Hard- and Software Features
ASC500 SPM controller and Daisy software interface
Lithography
The ASC500 also offers a lithography mode. Any geometrical shape composed
from convex polygons and single dots can be scanned with full control over scan
speeds and line spacings for each shape unit. Shape definition is done via text
files for full flexibility. Furthermore, a shutter can be controlled via TTL pulses
for each shape unit. Lithography can operate in both open and closed loop mode.
• scanning of arbitrary shapes composed from polygons and dots
• full speed control for each shape unit
• very flexible shape definition
• shutter controller via TTL
Digital/Analog Converters (DAC/ADC)
The outstanding input and output capabilities of the ASC500 are the key to highest
precision measurements. Its analog-digital converters use state-of-the-art
hardware with lowest possible noise. On-board preamplifiers and switchable
low-pass filtering allow for maximum signal-to-noise ratio. The high frequency
in- and output section of the ASC500 allows for sophisticated measurement concepts.
Additional features include:
• oversampling and offset compensation
• analog modulation inputs for the most important channels
• 6 ADC inputs with 400 kS/s, 18 bit
• 2 high frequency ADC inputs with 50 MS/s, 16 bit
• 4 DAC outputs with 200 kS/s, 16 bit
• software defineable transfer function
Q Control
The ASC500 provides full control over the Q factor of any driven oscillator system
by means of electronic Q control. The natural Q factor can be varied by typically
more than one order of magnitude in each direction.
Benefits are:
• to gain sensitivity due to increased Q factor
• to gain scan speed in ultra-high Q setups by reducing the Q factor
• to use well-known room temperature scan parameters also for low temperature
experiments with help of Q reduction