Spectrometer
●
for electrons: U
0
= - 895.5 V
●
for ions: U
0
= + 895.5 V
3.6 Work Function
The basic energetic properties are shown in figure 20 for the example of the measure-
ment of photoelectrons.
Figure 20: Energy Scheme – Photoelectron Spectroscopy
The spectrometer and the sample are connected to ensure that the Fermi-energies are
at the same reference level. The binding energy of the electrons is given by
E
bin
=
h
−
E
kin
−
W f
sample
(25)
The energy E
′
kin
(see figure 20) is measured by the spectrometer and after calibrating
the work function of the spectrometer, the binding energy of the sample relative to the
Fermi level can be measured without knowing its work function because
E
kin
W f
sample
=
E '
kin
W f
spectr
(26)
Typical values of the analyzer work function are between 4 eV and 5 eV. The compensa-
tion is performed by addition through the software (see SpecsLab software manual).
For fine adjustment, use UPS mode measurement. Please check the analyzer settings in
34
Summary of Contents for PHOIBOS 100
Page 1: ...PHOIBOS Hemispherical Energy Analyzer Series PHOIBOS 100 PHOIBOS 150 3 1...
Page 6: ...Table of Contents PHOIBOS...
Page 10: ...Introduction 4 PHOIBOS...
Page 13: ...Electrical Connections Figure 2 Connection Scheme PHOIBOS 7...
Page 14: ...Components and Connections Figure 3 Analyzer Housing PHOIBOS100 8 PHOIBOS...
Page 15: ...Electrical Connections Figure 4 Analyzer Housing PHOIBOS150 PHOIBOS 9...
Page 42: ......
Page 51: ...SpecsLab Hardware and Software Installation PHOIBOS 45...
Page 52: ......
Page 62: ......
Page 78: ...Analyzer Checks Figure 33 Schematics of the 12 pin Analyzer Feedthrough 72 PHOIBOS...
Page 80: ......
Page 86: ......
Page 92: ...List of Figures Figure 39 Alignment Pin 84 II PHOIBOS...
Page 93: ...List of Figures PHOIBOS III...
Page 94: ......
Page 96: ......
Page 98: ...Index PHOIBOS...
