Collision and Diffusion in Microwave Breakdown of Nitrogen Gas in and around Microgaps
AIP Advances, Vol. 4, no. 1, 017119, (2014) The microwave induced breakdown of N2 gas in microgaps was modeled using the collision frequency between electrons and neutral molecules and the effective electric field concept. Low pressure breakdown at the threshold electric field occurs outside the gap...
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| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
29-11-2013
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | AIP Advances, Vol. 4, no. 1, 017119, (2014) The microwave induced breakdown of N2 gas in microgaps was modeled using the
collision frequency between electrons and neutral molecules and the effective
electric field concept. Low pressure breakdown at the threshold electric field
occurs outside the gap, but at high pressures it is found to occur inside the
microgap with a large threshold breakdown electric field corresponding to a
very large electron oscillation amplitude. Three distinct pressure regimes are
apparent in the microgap breakdown: a low pressure multipactor branch, a
mid-pressure Paschen branch, both of which occur in the space outside the
microgap, and a high pressure diffusion-drift branch, which occurs inside the
microgap. The Paschen and diffusion-drift branches are divided by a sharp
transition and each separately fits the collision frequency model. There is
evidence that considerable electron loss to the microgap faces accompanies the
diffusion-drift branch in microgaps. |
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| DOI: | 10.48550/arxiv.1308.2205 |