Collisions of low-energy Ar+, N-2(+), and D-2(+) ions with room-temperature and heated surfaces of mixed beryllium-tungsten thin films of different composition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F14%3A00506908" target="_blank" >RIV/61388955:_____/14:00506908 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0298044" target="_blank" >http://hdl.handle.net/11104/0298044</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijms.2014.02.013" target="_blank" >10.1016/j.ijms.2014.02.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Collisions of low-energy Ar+, N-2(+), and D-2(+) ions with room-temperature and heated surfaces of mixed beryllium-tungsten thin films of different composition

Popis výsledku v původním jazyce

Collisions of Ar+, N-2(+), and D-2(+) ions of incident energies 20-100 eV with thin mixed beryllium-tungsten films of different composition (BeW(90:10), BeW(50:50), BeWO(60:22:11)) and different temperatures of the samples (room temperature, 150 degrees C, 300 degrees C) were investigated using a tandem mass spectrometer system. Mass spectra of product ions arising from Ar+ collisions with the three samples showed sputtering of the basic material of the sample substrate (Be+, BeH+, BeOH+, Li+, Na+, K+) and of hydrocarbon ions from the hydrocarbon coverage of the sample that decreased with increasing temperature. Sputtering of W+ or its compounds could not be detected. Normalized relative ion yields of Be+ and its compounds were not proportional to the Be content in the sample. Mass spectra from N-2(+) collisions were very similar to those of Ar+. Surface-induced dissociation of N-2(+) to N+ was not detected. The most conspicuous difference between mass spectra from D-2(+) impact and from Ar+ impact was a much lower sputtering efficiency of D-2(+) (by a factor of 50-100 or, for alkali ions, even more). The relative ion yield of Be+ strongly increased when the temperature of the sample was raised to 400 degrees C and 450 degrees C. A surface chemical reaction between the incident D-2(+) and surface Be leading to BeD+ was observed. The data may be of interest as basic information relevant to plasma-wall interactions in fusion devices. (C) 2014 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Collisions of low-energy Ar+, N-2(+), and D-2(+) ions with room-temperature and heated surfaces of mixed beryllium-tungsten thin films of different composition

Popis výsledku anglicky

Collisions of Ar+, N-2(+), and D-2(+) ions of incident energies 20-100 eV with thin mixed beryllium-tungsten films of different composition (BeW(90:10), BeW(50:50), BeWO(60:22:11)) and different temperatures of the samples (room temperature, 150 degrees C, 300 degrees C) were investigated using a tandem mass spectrometer system. Mass spectra of product ions arising from Ar+ collisions with the three samples showed sputtering of the basic material of the sample substrate (Be+, BeH+, BeOH+, Li+, Na+, K+) and of hydrocarbon ions from the hydrocarbon coverage of the sample that decreased with increasing temperature. Sputtering of W+ or its compounds could not be detected. Normalized relative ion yields of Be+ and its compounds were not proportional to the Be content in the sample. Mass spectra from N-2(+) collisions were very similar to those of Ar+. Surface-induced dissociation of N-2(+) to N+ was not detected. The most conspicuous difference between mass spectra from D-2(+) impact and from Ar+ impact was a much lower sputtering efficiency of D-2(+) (by a factor of 50-100 or, for alkali ions, even more). The relative ion yield of Be+ strongly increased when the temperature of the sample was raised to 400 degrees C and 450 degrees C. A surface chemical reaction between the incident D-2(+) and surface Be leading to BeD+ was observed. The data may be of interest as basic information relevant to plasma-wall interactions in fusion devices. (C) 2014 Elsevier B.V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Mass Spectrometry

ISSN

1387-3806

e-ISSN

—

Svazek periodika

365

Číslo periodika v rámci svazku

MAY 2014

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

316-323

Kód UT WoS článku

000338622200050

EID výsledku v databázi Scopus

2-s2.0-84901939691