Details
| Original language | English |
|---|---|
| Pages (from-to) | 4911-4915 |
| Number of pages | 5 |
| Journal | Review of Scientific Instruments |
| Volume | 75 |
| Issue number | 11 |
| Publication status | Published - 2 Nov 2004 |
Abstract
Spot profile analysis low energy electron diffraction (SPA-LEED) is one of the most versatile and powerful methods for the determination of the structure and morphology of surfaces even at elevated temperatures. In setups where the sample is heated directly by an electric current, the resolution of the diffraction images at higher temperatures can be heavily degraded due to the inhomogeneous electric and magnetic fields around the sample. Here we present an easily applicable modification of the common data acquisition hardware of the SPA-LEED, which enables the system to work in a pulsed heating mode: Instead of heating the sample with a constant current, a square wave is used and electron counting is only performed when the current through the sample vanishes. Thus, undistorted diffration images can be acquired at high temperatures.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
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In: Review of Scientific Instruments, Vol. 75, No. 11, 02.11.2004, p. 4911-4915.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Chopped sample heating for quantitative profile analysis of low energy electron diffraction spots at high temperatures
AU - Kury, P.
AU - Zahl, P.
AU - Horn-von Hoegen, M.
AU - Voges, C.
AU - Frischat, H.
AU - Günter, H. L.
AU - Pfnür, Herbert
AU - Henzler, Martin
PY - 2004/11/2
Y1 - 2004/11/2
N2 - Spot profile analysis low energy electron diffraction (SPA-LEED) is one of the most versatile and powerful methods for the determination of the structure and morphology of surfaces even at elevated temperatures. In setups where the sample is heated directly by an electric current, the resolution of the diffraction images at higher temperatures can be heavily degraded due to the inhomogeneous electric and magnetic fields around the sample. Here we present an easily applicable modification of the common data acquisition hardware of the SPA-LEED, which enables the system to work in a pulsed heating mode: Instead of heating the sample with a constant current, a square wave is used and electron counting is only performed when the current through the sample vanishes. Thus, undistorted diffration images can be acquired at high temperatures.
AB - Spot profile analysis low energy electron diffraction (SPA-LEED) is one of the most versatile and powerful methods for the determination of the structure and morphology of surfaces even at elevated temperatures. In setups where the sample is heated directly by an electric current, the resolution of the diffraction images at higher temperatures can be heavily degraded due to the inhomogeneous electric and magnetic fields around the sample. Here we present an easily applicable modification of the common data acquisition hardware of the SPA-LEED, which enables the system to work in a pulsed heating mode: Instead of heating the sample with a constant current, a square wave is used and electron counting is only performed when the current through the sample vanishes. Thus, undistorted diffration images can be acquired at high temperatures.
UR - http://www.scopus.com/inward/record.url?scp=10844288663&partnerID=8YFLogxK
U2 - 10.1063/1.1807003
DO - 10.1063/1.1807003
M3 - Article
AN - SCOPUS:10844288663
VL - 75
SP - 4911
EP - 4915
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 11
ER -