Plasma potential formation and measurement in TMX-U and MFTF-B

Conference · Fri Sep 28 04:00:00 EDT 1984

OSTI ID:6462260

Grubb, D P

Tandem mirrors control the axial variation of the plasma potential to create electrostatic plugs that improve the axial confinement of central cell ions and, in a thermal barrier tandem mirror, control the electron axial heat flow. Measurements of the spatial and temporal variations of the plasma potential are, therefore, important to the understanding of confinement in a tandem mirror. In this paper we discuss potential formation in a thermal barrier tandem mirror and examine the diagnostics and data obtained on the TMX-U device, including measurements of the thermal barrier potential profile using a diagnostic neutral beam and charged particle energy-spectroscopy. We then describe the heavy ion beam probe and other new plasma potential diagnostics that are under development for TMX-U and MFTF-B and examine problem areas where additional diagnostic development is desirable.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6462260
• Report Number(s): UCRL-91506; CONF-8409157-5; ON: DE85002173
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700104* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Experimental-- (-1987)
ATOMIC BEAMS
BEAMS
CHARGED PARTICLES
ELECTRIC POTENTIAL
ELECTROSTATICS
ENERGY SPECTRA
MAGNETIC MIRRORS
MFTF DEVICES
OPEN PLASMA DEVICES
PLASMA DIAGNOSTICS
PLUGGING
SPECTRA
TANDEM MIRRORS
THERMAL BARRIERS
THERMONUCLEAR DEVICES
TMX DEVICES