Nanonis SPM Control System
Contents
1. Customized Systems Nanostructures and Surface Analysis and Surface Science and Solutions Thin Film Deposition Preparation Components Applications Nanonis SPM Control System The Expandable Engine for Your SPM Project Features Outstanding M 24 Signal Channels W Flexibility Lowest Noise and Highest Resolution WE Performance E Highly Configurable Z Controller W Reliability W Interactive Scan Control and Easy to Use H Multiple Desktop WE Advanced 2 D and 3 D Spectroscopy W Manipulation and Lithography ass WE Powerful and Clear User Interface atin oN AN O NI S E Spectrum Analyzer and Oscilloscope iss M All Signals and Parameters in Real World Units Works with any SPM Future Proof Te SSS a FEN ik ce E u mme o Mm P eee i i I LES Nanonis SPM Control System gY E the graphical user interface the Nanonis Base Package provides a fundamental framework that can be adapted and extended with a range of add on modules All basic processes such as z control scan control data acquisition atomic manipulation lithography and spectroscopy are included allowing easy control of elemen tary STM and AFM operations Fully Digital System All analog signals are converted immediately and inter nal processing is fully digital This has become possible only recently with the latest advances in the perform ance of processors and AD DA converters The advantages are The system is2. in LabVIEW NI 7833 FPGA Card Realtime Controller RC4 Pentium Processor LabVIEW RT OS Host Computer Windows XP or Vista dual or quad display data storage graphical user interface TCP IP m gt TCP IP communication buffered transfer time critical loops PI controllers data aquisition PCI bus scan generation DMA IRQ state machines register ClCre extensions digital filter oversampling Nanonis SPM Control System oeeeres Rar os Ea bes a e ee Add on Modules OC4 digitally integrated PLL Lock in Detector for all channels E Kelvin Controller AM amp FM modes E Atom tracking High voltage amplifiers and Piezo Motor Drivers Adaptation kits for commercial microscopes E Interferometer Controller High Reliability The Nanonis system has a proven track record of reli ability running for months without re boot in labs all around the world SPM experiments are complex and do not always work on the first try A reliable control system provides the safety that it will not fail just as a compli cated experiment is progressing well o old D teeta l 1 LO Old Signal Conditioning SC4 2 x 8 bit DIO ports 8 analog inputs c amp 5 kHz 09 OIW 8 analog outputs dithering oo BEE hrDAC 5 kHz Innovation in Surface Spectroscopy and Microscopy Systems Nanonis SPM Control System General Sc
3. re as that led to nanotechnology Enormous resolution is re quired to reveal the smallest features while maintain ing an acceptable sample range The Nanonis system employs sophisticated digital filtering oversampling and dithering techniques to provide the highest resolu tion The patented hrDAC technology turns the 16 bit DA converters into real 22 bit devices which would fill up a full board and cost ten times as much in a tradi tional approach There is no need to switch gains and co ordinates are absolute over the full range Nanonis is pushing the limits for high resolution scanning Interactive Scan Control The control system for a scanning probe microscope is like a cockpit and the pilot needs to be supported in all his maneuvers on the flight through the nano world The scan control module is interactive and dynamic It is pos sible to zoom in on acquired data paste scanned data to the background for reference and display different chan nels in multiple windows The motion of the tip is visual ized in real time In summary this system is designed to be a pleasure to use in line with our promise Free to explore and discover Versatile z Controller The distance between tip and sample can be controlled by any signal or combination of signals The quantita tive parameters allow the application of control theory models and yield a further understanding of tip sample interaction The user configurable z controller all
