Surface charging of thick porous water ice layers relevant for ion sputtering experiments

Galli, André; Vorburger, Audrey Helena; Pommerol, Antoine; Wurz, Peter; Jost, Bernhard; Poch, Olivier; Brouet, Yann; Tulej, Marek; Thomas, Nicolas (2016). Surface charging of thick porous water ice layers relevant for ion sputtering experiments. Planetary and space science, 126, pp. 63-71. Elsevier 10.1016/j.pss.2016.03.016

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We use a laboratory facility to study the sputtering properties of centimeter-thick porous water ice subjected to the bombardment of ions and electrons to better understand the formation of exospheres of the icy moons of Jupiter. Our ice samples are as similar as possible to the expected moon surfaces but surface charging of the samples during ion irradiation may distort the experimental results. We therefore monitor the time scales for charging and discharging of the samples when subjected to a beam of ions. These experiments allow us to derive an electric conductivity of deep porous ice layers. The results imply that electron irradiation and sputtering play a non-negligible role for certain plasma conditions at the icy moons of Jupiter. The observed ion sputtering yields from our ice-samples are similar to previous experiments where compact ice films were sputtered off a micro-balance. (C) 2016 Elsevier Ltd. All rights reserved.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute

UniBE Contributor:

Galli, André; Vorburger, Audrey Helena; Pommerol, Antoine; Wurz, Peter; Jost, Bernhard; Poch, Olivier; Brouet, Yann; Tulej, Marek and Thomas, Nicolas

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

0032-0633

Publisher:

Elsevier

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

28 Oct 2016 15:06

Last Modified:

01 Aug 2018 02:30

Publisher DOI:

10.1016/j.pss.2016.03.016

BORIS DOI:

10.7892/boris.89509

URI:

https://boris.unibe.ch/id/eprint/89509

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