Secondary electron emission characteristics of 3D-printed ceramic insulators with functionally graded lattice structures

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-03-24 DOI:10.1063/5.0256365

Chao Wang, Yu-Long Yang, Xin-Ru Shi, Wen-Dong Li, Guang-Yu Sun, Si-Le Chen, Song-Lin Ran, Guan-Jun Zhang, Zhao-Quan Chen

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引用次数: 0

Abstract

The presence of a macroscopic interface between ceramic insulators and vacuum inevitably leads to multipactor under high electric fields, which is a significant threat to various electronic and electrical devices, as it is typically regarded as a precursor to electrical breakdown. In this study, we report a strategy using functionally graded lattice structures (FGLS) to manipulate the multipactor of the ceramic surface. First, particle-in-cell simulations were conducted to study the secondary electron avalanche process. Simulation results indicated that the interaction between electrons and FGLS hinders the development of secondary electron avalanche. Also, a few positive charges can be accumulated on the ceramic surface since FGLS eliminates the macroscopic interface between insulators and vacuum. Subsequently, stereolithography 3D printing technology was adopted to fabricate ceramic insulators with FGLS, and a further experimental characterization verifies the reduction of secondary electron yield, especially for surfaces with finer structures.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.