Laser-aided spectroscopy

Requirements

• Tunable powerful laser and wavelength extenders and doublers.
• Laser-beam transport and shaping system.
• Light detection system - spectrometers, photomultipliers, time dispersers (streak cameras), CCD's, photodiodes.

Capabilities

• Measurements at wavelength range from UV up to far IR.
• Laser resonant absorption and laser induced fluorescence (LIF).
• Polarization spectroscopy and saturation spectroscopy.
• Laser Raman spectroscopy.
• Coherent spectroscopy.

Advantages

• Non-intrusive measurements.
• High spatial and temporal resolutions.
• High spectral resolution and flexible spectral selectivity.
• High detection sensitivity and signal-to-noise ratio.

Applications in our laboratory

• Experimental studies of densities and velocity distributions of atoms and ions and of the charge state distributions in the plasma bulk and in the immediate vicinity of surfaces.
• Investigations of the electric and magnetic fields both inside the plasma volume and in the sheaths
• Plasma seeding technique development and investigation.
• Investigation of various plasma-wall interactions, such as plasma formation in plasma sources, material ejection from surfaces into plasmas, plasma-assisted manufacturing, and plasma sheaths.

Measurements in our laboratory

• Ion Diode experiments utilized LIF and Laser Absorption for plasma properties investigation: - plasma density, plasma temperature, particle velocities and charge state distribution.
• POS experiments use LIF and Laser Absorption for the measurements of the local plasma parameters:
  • plasma density, plasma temperature, particle velocities and plasma composition;
  • measurements of local parameters and distributions of electric and magnetic fields in current carrying plasma;
  • development and characterization of novel plasma doping techniques fluorescence.

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