Impurity behavior during ion-Bernstein wave heating in PBX-M

Technical Report · Thu Sep 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10180377· OSTI ID:10180377

Isler, R C; Post-Zwicker, A P ^[1]; Paul, S F; Tighe, W; Ono, M; LeBlanc, B P; Bell, R; Kugel, H W; Kaita, R ^[2]

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1. Oak Ridge National Lab., TN (United States). Fusion Energy Div.
2. Princeton Plasma Physics Lab., NJ (United States)

Ion-Bernstein-wave heating (IBWH) has been tested in several tokamaks. In some cases the results have been quite positive, producing temperature increases and also improving both energy and particle confinement times, whereas in others, no distinctive changes were observed. Most recently, IBWH has been utilized in the Princeton Beta Experiment-Modified (PBX-M) where the long-range goal is the achievement of operation in the second stable region by current and pressure profile control. Investigations have been performed in this machine using IBWH as the sole source of auxiliary power or using IBWH in conjunction with neutral-beam injection (NBI) or with lower-hybrid current drive (LHCD). Impurity studies seem particularly important for IBWH since not only have influxes often been observed to increase, but the global impurity confinement time has also been shown to lengthen as the confinement of the working gas improved. The authors present here a set of characteristic experimental results regarding the impurity behavior in PBX-M; in general, these are consonant with previous observations in other tokamaks.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10180377
• Report Number(s): CONF-940635--13; ON: DE94018114
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330
CARBON IONS
CHARGED-PARTICLE TRANSPORT
ELECTRON DENSITY
EXPERIMENTAL DATA
FAR ULTRAVIOLET RADIATION
IRON IONS
MULTICHARGED IONS
NICKEL IONS
OXYGEN IONS
PBX DEVICES
PLASMA CONFINEMENT
PLASMA HEATING
PLASMA IMPURITIES
PLASMA KINETICS, TRANSPORT, AND IMPURITIES
ULTRAVIOLET SPECTRA