Electric Spray Details

Aim of Experiment:

To learn how to control the size and charge of droplets

Application of Electric Spray:

  • Fuel injection
  • High-speed printing
  • Painting
  • Scientific research in biology and nanotechnology

Advantages of Electrostatic Sprays:

  • Narrow distributions of droplet sizes
  • No agglomeration of droplets
  • Control of droplets’ trajectories (due to charge)

Researchers:

Dr. Tian-Sen Huang   
e-mail: tshuang@pvamu.edu

Dr. Yuri Petrov            
e-mail: yvpetrov@pvamu.edu

Parameters of Device:

  • 1.8 m long by 0.41 m diameter cylindrical vacuum tank
  • Mechanical and Diffusion pumps:

P = 10-5 torr

  •  Needle ID 0.33 mm
  • Needle Voltage  -4…-7 kV
  • Octoil+tetrabutyl ammonium picrate
  • Quadrupole mass filter:

    Steel rods L = 1.43 m,
    gap = 16.5 mm 
    Vrf = 200 – 3000 V
    frf = 200 – 800 Hz
    Udc = 0 – 500 V
    Q/m = 0.02 – 2.0 C/kg

  • Detector:
    • Circular plate + etched emitter material on copper sponge
    • Copper cone shield
    • Amptek A250 charge sensitive preamplifier
  •   Multichannel analyzer: Canberra-35

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