What question did this study set out to answer?

To develop and evaluate broad beam sources of fast neutral molecules and atoms covering areas up to 0.8 m² while preventing transitions into steady-state vacuum arcs.

January 1, 2012Instruments and Experimental Techniques

Broad beam sources of fast molecules with segmented cold cathodes and emissive grids

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Authors

AMAlexander MetelMoscow State Technological University SGSergey N. GrigorievLomonosov Moscow State University YMYury A. MelnikMoscow State Technological University

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Implication

Experimental study demonstrates reliable broad-beam generation of fast molecules in large-area vacuum systems, indicating complete suppression of destructive arcs.

Key Points

To develop and evaluate broad beam sources of fast neutral molecules and atoms covering areas up to 0.8 m² while preventing transitions into steady-state vacuum arcs.
Generated fast neutral particles through charge exchange collisions between gas molecules and accelerated ions across potential drops up to 10 kV.
Used a glow discharge plasma emitter trapped electrostatically between a cold hollow cathode and an emissive grid.
Segmented the cathode and grid into isolated sections connected to power supplies via ballasting resistors with resistance R > U/I₀.
Maintained stable glow discharge operation at cathode circuit currents up to 10 A and acceleration voltages up to 10 kV.
Completely prevented transitions from glow discharges to steady-state vacuum arcs despite repeated microsecond breakdowns caused by dielectric film contamination on electrodes.

Cite This Study

Metel et al. (2012) studied this question.

synapsesocial.com/papers/6a09eff100274e073d45c7d7 https://doi.org/10.1134/s0020441211060170

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Implication

Experimental study demonstrates reliable broad-beam generation of fast molecules in large-area vacuum systems, indicating complete suppression of destructive arcs.

Broad beam sources of fast molecules with segmented cold cathodes and emissive grids

Discussion

Member takes

Implication

Key Points

Cite This Study

Broad beam sources of fast molecules with segmented cold cathodes and emissive grids

Discussion

Member takes

Implication

Key Points

Cite This Study

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