Correlation of electrostatic fluctuation and reversal of toroidal field in the reversed-field pinch plasma

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3596540· OSTI ID:21546992

Yambe, Kiyoyuki; Koguchi, Haruhisa; Sakakita, Hajime; Hirano, Yoichi; Kiyama, Satoru ^[1]

---

1. Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568 (Japan)

The magnetic fluctuations and electrostatic probe potential have been measured in the Toroidal Pinch Experiment - RX (TPE-RX) reversed-field pinch plasma [Y. Yagi et al., Fusion Eng. Des. 45, 421 (1999)] (at the plasma surface r/a = 1.00). Fast electrons with energy comparable to or slightly higher than the core electron temperature are observed as many spikes in the electrostatic probe signal. These electrons are diffused by a fluctuating magnetic field from the core region. During the period of mild deepening of the reversal of the edge toroidal field, a significant reduction in the spike signal, increases in electron density and soft x-ray radiation, and a decrease in the D{alpha} line radiation are observed, even though the reduction in magnetic fluctuations is not significant during the same period, which indicates that the mild deepening of the reversal of the toroidal field can improve the confinement of fast electrons.

• OSTI ID: 21546992
• Journal Information: Physics of Plasmas, Vol. 18, Issue 6; Other Information: DOI: 10.1063/1.3596540; (c) 2011 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CORRELATIONS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
ELECTROSTATIC PROBES
FLUCTUATIONS
MAGNETIC FIELDS
PLASMA
REVERSE-FIELD PINCH
SOFT X RADIATION
TPE-RX DEVICE
CLOSED PLASMA DEVICES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
IONIZING RADIATIONS
LEPTONS
PINCH DEVICES
PINCH EFFECT
PROBES
RADIATIONS
REVERSED-FIELD PINCH DEVICES
THERMONUCLEAR DEVICES
TOROIDAL PINCH DEVICES
VARIATIONS
X RADIATION