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SPECS PHOIBOS Series User Manual
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Work Function
the SpecsLab2 program. Adjust the desi
red voltage ranges separately (select
the voltage
range in the analyzer settings before the measurement).
Please take note of section 7.4 “Work Function Calibration with UPS” on page 61.
PHOIBOS
35
40
42
Table of Contents
Default Chapter
3
Table of Contents
3
1 Introduction
7
Overview
7
2 Components and Connections
11
System Description, Package Contents
11
Electrical Connections
12
Figure 1: Package Contents
12
Figure 2: Connection Scheme
13
Figure 3: Analyzer Housing (PHOIBOS100)
14
Figure 4: Analyzer Housing (PHOIBOS150)
15
Figure 5: Analyzer Main Components and Voltage Principle
16
3 Spectrometer
17
The Lens System
18
Figure 6: High Point Transmission Mode
19
Figure 7: Medium Area Mode
20
Figure 8: High Magnification Mode
21
Table 1: Acceptance Angle Vs. Iris Diameter for a Point Source
21
Table 2: Overview of the Lens Modes
22
Figure 9: Typical Intensity-Position Profile with Iris Aperture
23
Table 3: Recommended Iris Values for Spatially Resolved Measurements
23
Hemispherical Analyzer (HSA)
24
Magnetic Shielding
26
Magnetic Coupling for -Metal Chambers Μ
27
Trim Coil
27
Figure 10: PHOIBOS Μ-Metal Shielding
27
Slit Orbit Mechanism
28
Figure 11: Magnetic Field of the Trim Coil
28
Table 4: Standard Slit Configuration
29
Figure 12: External Rotary Dial for Positioning
30
Figure 13: Entrance and Exit Slit Rings (Slit Combination 4-B)
30
Single and Multichannel Detector (SCD) / (MCD)
31
Principles of Detection
31
Figure 14: Exit Slit Selection
31
Coherence of Epass and Step
32
Electron Multiplication
33
Extended CEM
35
Figure 15: Detector Sweep, Count Rate Vs. Voltage
35
Linearity of the Cem's
36
Figure 16: Lifetime of the Extended Dynamic Range CEM
36
Figure 17: Linearity Plot for the New Extended Range CEM
37
Conversion Energy
38
Figure 18: Efficiency Plot for the New Extended Range CEM
38
Spectrometer Voltage U0
39
Figure 19: Detection Efficiency for Electrons and Ions
39
Work Function
40
Figure 20: Energy Scheme - Photoelectron Spectroscopy
40
4 Installation
43
Unpacking
43
Mounting the Detector
43
Figure 21: Removal of the Transportation Locks
44
Achieve the Maximum Lifetime of a Channel Elec- Tron Multiplier
45
Figure 22: Corresponding Hole in the Ground Plate
45
Alignment
46
Analyzer Alignment
46
Vacuum Installation
47
Figure 23: Mounting Tips
48
Baking out
49
Figure 24: Detector Flange
49
Electronic Units Installation
50
Specslab Hardware and Software Installation
50
5 Unit Operation
53
First Operation
53
Quick Start
53
Detailed Operation
54
Slit Setting
54
Detector Operation
54
Figure 25: Starting up the Detector
54
Functional Test
55
XPS (AES/UPS) Operation
55
ISS Operation
56
6 Troubleshooting
57
Short Circuits
57
Possible Problems
57
Table 5: no Spectrum
58
Table 6: Low Intensity
59
Table 7: Low Energy Resolution
59
Table 8: Peaks Shifted Equally
60
Table 9: Peaks Shifted Differently
60
Table 10: Intensity Fluctuations
60
Table 11: High Background Signal
60
Table 12: Noisy Spectrum
61
Table 13: Incorrect Area was Analyzed in All Lens Modes
61
7 Calibration
63
Complete Calibration Procedure
64
Figure 26: Menu - "Analyzer Settings
64
Recalibrate the DAC Precision
65
Figure 27: Analyzer Cailbration Procedure
65
MCD Calibration
66
Figure 28: MCD Calibration
66
Work Function Calibration with UPS
67
Work Function Calibration with XPS
68
Offset Calibration with UPS
68
Figure 29: Fermi Edge Operation
68
Figure 30: Fermi Edge Operation
69
Gain Calibration with XPS
70
8 Analyzer Checks
71
Independence of Peak Position with Pass Energy
71
Energy Scale Tests with XPS
72
Check Kinetic Energy Scale
72
Check Peak Position
72
Specification Check
73
Survey Spectrum of Silver
73
Table 14: Calibration Binding Energies for Non-Monochromated Mg Kα X-Rays
73
Intensity and Resolution
74
Figure 31: XPS on Silver, Wide Scan (PHOIBOS 150 MCD9)
74
Connection Check of the Analyzer Electrodes
76
Figure 32: XPS on Silver, Ag 3D (PHOIBOS 150 MCD9)
76
Capacitance Check for Electrodes
77
Check the Cable Contacts
77
Table 15: Capacitance Measurements (Pf), PHOIBOS100 R6 or Higher
77
Table 16: Capacitance Measurements (Pf), PHOIBOS150 R6 or Higher
77
Figure 33: Schematics of the 12-Pin Analyzer Feedthrough
78
Check All Analyzer Voltages
79
Figure 34: Schematics of the 12 Pin Detector Feedthrough
79
9 Deflector Settings
81
Preamplifier
81
Discriminator
81
Amplifier Check
82
Detector Voltage
82
Figure 35: PCU Amplifier Test
82
Noise
83
Suppress a Noisy Channel
83
Switch off Certain Channels
83
Mask Example for MCD9
84
Figure 36: Counterchannelmask for MCD9, 1+2+8+9 off
84
Mask Example for MCD5
85
10 Spare Parts
87
Cu Gasket
87
Multiplier
87
Channeltron Handling and Storage
87
Handling of the Multiplier
87
Operation of the Multiplier
88
Storage of the Multiplier
88
Change a Channeltron
88
Removing the Detector Flange
88
Replacing Channeltrons
88
Mounting the Detector Flange
89
Figure 37: Screws Fixing the Ceramic Rods and Adjustment Crew
89
Figure 38: Pull Back the Ceramic Rods, Remove the Channeltron
89
4
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SPECS PHOIBOS Series Specifications
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Brand
SPECS
Model
PHOIBOS Series
Category
Measuring Instruments
Language
English
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