4. very flexible and scalable Software adaptations are all that is needed for rapid custom developments Digital signal links are immune to noise which is crucial for SPM applications E t has removed the limitation of range and resolu tion which was a drawback when linking systems with analog signals was common 24 Signal Channels The generic analog interface provides 24 live signals 8 outputs 8 inputs and 8 internal signals This allows connection of signals including bias voltage tunneling current deflection x y z external lock ins etc The soft ware displays all electronic signals as real world num bers in floating point representation with assigned SI units for immediate quantitative results Signal Analysis and Monitoring All signals can be inspected with the FFT spectrum analyzer signal charts oscilloscope or signal history Such fully digital and integrated software instruments are much more efficient in use less invasive better in performance and lower in cost than their external counterparts This is of great value for optimizing the experimental setup eliminating disturbances and thus improving the quality of the scientific results De ee Perens Be Bera L Feynman when he o Aa _ s conversion to real time signal processing and SPECS oe eel Cann tl beer eh ie ah Wet ARN m CIAr Aat A CrIAnAnRrA IS vision ot the science i ig i ll e te ae Chee Ded Ni SENER P ER
5. after switching the controller off Smooth off Averaging z position for reproducible hold of tip sample distance Scan Control Aquisition channels 1 24 forward and backward Scan frame Real time interactive mouse definable also non square Resolution 32 x 32 up to 8192 x 8192 also non square pixels Scan speed Max 10 kHz pixel frequency max 100 lines second const time line or const surface speed diff forward and backward speed Scan modes Single up amp down continuous up down amp bounce auto save File format Documented example load routines SPIP Gwyddion WSxM MATLAB Visualization Tip position in real time adjustable color table paste scanned image to background for reference Scan data display Up to 7 windows with different views for zoom channel color etc Display data proc None slope subtract slope and av subtract differentiate Line scan monitor Display up to 4 last scan lines forward and backward scan Slope compensation Real time adjustable in degrees smooth transitions Drift compensation Linear in 3 dimensions Generic Sweeper Sweep channels Outputs setpoints div parameters Acquisition channels 24 signals system parameters Samples per curve 32 1 M Visualization Real time during acquisition Timing Settling time and acquisition time 1 ms 10 s Spectroscopy Acquisition channels 1 24 forward and backward Sweep channels Bias z Data samples 32 1M per curve Timing Z hold av initial se
6. duct described here SPECS is a registered trademarks of SPECS GmbH SPECS Surface Nano Analysis GmbH Voltastrasse 5 13355 Berlin Germany Tel 493046 78 24 0 a fA kNet Fax 49 30 46 42 083 NG Email support specs com v Web www specs com ISO 9001 Certificate IN i Mil SPECS Signals amp Analysis Signals 24 live signals 8 inputs 8 outputs and 8 internal signals Data transfer Via TCP IP 1 kS s default up to 10 kS s Representation 32 bit floating point real world physical units Oscilloscope DC rms and peak peak measurements triggering by level or manual Spectrum analyzer Power spectral density in physical units e g A sqrt Hz Long term spectrum Power spectral density vs time as gray scale plot Signal charts Continuously rolling charts with adjustable speed Long term chart Record signals over days Signal history All 24 signals in memory for the last minute z Controller Algorithm Digital PI controller anti wind up bump less start and stop Control bandwidth Up to 2 kHz 3 dB point of closed loop transfer function Control signal Any of the 24 signals and elementary operations thereof Preprocessing Abs log bipolar Controller switching On the fly from a predefined set of controller settings Param adjustment Real time interactive physical units logarithmic or linear slider scales SafeTip User definable condition on any signal or combination thereof TipLift Z offset
7. ltage 10 V into 2 kQ 0 to 10 V per dip switch per channel Output resistance 10 short circuit safe Analog bandwidth 5 kHz 4th order Butterworth low pass filter DA converter 16 bit monotonic 1 MS s Effective resolution 22 bit patented hrDAC technolgy with active glitch compensation Noise density 350 nV sqrt Hz Output noise 30 Vrms lt 150 uVpp DC 1 MHz Digital Lines and Pulse Counter Ports 2 x 8 lines on two sub D9 female Direction Input or output for each line Signal 3 3 V TTL max 5mA per line Pulse counters 2 up to 40 MC s Coarse Positioning and Auto Approach Types Slip stick piezo drive beetle type stepper motor DC motor Interfaces Digital port serial USB GPIB ethernet etc Auto approach Different protocols configurable programmable with programming interface Graphical User Interface Operating system Windows XP Vista 7 Min requirements Pentium 2 GHz or equiv 2 GB Ram 40 GB HD two 19 Monitors with at least 1280 x 1024 pixels License Unlimited in time bound to RC4 Documentation Online help F1 for context sensitive help tip strips for each control element printed software operation manual Load amp save For every session directory settings parameters and screen layout settings Technical alterations reserved The information in this document is provided with greatest care but SPECS does not assume any liability arising from the application or use of the information or pro
