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NAMMA STM

Introduction

NAMMA is a high performance, high resolution Scanning Probe Microscope for easy imaging at atomic resolution. It has been designed in a modular fashion for convenient sample loading and maintenance. An additional high voltage system is also provided as an optional module to achieve greater range.

Specifications
Scanner Type:
Modified Besocke Scanner
Range:
XY – 600 nm (5μm @ 25x optional)
Z - 90 nm (0.8μm @ 25x optional)
Resolution:
16 bits, XY - 0.01 nm, Z - 0.002 nm
Resonance:
1.5kHz
Stability:
XY - 0.3 nm/min (ideal conditions), Z – 0.1 nm/min (ideal conditions)
Tip / Sample Coarse
movement
Stick-Slip Motor:
Z motion range: < 0.5 mm
Z step size: ~ 12 nm@15 Volts
Lateral motion: ~ mm (optional)
Manual:
>10 mm
Electronics Piezo drive:
± 15V
Scanner bandwidth:
1kHz
Motor slew rate:
50V/μs
DSP Controller & DAQ:
• TI TMS320C5502 DSP @ 300MHz, Xilinx XS3S400 FPGA @ 150 MHz
• Sampling rate: ADC-150kHz,DAC-80kHz (simultaneous)
• DAC,ADC- 16bits resolution Tunneling Current preamp
Tunneling Current PreAmp:
Gain:100 mV/nA
Noise:0.02nA RMS
Sample Bias: ±10V
Tip Diameter < 50 nm
Magnetic clamping for tip exchange (optional without magnet) Tungsten tip etching setup
Sample Up to 30 mm dia, 15 mm thick
Magnetic clamping (optional without magnet)
Easy sliding mechanism for sample exchange
Mechanical Dimensions: Diameter 300mm, Height 400mm
Weight: 15kg
Accessories Digital USB Microscope and CPU with Linux Software

 

Vibration Isolation Module

Elastic chord mounted suspension system with a rigid frame, optimized for NAMMA STM

  • Natural Frequency = 1Hz
  • Eddy current damping
  • Dimension: 0.7m × 0.7m × 1.82m

 

High Voltage Amplifier

Designed to drive piezo nano positioners

  • Range: ±100V
  • Piezo scanner drive: 4 channels
  • Bandwidth – 4kHz @ 2nF load
  • Slew rate – 30V/μs @ 6nF load