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

Conference · Fri Sep 28 00:00:00 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
• Resource Relation: Conference: 5. topical conference on high temperature plasma diagnostics, Lake Tahoe, NV, USA, 16 Sep 1984
• Country of Publication: United States
• Language: English

Related Subjects

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