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Recovery of release cloud from laser shock-loaded graphite and hydrocarbon targets : in search of diamonds
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(2022) Recovery of release cloud from laser shock-loaded graphite and hydrocarbon targets : in search of diamonds. Journal of Physics D: Applied Physics, 56 (2). 025301. doi:10.1088/1361-6463/ac99e8 ISSN 0022-3727.
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Official URL: http://doi.org/10.1088/1361-6463/ac99e8
Abstract
This work presents first insights into the dynamics of free-surface release clouds from dynamically compressed polystyrene and pyrolytic graphite at pressures up to 200 GPa, where they transform into diamond or lonsdaleite, respectively. These ejecta clouds are released into either vacuum or various types of catcher systems, and are monitored with high-speed recordings (frame rates up to 10 MHz). Molecular dynamics simulations are used to give insights to the rate of diamond preservation throughout the free expansion and the catcher impact process, highlighting the challenges of diamond retrieval. Raman spectroscopy data show graphitic signatures on a catcher plate confirming that the shock-compressed PS is transformed. First electron microscopy analyses of solid catcher plates yield an outstanding number of different spherical-like objects in the size range between ten(s) up to hundreds of nanometres, which are one type of two potential diamond candidates identified. The origin of some objects can unambiguously be assigned, while the history of others remains speculative.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QC Physics T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Library of Congress Subject Headings (LCSH): | Plasma (Ionized gases), Nanodiamonds -- Electric properties, Nuclear physics, Lasers -- Industrial applications, Energy level densities, Plasma density, Laser-plasma interactions, Plasma astrophysics | ||||||
Journal or Publication Title: | Journal of Physics D: Applied Physics | ||||||
Publisher: | IOP Publishing | ||||||
ISSN: | 0022-3727 | ||||||
Official Date: | 9 December 2022 | ||||||
Dates: |
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Volume: | 56 | ||||||
Number: | 2 | ||||||
Article Number: | 025301 | ||||||
DOI: | 10.1088/1361-6463/ac99e8 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 1 March 2023 | ||||||
Date of first compliant Open Access: | 1 March 2023 | ||||||
RIOXX Funder/Project Grant: |
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