Avilkina, V. S. and Andrianova, N. N. and Borisov, A. M. and Mashkova, E. S. and Parilis, E. S. (2011) Energy and temperature dependences of ion-induced electron emission from polycrystalline graphite. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 269 (9). pp. 995-998. ISSN 0168-583X. https://resolver.caltech.edu/CaltechAUTHORS:20110524-105410303
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Abstract
The dependences of the yield γ of ion-induced kinetic electron emission from polycrystalline graphite on ion energy E were measured under high-fluence Ar^+ and N^+_2 ion irradiation in energy range 6–30 keV from room temperature to 400 °C. It has been observed that the step-like pattern of temperature dependence γ(T) at the dynamic radiation damage annealing temperature T_a is gradually transformed with decreasing ion energy until γ virtually ceases to depend on temperature. The experimentally obtained energy dependence of the ratio γ(T > T_a)/γ(T < T_a) has been analyzed using the theory of ion-induced kinetic electron emission. Some threshold values of the level of radiation damage v_d measured in dpa under steady state of high-fluence Ar^+ and N^+_2 irradiation have been found. When v becomes less than a threshold value v_d, the graphite lattice is virtually not disordered. It has been found that v_d for Ar^+ ions is greater than v_d for N^+_2 ions.
| Item Type: | Article | |||||||||
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| Additional Information: | © 2010 Elsevier B.V. Received 28 July 2010. Received in revised form 6 December 2010. Available online 15 December 2010. This work is supported by the Ministry of Education and Science of the Russian Federation (Contract No. 02.740.11.0389). | |||||||||
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| Subject Keywords: | High-fluence ion irradiation; Ion-induced electron emission; Radiation damage in carbon-based materials | |||||||||
| Issue or Number: | 9 | |||||||||
| Record Number: | CaltechAUTHORS:20110524-105410303 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20110524-105410303 | |||||||||
| Official Citation: | V.S. Avilkina, N.N. Andrianova, A.M. Borisov, E.S. Mashkova, E.S. Parilis, Energy and temperature dependences of ion-induced electron emission from polycrystalline graphite, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 269, Issue 9, Atomic Collisions in Solids - Proceedings of the 24th International Conference on Atomic Collisions in Solids (ICACS-24), 1 May 2011, Pages 995-998, ISSN 0168-583X, DOI: 10.1016/j.nimb.2010.12.030. (http://www.sciencedirect.com/science/article/pii/S0168583X10009638) | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 23780 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 27 May 2011 18:18 | |||||||||
| Last Modified: | 03 Oct 2019 02:49 |
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