An ultra-high resolution control unit for a scanning tunnelling microscope
The design of a novel process computer for a scanning tunnelling microscope is described. Our stabilisation system of a tunnel junction is based on a digital signal processor DSP32C from AT&T, mounted on a commercially available PC AT-compatible plug-in card. The resolution of the homemade elect...
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Published in | Thin solid films Vol. 264; no. 2; pp. 217 - 222 |
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Main Authors | , , , |
Format | Journal Article Conference Proceeding |
Language | English |
Published |
Lausanne
Elsevier B.V
15.08.1995
Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | The design of a novel process computer for a scanning tunnelling microscope is described. Our stabilisation system of a tunnel junction is based on a digital signal processor DSP32C from AT&T, mounted on a commercially available PC AT-compatible plug-in card. The resolution of the homemade electronics (I/O-system, high-voltage amplifier) comes up to 18 bit for the
z direction and 16 bit for the
x
y
direction. Hardware-offset adjustment and sample-tilt compensation are implemented. Test measurements confirm the high-resolution of our novel control unit. The concept could also be used for different scanning probe microscopes. |
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ISSN: | 0040-6090 1879-2731 |
DOI: | 10.1016/0040-6090(94)05828-8 |