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Heating and stabilization by slow waves in the Tara tandem mirror

Conference · · AIP Conf. Proc.; (United States)
OSTI ID:6988195
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The Tara tandem mirror is typically run in an effectively axisymmetric configuration by not producing ..beta.. in the quadrupole anchor cells. Slow ion cyclotron wave excitation by a slot antenna located on a midplane bump in the magnetic field of the central cell provides plasma production and heating. Ion cyclotron resonances are at the minimum central cell fields on either side of the bump. Magnetic probe measurements have identified the slow wave excited by the antenna. Effective ion and electron heating is observed with a peak ..beta.. of over 2%. The ICRF also provides stabilization of an m = 1 flute mode which is otherwise unstable in axisymmetric mirror geometry. In conjunction with a magnetic divertor at the central cell midplane, the slow wave can stabilize not only the central cell plasma but additional plasma in the axisymmetric plug cells. Destabilizing ..beta.. can be produced in the plug cells by neutral beam injection, ICRF, or ECRH. By maintaining the stability of the plugs and central cell, end plugging using either ICRF or ECRH in the plug cells is obtained.
Research Organization:
Plasma Fusion Center, M.I.T., Cambridge, MA 02139
OSTI ID:
6988195
Report Number(s):
CONF-870570-
Conference Information:
Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 159:1
Country of Publication:
United States
Language:
English

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101 -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700107* -- Fusion Energy-- Plasma Research-- Instabilities
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
ANTENNAS
BETA RATIO
ELECTRICAL EQUIPMENT
EQUIPMENT
FLUTE INSTABILITY
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
INSTABILITY
MAGNETIC FIELDS
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
STABILIZATION
TANDEM MIRRORS
TARA DEVICES
THERMONUCLEAR DEVICES