Preparation

chamber

Experimental

chamber

Beam intensity

measurement MonochromatorPrefocus

mirror

Analyser

controller

Monochromator

controller & PC

Prefocus mirror

controller & PC

electron

analyser

X-ray

LEED

camera

ma

nip

ula

torm

an

ipu

lato

r

stepping motors

z z

θ

φ

motor controllers

Materials Science Beamline, Synchrotron Elettra, Trieste, Italy

System integration and automation by Jiří Libra (www.kolibrik.net)

Legend:

* only significant parts of system are shown

Bakeout controller

thermocouples

heating elements

PC for experiment control PC for beamline control

XC-BUS(RS485)

converter

BCS - Elettra's Beamline Control System(beamline/ring status, chamber pressures, etc.)

Analyzer

driver

NI/Labview

driver

USB driver

SpecsLab

KolXPDexperiment

automation

KolLEED

mesh current

Mesh current

watcher

Motor

Control

Pressure watcher

& exposure meter

gra

bb

er

ADC

driverAD

C

Kleopatramonochromator

control

Mesh current

monitor

& logger

data import

USB

CO

M

eth

eth

eth

BENDING

MAGNET

Electronics developed and built

by Jiří Libra

Software developed by Jiří Libra

Analog and power links

Communication links

Main features:

- automatic monochromator and

prefocus mirror control

- measurements with synchrotron radiation

(SRPES)

- automated angle-resolved experiments

(XPD, ARPES, ...)

- automated energy-resolved experiments

(RESPES, NEXAFS, XANES, ...)

COM

2011/06 Jiří Libra

Al2O3/Cu91Al9(111)2D angle-resolved spectra of core-levelsand valence band can be measured. All measured spectra can be automaticallyfitted and components of fit can be usedfor displaying a pattern.Valence band can be displayed as polaror azimuthal plot or as 2D map likeFermi surface map.

Cu 3s Al 2s (metal) Al 2s (oxide)

127 126 125 124 123 122 121 120 119 118 117 116

Binding Energy [eV]

oxide

metal

Cu 3sAl 2s

emitters

3

4

Sn/Pd(111) (2x2)

emitters

2

5

1

Layer 1 Layer 2 Layer 3 Layer 4 Layer 5

sum of contributions experiment

Watch video-tutorial at

http://www.kolibrik.net/kolxpd/

How to import 15 spectra, make graphs, fit

peaks and analyze results in 90 seconds !!!

Tutorial steps:

• start: 15 raw XY text files with sample spectra (2 doublets)

• import to KolXPD by single drag-and-drop

• place spectra to one graph, change x-axis to binding energy

• change display to waterfall and color-filled peak area

• define x-axis range and fitting function for middle spectrum

• automatically fit all spectra with this function

• display fit results

• export area evolution of doublets and display in new graph

• fit area evolution with linear function

All this done in 90 seconds!

Video snapshots:

software for photoelectron spectroscopydata measurement and processing

KolXPDKolXPD• Import and export of variety formats

• Huge amount of data handling

• Fitting, waterfall charts, quantitative preview

• Functionality customizable on request

FEATURE HIGHLIGHTS

• Focused to photoelectron spectroscopy

• Very fast data viewing and processing

• Energy- and angle-resolved experiments

Synchrotorn Elettra

Trieste, ItalyCharles University

in Prague, Czech RepublicAcademy of Sciences of the

Czech Republic, Prague

Heinrich-Heine-Universität Düsseldorf, Germany

Synchrotorn SPring-8Sayo, Japan

National Institute for Materials Science

Tsukuba, Japan

most significant institutes where KolXPD is used

1500

750

0

2250

5 4 3 2 1 0 -1

130

127.5

125

122.5

120

117.5

115

Binding Energy [eV]

h[e

V]

νInte

nsity [a

rb.u

.]

6789

3000

4000

2000

0

6000

5 4 3 2 1 0 -1130

127.5

125

122.5

120

117.5

115

Binding Energy V[e ]

h[e

V]

νInte

nsity [

arb

.u.]

6789

8000

hν = 124.8eV, EB = 4eV hν = 121.4eV, EB = 1.8eV

Angle- and energy-resolved photoemission experimentsacquired using KolXPD at Materials Science Beamline, synchrotron Elettra

Angle-resolved photoemission experimentsacquired using KolXPD at Charles University in Prague

Reference papers and results where KolXPD was used for measurement and data processing

• J. Libra, V. Matolín, Surf. Sci. 600 (2006) 2317Angle resolved photoemission study of the Ce/Pd(111) interface

• J. Libra, et al., Phys. Rev. B 76 (2007) 165438Angle-resolved photoemission study of ordered Pb/Ni(111) surface phases

• V. Matolín, J. Libra, Surf. Sci. 601 (2007) 4058–4062Fermi surface and band mapping of the cerium/palladium surface alloy

• M. Škoda, J. Libra, et al., Surface Science 601 (2007) 4958A resonant photoemission study of the Ce and Ce-oxide/Pd(111) interfaces

• V. Matolín, J. Libra, et al., J. Phys. Chem. C 112 (2008) 3751Photoemission spectroscopy study of Cu/CeO2 systems:

Cu/CeO2 nanosized catalyst and CeO2(111)/Cu(111) inverse model catalyst

About author

Mgr. Jiří Libra, Ph.D. (email: Jiri.Libra@gmail.com)

• Surface science experienced during 10 years spent in Department of

Surface and Plasma Science at Faculty of Mathematics and Physics,

Charles University in Prague under supervision of prof. Vladimír Matolín

• Business activities: development of software and electronics (not only) for

science. Experiment automation, data acquisition and processing,

electronics for angle-resolved experiments, software for beamline

monochromator control, scientific device interfacing, etc.

KolXPD Web

http://www.kolibrik.net/kolxpd/

• You can download KolXPD and track new versions, download

documents, manuals, tutorials and this poster

• Purchase a license or make a donation, get a trial license for evaluation

• Contact author, visit KolXPD forum, discuss with other KolXPD users

Fermi surface map Valence band polar scan

XPD pattern calculations made by EDAC*patterns and clusters can be vizualized by KolXPD

*Software for X-ray photoelectron diffraction (XPD) pattern calculations F. J. García de Abajo, M. A. Van Hove, and C. S. Fadley, Phys. Rev. B 63, 075404 2001.

KolXPD can control both manipulator and monochromator – energy-resolved experiments like NEXAFS, resonantphotoemission, etc. are possible. Graphs below show resonant experiment on cerium-oxide and XPD patternsacquired at two different resonant photon energies.