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Ion guiding through capillaries in uncoated Al2O3 membranes |
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| Authors: | F.Y. Xi H.P. Liu X.M. Chen |
| Affiliation: | a Lanzhou University, Lan Zhou, China b School of National Defence Science and Technology, Southwest University of Science and Technology, MianYang City, Sichuan Province 621010, China c Institute of Modern Physics, Chinese Academy of Science, Lan Zhou, China |
| Abstract: | We made an experimental study on ion guiding through capillaries in uncoated Al2O3 membranes using a variety of ions such as O1+, O3+, and O6+. The incident energy was varied within the range of 30-150 keV. The results were compared with others using coated PET and Al2O3 capillary membranes as well as with the so-called scaling law discovered by Stolterfoht and his co-workers. Good agreement of our results with the scaling law was found. However, our membranes showed extraordinarily strong guiding ability. The reason lies in that our membranes were uncoated. A slower charge drift speed along the insulating capillary wall and a much larger equilibrium charge Q∞ seems to exist in our experiment. |
| Keywords: | Ion guiding Capillaries Uncoated Al2O3 membranes |
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