3582427140
Department of Surface and Nanostructures Physics Institute of Physics UMCS
Minimal (required) freguency of resonance
L = 25.4 mm D = 6.5 mm w = 0.7 mm
f1 = 30 kHz
For 400 lines x 400 pixels x 1 picture /30 sec. frequency band of f = 5333 Hz is required. Mechanical system of STM (critically dumped) remains stable if resonant frequency is larger than fx2 = 8377 Hz. Z - control requires even larger resonant frequency of the scanner tubę.
Forscanner tubę:
1. use short tubę (Iow scanning rangę),
2. short tip,
3. Iow mass of the tip.
3
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