Ion-induced electron emission monitoring of the structure and morphology evolution in HOPG

被引：5

作者：

Andrianova, N. N. ^{[1
]}

Borisov, A. M. ^{[1
]}

Mashkova, E. S. ^{[1
]}

Parilis, E. S. ^{[2
]}

Virgiliev, Yu. S. ^{[3
]}

机构：

[1] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119991, Russia

[2] CALTECH, Pasadena, CA 91125 USA

[3] NIIgraphite, Moscow 111141, Russia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2009年 / 267卷 / 16期

关键词：

High-fluence ion irradiation; Ion-induced electron emission; Radiation damage in carbon-based materials; CARBON-BASED MATERIALS; RADIATION-DAMAGE; GRAPHITE;

D O I：

10.1016/j.nimb.2009.05.022

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The temperature dependences of the ion-induced electron emission yield gamma of highly-oriented pyrolytic graphite (HOPG) under high-fluence (10(18)-10(19) ions/cm(2)) 30 keV Ar+ ion irradiation at ion incidence angles from theta = 0 degrees (normal incidence) to 80 degrees have been measured to trace both the structure and morphology changes in the basal oriented samples. The target temperature has been varied during continuous irradiation from T = -180 to 400 degrees C. The surface analysis has been performed by the RHEED and SEM techniques. The surface microgeometry was studied using laser goniophotometry (LGF). The dependences of gamma(T) were found to be strongly non-monotonic and essentially different from the ones for Ar+ and N-2(+) ion irradiation of the polygranular graphites. A sharp peak at irradiation temperature T-p approximate to 150 degrees C was found. A strong influence of electron transport anisotropy has been observed, and ion-induced microgeometry is discussed. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2761 / 2764

页数：4

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