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Areal density effects on the blocking of 3-keV Ne^{7+} ions guided through nanocapillaries in polymers

Stolterfoht, N. and Hellhammer, R. and Sulik, B. and Juhász, Z. and Bayer, V. and Trautmann, C. and Bodewits, E. and Reitsma, G. and Hoekstra, R. (2013):
Areal density effects on the blocking of 3-keV Ne^{7+} ions guided through nanocapillaries in polymers.
88, In: Physical Review A, (3), pp. 032902. American Physical Society, ISSN 1050-2947,
[Article]

Abstract

We studied blocking effects on ion guiding through nanocapillaries in highly insulating polyethylene terephthalate (PET). The experiments were initiated in view of a previous study with capillaries in polycarbonate (PC) for which strong blocking effects were observed, whereas for PET these effects could not be detected. The aim was to find out whether the different results are caused by differences in the PET and PC materials or by differences in the areal densities of the capillaries. Transmission experiments of 3-keV Ne7+ ions were performed for a variety of PET samples with an areal capillary density ranging from 3 to 60×106 cm−2. The tilt angles were close to zero degree because previous blocking effects were found to be largest at small angles. Our results clearly show that blocking effects also exist for PET and that they are sensitively dependent on the areal capillary density, i.e., the mean capillary distance. The potential produced by the charges accumulated in neighboring capillaries is calculated showing that it plays an important role in the ion blocking. In addition, model calculations are performed providing expressions to determine the direct ion transmission for small tilt angles and divergent ion beams.

Item Type: Article
Erschienen: 2013
Creators: Stolterfoht, N. and Hellhammer, R. and Sulik, B. and Juhász, Z. and Bayer, V. and Trautmann, C. and Bodewits, E. and Reitsma, G. and Hoekstra, R.
Title: Areal density effects on the blocking of 3-keV Ne^{7+} ions guided through nanocapillaries in polymers
Language: English
Abstract:

We studied blocking effects on ion guiding through nanocapillaries in highly insulating polyethylene terephthalate (PET). The experiments were initiated in view of a previous study with capillaries in polycarbonate (PC) for which strong blocking effects were observed, whereas for PET these effects could not be detected. The aim was to find out whether the different results are caused by differences in the PET and PC materials or by differences in the areal densities of the capillaries. Transmission experiments of 3-keV Ne7+ ions were performed for a variety of PET samples with an areal capillary density ranging from 3 to 60×106 cm−2. The tilt angles were close to zero degree because previous blocking effects were found to be largest at small angles. Our results clearly show that blocking effects also exist for PET and that they are sensitively dependent on the areal capillary density, i.e., the mean capillary distance. The potential produced by the charges accumulated in neighboring capillaries is calculated showing that it plays an important role in the ion blocking. In addition, model calculations are performed providing expressions to determine the direct ion transmission for small tilt angles and divergent ion beams.

Journal or Publication Title: Physical Review A
Volume: 88
Number: 3
Publisher: American Physical Society
Uncontrolled Keywords: Channeling phenomena, Electronic excitation and ionization of atoms, Photoionization of atoms and ions
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 03 Apr 2014 09:22
Official URL: http://dx.doi.org/10.1103/PhysRevA.88.032902
Identification Number: doi:10.1103/PhysRevA.88.032902
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