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Universal controllers and regulators

Attocube Systems AG

  • Scanning probe microscope (SPM) controller

ASC500

Article: 00138275

Scanning probe microscope (SPM) controller

The ASC500 is a modular and flexible digital SPM controller which combines state-of-the-art hardware with innovative software architecture, offering superior performance and unprecedented variety of control concepts. The ASC500 controller was developed with the goal to never be the limiting factor in any SPM experiment. All desirable functions and high-end specifications for conducting the experiment of your choice in AFM, MFM, CFM, SNOM, STM, and many more are available.

FEATURES
Scan Engine
The ASC500 uses a dedicated hardware with a 5 MHz scan generator to create the voltages necessary for the raster motion. The 16 bits of the xy outputs are always automatically mapped to the actual scan field, yielding a virtually unlimited bit resolution. Further features are:

- hardware rotation of the field of view,
- hardware slope and drift compensation,
- fully software integrated control,
- LabVIEW? interface, and
- optional adjustment of scan parameters via ASC-iBox.

Z controller
The z scanner output is controlled by a digital PI algorithm with a bandwidth of 50 kHz. The z output DAC has a resolution of 18 bit, yielding a 4 pm resolution on a 1 µm scan range. This resolution can be increased to a theoretical value of 60 am by limiting the control range. Further features are:

- highly versatile; all channels can be used as control inputs,
- physical units of P/I gain,
- setpoint modulation for P/I fine tuning,
- inversion of feedback gain, and
- inversion of output polarity.

Specifications

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