Neutral beam

Fig. 2. A magnetooptical player (2). P = polarizer MC = magnetic coil (for magnetooptical writing) NBS = neutral beam spHtter PBS = polarizing beam...

TiC coating on graphite for limiters and neutral beam armor. 

The SsO ion was then mass selected and neutralized by electron exchange with Xe atoms. The neutral beam was reionized by collision with O2 and the... 

Neutral species are best sampled using molecular beam methods in which the neutral beam is modulated between the sampling orifice and the ionization chamber of the mass spectrometer and only the modulated component of the mass spectrometer output is recorded. This approach enables all neutral species, including radicals to be detected with a comparable sensitivity. If modulation techniques are not used, the sensitivity for detecting condensible or reactive species is much less than for non-condensible, non-reactive neutral molecules because of the much larger effective pumping speed for the former in the mass spectrometer chamber. However, the ease of installation of non-line-of-sight non-modulated... 

LSIMS is nearly identical to FAB except tliat the primary particle beam is an ion beam, usually cesium ions, rather than a neutral beam. Tlie ions can be focused and accelerated to higher kinetic energies than are possible for neutral beams, and sensitivity is improved for higher masses. 

Seventl candidate heating schemes, including plasma compression, the induction of moderate mrbulencc, the absorption of high-power oscillations al various characteristic frequencies, and healing to neutral beam injection—all have been subjected to research. 

H2+(Jf2S,+ ) F ranck-Condon distribution Crossed ion-neutral beams electron-impact ionization... 

Collision region. The neutral reactant can be introduced into the collision region in the form of a neutral beam, having well-defined velocity and orientation (e.g., produced by a nozzle), or neutrals may be admitted to a collision chamber, where their orientation is random and the velocity is characterized by a Boltzmann distribution. 

Figure 5. Schematic diagram of crossed ion-neutral beam apparatus.53...

The emission of molecular ions in organic SIMS is discussed with respect to the method of ionization and the various sample preparation and matrix-assisted procedures used. The matrices include various solid-state and liquid matrices such as ammonium chloride, charcoal, glycerol, and galliun. A neutral beam source is described to analyze thick insulating films. Various chemical derivatization procedures have been developed to enhance the sensitivity of molecular SIMS and to selectively detect components in mixtures. 

To overcome this problem, we have modified a commercial ion gun to generate a diffuse fast-atom beam [116, 117]. The ion beam neutralizer shown in Figure 7 consists of a multi-hole metal plate through which the primary ions pass. The ions are neutralized by the ion/surface interactions that occur as the beam passes through the metal aperatures and by charge-exchange reactions that occur within the gun assembly. A repeller grid is used to remove the residual ions from the neutralized beam. 

A) Use of neutral beams the charging is reduced from the case of positive primary ions... 

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