Extraction of negative hydrogen ions produced with aluminum plasma grid

Charging of dust grains in a plasma with negative ions

The effect of negative ions on the charging of dust particles in a plasma is investigated experimentally. A plasma containing a very low percentage of electrons is formed in a single-ended Q machine when SF6 is admitted into the vacuum system. The relatively cold Q machine electrons Te 0.2 eV readily attach to SF6 molecules to form SF6 − negative ions. Calculations of the dust charge indicate t...

On geometric focusing of hydrogen negative ions in the surface-plasma sources

2014 A detailed analysis of the efficiency of geometric focusing in surface-plasma sources is presented. Revue Phys. Appl. 23 (1988) 1885-1888 DÉCEMBRE 1988,

Lower-hybrid waves in a plasma with negative ions

The introduction of an electronegative gas (i.e., a gas with a large electron attachment cross section, e.g., SF6) into a plasma has made it possible to study plasmas in which the negative ion density can be much larger than the electron density. lp2 In such a plasma, new phenomena may be expected to occur, in particular, various electrostatic wave modes are modified by the presence of negative...

Plume Splitting and Sharpening in Laser-Produced Aluminum Plasma

Characteristics of Ions Emission from Ultrashort Laser Produced Plasma

The dynamic characteristics of the ions emitted from ultrashort laser interaction with materials were studied. A series of successive experiments were conducted for six different elements (C, Al, Cu, Mo, Gd, and W) using 40 fs, 800 nm Ti: Sapphire laser. Time-of-flight (TOF) ion profile was analyzed and charge emission dependencies were investigated. The effects of incident laser interaction wi...