the RFX reversed-field pinch experiment, in order to investigate and characterize the presence of a superthermal electron population. It has been found that these electrons carry most of the current density parallel to the magnetic field. The time evolution during a single discharge of the superthermal electrons current density and parallel temperature indicates that the distortion of the electron distribution function is stationary during the plasma current flat-top phase. The dependence of the superthermal temperature on the plasma parameters has been investigated by varying the plasma density, and a relationship with the ratio of the on-axis applied electric field to the critical electric field for runaway generation has been identified.File | Dimensione | Formato | |
---|---|---|---|
010 - PPCF 97 superthermal electrons.pdf
Solo gestori archivio
Tipologia di allegato:
Publisher’s Version (Version of Record, VoR)
Dimensione
178.62 kB
Formato
Adobe PDF
|
178.62 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.