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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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Stark-tuned, far-infrared laser for high-frequency plasma diagnostics.

D K Mansfield, P A Krug, M Vocaturo

|August 25, 2010

Summary

A new Stark-tuned methanol (CH3OH) laser offers high power and frequency splitting for advanced plasma diagnostics. This optically pumped far-infrared laser achieves 100 mW output and 34 MHz splitting, exceeding standard techniques for thermonuclear fusion research.

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Area of Science:

Optics and Photonics
Plasma Physics
Quantum Electronics

Background:

Far-infrared lasers are crucial for plasma diagnostics.
Stark tuning offers precise frequency control.
Methanol (CH3OH) lasers provide specific far-infrared wavelengths.

Purpose of the Study:

To develop a high-power, Stark-tuned optically pumped far-infrared CH3OH laser.
To achieve a well-separated Stark doublet for modulated interferometry.
To enhance modulation frequencies for plasma diagnostics.

Main Methods:

Construction of a Stark-tuned optically pumped far-infrared CH3OH laser.
Operation at 119 microm wavelength.
Application of high pump power (65 W) and electric fields (1 kV/cm).

Main Results:

Achieved over 100 mW continuous wave (cw) output power.
Observed a frequency splitting of 34 MHz due to the Stark doublet.
Demonstrated a modulation frequency significantly higher than standard methods.

Conclusions:

The developed laser is suitable for current modulated interferometers in large thermonuclear plasma devices.
The high output power and frequency splitting enable advanced plasma measurements.
This technology offers a substantial improvement in achievable modulation frequencies for fusion research.