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Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control

The continuous phase plate (CPP) provides excellent beam smoothing and shaping impacts in the inertial confinement fusion application. However, due to the features of its dispersion, its surface gradient is frequently too large (>2 μm/cm) to process. When machining a large gradient surface with c...

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Detalles Bibliográficos
Autores principales: Xie, Lingbo, Tian, Ye, Shi, Feng, Zhou, Gang, Guo, Shuangpeng, Zhu, Zhe, Song, Ci, Tie, Guipeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9332714/
https://www.ncbi.nlm.nih.gov/pubmed/35893157
http://dx.doi.org/10.3390/mi13081159
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author Xie, Lingbo
Tian, Ye
Shi, Feng
Zhou, Gang
Guo, Shuangpeng
Zhu, Zhe
Song, Ci
Tie, Guipeng
author_facet Xie, Lingbo
Tian, Ye
Shi, Feng
Zhou, Gang
Guo, Shuangpeng
Zhu, Zhe
Song, Ci
Tie, Guipeng
author_sort Xie, Lingbo
collection PubMed
description The continuous phase plate (CPP) provides excellent beam smoothing and shaping impacts in the inertial confinement fusion application. However, due to the features of its dispersion, its surface gradient is frequently too large (>2 μm/cm) to process. When machining a large gradient surface with continuous ion beam figuring (IBF), the acceleration of the machine motion axis cannot fulfill the appropriate requirements, and the machining efficiency is further influenced by the unavoidable extra removal layer. The pulsed ion beam (PIB) discretizes the ion beam by incorporating frequency-domain parameters, resulting in a pulsed beam with a controlled pulse width and frequency and avoiding the extra removal layer. This research evaluates the processing convergence ability of IBF and PIB for the large gradient surface using simulation and experiment. The findings reveal that PIB offers obvious advantages under the same beam diameter. Compared with the convergence ratio (γ = 2.02) and residuals (RMS = 184.36 nm) of IBF, the residuals (RMS = 27.48 nm) of PIB are smaller, and the convergence ratio (γ = 8.47) is higher. This work demonstrates that PIB has better residual convergence in large gradient surface processing. It is expected to realize ion beam machining with a higher convergence ratio.
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spelling pubmed-93327142022-07-29 Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control Xie, Lingbo Tian, Ye Shi, Feng Zhou, Gang Guo, Shuangpeng Zhu, Zhe Song, Ci Tie, Guipeng Micromachines (Basel) Article The continuous phase plate (CPP) provides excellent beam smoothing and shaping impacts in the inertial confinement fusion application. However, due to the features of its dispersion, its surface gradient is frequently too large (>2 μm/cm) to process. When machining a large gradient surface with continuous ion beam figuring (IBF), the acceleration of the machine motion axis cannot fulfill the appropriate requirements, and the machining efficiency is further influenced by the unavoidable extra removal layer. The pulsed ion beam (PIB) discretizes the ion beam by incorporating frequency-domain parameters, resulting in a pulsed beam with a controlled pulse width and frequency and avoiding the extra removal layer. This research evaluates the processing convergence ability of IBF and PIB for the large gradient surface using simulation and experiment. The findings reveal that PIB offers obvious advantages under the same beam diameter. Compared with the convergence ratio (γ = 2.02) and residuals (RMS = 184.36 nm) of IBF, the residuals (RMS = 27.48 nm) of PIB are smaller, and the convergence ratio (γ = 8.47) is higher. This work demonstrates that PIB has better residual convergence in large gradient surface processing. It is expected to realize ion beam machining with a higher convergence ratio. MDPI 2022-07-22 /pmc/articles/PMC9332714/ /pubmed/35893157 http://dx.doi.org/10.3390/mi13081159 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xie, Lingbo
Tian, Ye
Shi, Feng
Zhou, Gang
Guo, Shuangpeng
Zhu, Zhe
Song, Ci
Tie, Guipeng
Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control
title Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control
title_full Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control
title_fullStr Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control
title_full_unstemmed Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control
title_short Figuring Method of High Convergence Ratio for Pulsed Ion Beams Based on Frequency-Domain Parameter Control
title_sort figuring method of high convergence ratio for pulsed ion beams based on frequency-domain parameter control
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9332714/
https://www.ncbi.nlm.nih.gov/pubmed/35893157
http://dx.doi.org/10.3390/mi13081159
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