MB Scientific AB Extremely High Energy Resolution Photoelectron Analyser

Transcription

1 December 2014 Product catalogue MB Scientific AB Extremely High Energy Resolution Photoelectron Analyser Model : MBS A-1 and Lens4 A-1 with Lens4 Outlook photo* *System might deviate from the picture depending on the options. Page1

2 General design & Speciality Hemispherical Electron Energy Analyser mm mean radius hemispherical electrostatic analyser with 2 layer Permalloy screen kV Compatible 3. High transmission hemisphere system with 9 slit pairs 50 m to 3.2 mm. 4. Light weight, low outgassing Permalloy vacuum case. 5. Flexible Detector Options: MCP/CCD, Spin, Delay Line. Multifunction Electrostatic Wide Angle Acceptance Zoom Lens 'L4' with Angular Scan function 1. Wide input acceptance angle with 35 mm working distance. 2. Multiple angular modes: 4, 7 and 36 degree total acceptance standard set 3. In vacuum adjustable lens axis 4. Very good focusing and flexibility by using 7 elements and electrostatic x-y deflector. 5. Angular Scan mode takes about ±15 degree perpendicular to the analyser slit without tilting sample. 2-D Detector and Detection System m c/c hexagonal retarding mesh, flat 'artefact-free' type. 2. Increased sensitivity and homogeneity with GigE Megapixel CCD camera. 3. Advanced real time image processing eliminates curved slits. Ultra High Performance Electronics 1. USB 2 Interface 2. LabView application delivered with source code 3. Completely modular system; All modules are easily exchanged by customer. 4. Energy Step Size down to (Channel Width/4) in swept mode. 5. Virtually unlimited number of independent voltages 6. High speed 8Mb/s RS485 internal communication bus. 7. Fast 16 or18 bit 1 khz pulse width modulator (PWM) control. 8. Ultra high stability & Ultra low noise level, 0.25 ppm /4 h rms typical random drift.. 9. Linearity 1 ppm typ. 10. Stable operation down to zero voltage setting by Patented (SE ) Flower current sink. 11. No slow and messy optical fibres, uses on-board 2 ns electromagnetic 15 kv isolation barrier. 12. Fast, precise D/A converters. 50 μv, 100 μv or 200 μv scanning step size options. Page2

3 Detailed Standard Specifications 1. Energy resolution at Ep 1eV with 0.2mm Less than 1.2 mev FWHM straight slit and less than 100eV kinetic energy. Typ. 0.8 mev 2. Energy resolution at Ep 2eV with 0.2mm Less than 1.6 mev FWHM straight slit and less than 100eV kinetic energy. Typ. 1.2 mev 3. Energy resolution at Ep 5eV with 0.2mm Less than 3.5 mev FWHM straight slit and less than 100eV kinetic energy. Typ. 2.8 mev 4. Resolving power Ep/ΔE at Ep 10 ev More than 1500 FWHM and 0.2mm straight slit. Typ Angular Resolution (along the slit) within an angular Less than 0.1 degree* (Ang3d9) interval of ±3.5 degree. 6. Angular Resolution (along the slit) within an angular Less than 0.5 degree* (Ang1d6) interval of ±8 degree. 7. Angular Resolution (along the slit)within an angular Less than 1 degree *(Ang0d6) interval of ±18 degree. *At less than 0.5 mm Φ emission spot size. At smaller emission spot sizes the resolution will be improved 8. Standard Lens modes Spat5: High transmission mode, five times linear magnified image of the sample focussed at the analyser entrance slit. Ang3d9: Ang1d6: Ang0d6: Angular resolving mode, 3.9 mm/degree dispersion at the analyser entrance slit. Angular resolving mode, 1.6 mm/degree dispersion at the analyser entrance slit. Wide Angular resolving mode, 0.6 mm/degree dispersion at the analyser entrance slit. Ang3d7 Epass5 Ang1d6 Epass5 Ang0d6 Epass5 9. Angular Scan modes Yes! (see page 8 to 12) Page3

4 10. Predefined pass energies UPS : 1, 2, 5, 10, 20 ev XPS and higher : 20, 50, 100, 200 ev 11. Applicable kinetic energy range UPS ev XPS ev Optional HIGH 0-6keV Optional HAXPES 0-12 kev Optional 12. Standard Slit Set 9 pairs of 25 mm long BeCu slits Straight: 0.05, 0.1, 0.1(wide aperture), 0.2, 0.4, 0.8, 1.6, 3.2 Curved: 0.2 mm with 1 mm Aperture for adjustments 13. Working distance between the lens and sample 35 mm MBS A-1 analyser with lens3 Performance of Electronics 1. Pulse Width Modulator (PWM) high precision supplies 1 Stability 1 ppm/k, 0.3 ppm/4h rms. 2 Resolution or steps. 3 Linearity ±1 ppm of full scale output. 4 Max static load 50 μa 5 Max capacitive load 30 nf 6 Absorption capability of Flower current sink; 20 μa 7 Max floating voltage; 6 kv versus ground of any terminal. Page4

