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Energy and temperature dependences of ion-induced electron emission from polycrystalline graphite

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
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.nimb.2010.12.030DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S0168583X10009638PublisherUNSPECIFIED
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).
Funders:
Funding AgencyGrant Number
Ministry of Education and Science of the Russian Federation02.740.11.0389
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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