8. ope of delivery Real time controller RC4 signal conditioning SC4 software and license unlimited updates and support for one year host computer opt Cases Stackable benchtop cases Wavetronics rack mount kit available Operating temp 5 C to 40 C Compliance CE Warranty One year parts and labor on defects in material and workmanship Documentation User manual for hardware and installation printed user manual for graphical user interface online help RC4 Dimensions weight 32 5 x 28 x 12 cm 4 5 kg Power Universal power supply max 60 W Components Pentium mobile 2 GHz 1 GB ram 40 GB HD 2 PCI slots ethernet adapter Operating system National Instruments Real Time OS I O card NI FPGA RIO PCI 7831R SC4 Dimensions weight 32 5 x 28 x 7 cm 3 6 kg Power 100 V 240 V 50 60 Hz 10 W automatic switching toroidal trans former linear regulated Ground 100 kQ AGND to chassis decoupled from RC4 Analog Inputs Hardware interface 8 x BNC connectors differential Diff input volt 10V range Diff input resistance 100 kQ Analog bandwidth DC 5 kHz 4th order Butterworth low pass filter AD converter 16 bit no missing codes 200 kS s Effective resolution 20 bit 10 kS s 24 bit 100 S s oversampling Analog input noise lt 15 nV sqrt Hz Converter noise 2 uV sqrt Hz Measurement noise 140 uV rms 10 kS s 45 pV rms 1 kS s Analog Outputs Hardware interface 8 x BNC referenced to AGND Output vo
9. ows on the fly switching between settings such as input signal and feedback parameters Innovation in Surface Spectroscopy and Microscopy Systems SPECS Prepared for the Future The LabVIEW Programming Interface Competitive advantage in research is often based on the modification of an instrument that allows the researcher to perform experiments in a way nobody else has done before him This is where our LabVIEW Programming Interface steps in to give you the building blocks to design your own experiment The LabVIEW programming interface consists of librar ies to access the controls and functions of the graphi cal user interface It is used to automate experiments sequences calibration routines and experimental proce dures Polling of parameters and signals at high rates allows for supervision and alarm settings etc Instead of using a simple scripting language the Nanonis Sys tem provides full access to all the features provided by LabVIEW graphs database access convenient data handling GPIB RS232 USB access to other instruments signal analysis functions and much more Advanced 2D and 3D Spectroscopy Advanced spectroscopy modules provide a set of flexible routines for experiments on a point line grid or a cloud of points E Bias spectroscopy E 7z spectroscopy Generic sweep any output or parameter can be swept while any number of other selected channels are recorded User defined experiment written
10. ttling time settling time acquisition time slew rate etc 100 us resolution up to 10 s Multi curve av With z control in between Spectroscopy on a Grid or Line Grid Rectangular min 4 x 4 max limited by 2 GB total data file File format ASCII for each curve or binary for total grid documented file format file browser amp example load routines Experiments Bias or z spectroscopy generic sweeper or any self programmed routines with LabVIEW interface Data aquired Topography set of config parameters for every point spectroscopy data LabVIEW Programming Interface Scope Library of VI s to control elements of the graphical user interface Connection Via TCP IP to VISA Server on host computer local or remote access Tasks Automate experiments automate operation sequence for calibrations and experimental procedures polling of parameters and signals at high rate for supervision alarming etc Other product and company names mentioned herein are trademarks or trade names of their respective companies Printed in March 2010 Your Local Representative Innovation in Surface Spectroscopy and Microscopy Systems
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