5 2. High Precision DAC modules 1 Type of DAC 2 Step Size (Selectable at time of order) 3 Resolution 4 Linearity (w/o compensation table) 5 Standard Compensation Table 6 Voltage Span 7 Stability 8 Max static load 9 Max capacitive load 10 Max Floating Voltage Double Ladder, guaranteed monotonic, 5μs settling with linearization table. 50, 100 or 200 μv 17 Bits <0.01% of Max Voltage 51 points , ±6.55 or ±13.1 Volts Typ. 1 bit/year 1 ma 30 nf 6 kv. 3. Mains Power consumption V, Max 2A, 50-60Hz 4. 2-D Electron detector Dual MCP plus fibre optic phosphor screen. GigE high sensitivity CCD camera readout 5. MCP detection area 41 mm (25 mm*32 mm active) 6. Data acquisition mode Swept, Fixed, Rapid frames, 2D Angular Scan. 7. Communication interface to PC USB Interface program* LabVIEW v.i. or.exe *Attention: LabView License is NOT included. Open or modify the source code it is required LabView license 9. Flexibility adding function to the PC software Delivered with source code 10. Flexibility adding modules to the Voltage Supply Up to 254 PWM or DAC cards 11. Flexibility adding Pass Energies and Lens Modes Unlimited number easily defined Page5

6 Contents of standard set No. Amount Part 1. One set A-1 Analyser with Lens L4 2. One set A-1 Electronics 3. Five set A-1 Filterbox with cables and protective caps 4. One set Manta G-125 (or better) GigE CCD camera with adjustable mount 5. One set LabVIEW v.i.* 6. One A-1 Instrument Manual (English) 7. One A-1 Detector protective case 8. One 36mm wrench for filterbox connection Page6

7 Energy Resolution -----Better than 1meV The following data was obtained by Prof. Dr. Akira Sekiyama and Prof. Dr. Takayuki Kiss at Osaka University, Japan. The system consists of MBS A1 (#0014) with newly developed narrow band UV laser system as excitation. Fig. a (Left) Ultrahigh-resolution (< 1 mev) photoemission spectra of gold at hν = 5.9 ev. (Right) Temperature dependence of the spectra for Nb across a superconducting transition at ~9 K with the energy resolution of 1.1 mev. The following data (fig.b) was obtained by Dr. Seigo Souma at Tohoku University, Japan. The system consists of MBS A1 (#0010) with mini Mott type spin option, MBS T1 multi gas light source, in this case using Xenon gas excitation. Page7

8 MB Scientific AB A-1 Lens 4 New Angular Scan Lens is now able to take angular mapping without moving sample! Standard Angular Mode Data Angular Mapping Mode Data Өx Өx Ek (ev) Өy Page8

9 Test data taken by A-1 analyser_#0022 Date of data taken: File name: A3D0009_00.txt Data size: 2,046KB Page9

10 Angular Image data handling by MBS A1Soft MBS A-1 analyser will be delivered together with MBS A1Soft.vi which is containing functions not only taking Angular image data but also viewing the data in 2D and 3D. Following pictures are screen shots from our A1Soft data viewer. Above screen shot is the start page of A1Soft.vi For viewing the 2D Angular mapping data it shall be used View Data For viewing the 3D Angular mapping data it shall be used View 3D. Page10

11 View Data can show the 2D Angular mapping data as below; View 3D show the data as follows; The 3D Angular mapping data can be analyzed by 3 axis. This is Ek and Өy; Page11

12 This is Ek and Өx (this data is same with ordinary angular mode data); This is Өy and Өx (Angular image) at specified energy; Page12

13 Graphene/SiC(0001) Angular Scan Data taken by Prof. Dr. K. Takahashi at Saga University Synchrotron Light Application Centre using MBS A-1_#0004 with lens4 TEST00014.txt Ep20, 1d6, Slit#3, KE[ , 0.02eV], DefX[ , 0.1], -34deg, 290pA/311mA flame100 x 2scans (~1hr) HeRampTEST00008.txt Ep20, 1d6, Slit#3, KE[ , 0.02eV], DefX[ , 0.1], 35deg flame100 x 3scans (~1.5hrs) Page13

14 MBS Policy MB Scientific AB contributes to the peaceful development of the world through the activities of our leading-edge R&D, commercialization of the products, sales and education. MBS Actions 1. Focus on customers satisfaction 2. Be always faithful towards our customers 3. Keep clear responsibility in the company 4. Provide the Best Products with Best Support to make our customer quickly producing world leading data. Seminariegatan 29B, SE , Uppsala, Sweden Tel: , Fax: Homepage: Page14