High dynamic range isotope ratio measurements using an analog electron multiplier

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F13%3A00387686" target="_blank" >RIV/67985882:_____/13:00387686 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1002/sia.5048" target="_blank" >http://dx.doi.org/10.1002/sia.5048</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/sia.5048" target="_blank" >10.1002/sia.5048</a>

Result language

angličtina

Original language name

High dynamic range isotope ratio measurements using an analog electron multiplier

Original language description

We have explored measurement and accuracy issues in the use of an electron multiplier (EM) detector as a fast analog amplifier rather than in pulse-counting mode. EM on a Cameca IMS 3f instrument was modified to allow both analog and digital signals to be recorded simultaneously. The digital signal was picked up on the last dynode and the analog signal was recorded at the anode (operated near ground potential). The digital signal was differentiated to convert the positive pulse at the last dynode to a negative-going signal that could be processed by the digital electronics of the IMS 3f and fed into the pulse counting system. The analog signal was amplified by an operational amplifier with a 106 ohm feedback resistor and the resulting signal was fed into the voltage/frequency convertor that normally processes the electrometer output from the Faraday cup collector. Isotope ratio measurements were explored for negative ion signals of the silicon and sulfur isotopes under Cs+ primary ion

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

<a href="/en/project/ME%20894" target="_blank" >ME 894: High dynamic range micro-Faraday array detector for multicollector isotopic SIMS</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2013

Confidentiality

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

Name of the periodical

Surface and Interface Analysis

ISSN

0142-2421

e-ISSN

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Volume of the periodical

45

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

4

Pages from-to

549-552

UT code for WoS article

000319048700140

EID of the result in the Scopus database

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