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  • AIP Publishing  (2)
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  • AIP Publishing  (2)
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    Online Resource
    Online Resource
    Transition of predominant mechanism for the deviation of micro-gap dc gas breakdown character with electrode gap changing
    AIP Publishing ; 2019
    In:  AIP Advances Vol. 9, No. 2 ( 2019-02-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 9, No. 2 ( 2019-02-01)
    Abstract: This paper explores the predominant mechanisms for the deviation of micro-gap dc gas breakdown and the transition between different mechanisms as the electrode separation d changing under a pin-to-plate electrode configuration using 2d3v particle-in-cell simulation with Monte Carlo collisions. The deviated breakdown characteristic curves as a function of d or gas pressure p are investigated and both present a plateau region. Through researching the position of discharge path, it is found that a self-modulation effect manages to maintain the breakdown voltage at the minimum value defined by Paschen’s curve in a certain d or p range and forms the plateau. The ranges of d and p for the plateau are also established. Theoretical calculation on the secondary electron emission coefficient induced by ion-enhanced field and determined by a surface roughness factor confirms that the ion-enhanced field emission effect affects the breakdown voltage significantly when d is below a critical value. The smaller the surface roughness factor is, the smaller the critical d will be. Under this effect, the breakdown voltage is decreased with d decreasing (also referred to as an increasing left branch with d increasing). Conclusively, the deviation characters of micro-gap gas breakdown are controlled by different mechanisms at different d ranges. The predominant mechanism for the deviation is the self-modulation effect, serving as the main reason for the plateau region, at moderate d of several micrometers and will transit to the ion-enhanced field emission effect, which is responsible for the increasing left branch at smaller d.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.5079703
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2583909-3
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Bilayer liquid-filled compound microlens arrays: A way to compensate aberration
    AIP Publishing ; 2020
    In:  Journal of Applied Physics Vol. 128, No. 16 ( 2020-10-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 128, No. 16 ( 2020-10-28)
    Abstract: The compound liquid microlens arrays (MLAs) with complementary aberrations possess significant applications in integrated optics and optical imaging systems. We fabricate bilayer liquid-filled compound MLAs by three-dimensional printing, micro-nano imprinting, and microinjection. It is found that the focal length and spherical aberration of the bilayer MLAs are 0.7394 times and 0.728 times that of monolayer MLAs, respectively. The bilayer MLAs with flexible materials have great potential application in high spatial resolution bionic eye for drivable deformation and real-time monitoring.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/5.0019444
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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