Plasma-parameter measurements using neutral-particle-beam attenuation

Technical Report · Wed Jul 07 00:00:00 EDT 1982

DOI:https://doi.org/10.2172/6772966· OSTI ID:6772966

Foote, J H; Molvik, A W; Turner, W C

Intense and energetic neutral-particle-beam injection used for fueling or heating magnetically confined, controlled-fusion experimental plasmas can also provide diagnostic measurements of the plasmas. The attenuation of an atomic beam (mainly from charge-exchange and ionization interactions) when passing through a plasma gives the plasma line density. Orthogonal arrays of highly collimated detectors of the secondary-electron-emission type have been used in magnetic-mirror experiments to measure neutral-beam attenuation along chords through the plasma volume at different radial and axial positions. The radial array is used to infer the radial plasma-density profile; the axial array, to infer the axial plasma-density profile and the ion angular distribution at the plasma midplane.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6772966
• Report Number(s): UCID-19422; ON: DE82021120; TRN: 82-023263
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATOMIC BEAMS
PLASMA DIAGNOSTICS
TMX DEVICES
ATTENUATION
CHARGE EXCHANGE
DEUTERIUM
IONIZATION
PLASMA DENSITY
SECONDARY EMISSION DETECTORS
BEAMS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC MIRRORS
MEASURING INSTRUMENTS
NUCLEI
ODD-ODD NUCLEI
OPEN PLASMA DEVICES
RADIATION DETECTORS
STABLE ISOTOPES
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics