Discharging dynamics of insulator surfaces irradiated by highly charged ions

Bundaleski, Nenad; Khemliche, H.; Rousseau, Patrick; Cassimi, A.; Maunoury, L.; Roncin, P.

doi:10.1088/1742-6596/163/1/012091

Cited by 6 publications

(6 citation statements)

References 11 publications

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“…Therefore, guiding can be tuned by only moderate temperature variations near room temperature as first proposed in [34]. We demonstrate that increasing the temperature of a glass capillary and, therefore, its conductivity leads to a reduction of guiding and, eventually, to a complete disappearance of the guiding effect.…”

Section: Introductionmentioning

confidence: 53%

Temperature control of ion guiding through insulating capillaries

et al. 2012

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Guiding of highly charged ions through tilted capillaries promises to develop into a tool to efficiently collimate and focus low-energy ion beams to sub-micrometer spot size. One control parameter to optimize guiding is the residual electrical conductivity of the insulating material. Its strong, nearly exponential temperature dependence is the key to transmission control and can be used to suppress transmission instabilities arising from flux fluctuations of incident ions which otherwise would lead to Coulomb blocking of the capillary. We demonstrate the strong dependence of transmission of Ar 7+ ions through a single macroscopic glass capillary on temperature and ion flux. Results in the regime of dynamical equilibrium can be described by balance equations in the linear-response regime.

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Section: Introductionmentioning

confidence: 53%

Temperature control of ion guiding through insulating capillaries

et al. 2012

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“…This quantity is plotted as a function of the electronic energy loss in Fig. 9 charging (and decharging) dynamics of various insulators irradiated with slow-ion beams, using an original method based on beam deflection under grazing incidence [25].…”

Section: Influence Of Electronic Energy Loss and Target Materialsmentioning

confidence: 99%

Charging of insulators by multiply-charged-ion impact probed by slowing down of fast binary-encounter electrons

et al. 2010

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The interaction of ion beams with insulators leads to charging-up phenomena, which at present are under investigation in connection with guiding phenomena in nanocapillaries with possible application in nanofocused beams. We studied the charging dynamics of insulating foil targets [Mylar, polypropylene (PP)] irradiated with swift ion beams (C, O, Ag, and Xe at 40, 23, 40, and 30 MeV/u, respectively) via the measurement of the slowing down of fast binary-encounter electrons. Also, sandwich targets (Mylar covered with a thin Au layer on both surfaces) and Mylar with Au on only one surface were used. Fast-electron spectra were measured by the time-of-flight method at the superconducting cyclotron of Laboratori Nazionali del Sud (LNS) Catania. The charge buildup leads to target-material-dependent potentials of the order of 6.0 kV for Mylar and 2.8 kV for PP. The sandwich targets, surprisingly, show the same behavior as the insulating targets, whereas a single Au layer on the electron and ion exit side strongly suppresses the charging phenomenon. The accumulated number of projectiles needed for charging up is inversely proportional to electronic energy loss. Thus, the charging up is directly related to emission of secondary electrons.

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“…In this letter we show that a key control parameter for guiding is the small residual electric conductivity of the highly insulating capillary material whose dependence of temperature σ(T ) is nearly exponential [32]. Therefore, guiding can be tuned by moderate temperature variation near room temperature as proposed in [33]. We demonstrate that increasing the temperature of a glass capillary and therefore its conductivity leads to a reduction of guiding and, eventually, to a complete disappearance of the guiding effect.…”

mentioning

confidence: 74%

Temperature Control of Ion Guiding Through Insulating Capillaries

Kowarik¹,

Bereczky²,

Ladinig³

et al. 2011

Preprint

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Guiding of highly charged ions (HCI) through tilted capillaries promises to develop into a tool to efficiently collimate and focus low-energy ion beams to sub-micrometer size. One control parameter to optimize guiding is the residual electrical conductivity of the insulating material. Its strong (nearly exponential) temperature dependence is the key to transmission control and can be used to suppress transmission instabilities arising from large flux fluctuations of incident ions which otherwise would lead to Coulomb blocking of the capillary.We demonstrate the strong dependence of transmission of Ar 9+ ions through a single macroscopic glass capillary on temperature and ion flux. Results in the regime of dynamical equilibrium can be described by balance equations in the linear-response regime.

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Discharging dynamics of insulator surfaces irradiated by highly charged ions

Cited by 6 publications

References 11 publications

Temperature control of ion guiding through insulating capillaries

Temperature control of ion guiding through insulating capillaries

Charging of insulators by multiply-charged-ion impact probed by slowing down of fast binary-encounter electrons

Temperature Control of Ion Guiding Through Insulating Capillaries

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