Plasma potential formation and measurement in TMX-U and MFTF-B (invited)

Journal Article · Wed May 01 04:00:00 EDT 1985 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138057· OSTI ID:5639621

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.

• Research Organization: Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
• OSTI ID: 5639621
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 56:5; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
BEAM INJECTION
BEAM-PLASMA SYSTEMS
CONFINEMENT
ELECTRIC POTENTIAL
ELECTROSTATICS
IN-BEAM SPECTROSCOPY
ION PROBES
ION SPECTROSCOPY
MAGNETIC MIRRORS
MFTF DEVICES
NEUTRAL ATOM BEAM INJECTION
OPEN PLASMA DEVICES
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PROBES
SPECTROSCOPY
TANDEM MIRRORS
THERMONUCLEAR DEVICES
TMX DEVICES