Davis Millimeter-Wave Research Center

Microwave/Millimeter Wave Technology

Plasma Diagnostics

 

 

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Plasma diagnostics

 

µ-wave vacuum electronics

 

µ-wave solid state technology

 

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Prof. N.C. Luhmann, Jr.

 

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Multichannel Tangential FIR Laser


Interferometer/Polarimeter for NSTX (FIReTIP)


Introduction


     Far-infrared (FIR) lasers are widely utilized for interferometric/polarimetric measurements of plasma electron density profiles and parallel magnetic field profiles in contemporary magnetic fusion devices. UC Davis, in collaboration with PPPL, is refurbishing the Tangential Interferometer/Polarimeter (FIReTIP) for The National Spherical Torus Experiment (NSTX) in the Princeton Plasma Physics Laboratory (PPPL). A triple FIR laser configuration has been adopted for the system.

The objectives of this project are:

·         To provide temporally and radially resolved electron density profile data for transport and equilibrium studies in NSTX.

·         To provide temporally and radially resolved toroidal field profile data for the study of paramagnetism and diamagnetism in NSTX.

·         To measure the plasma density fluctuations due to coherent waves (RF products, MHD modes such as TAE, etc.) and incoherent waves (turbulence) in NSTX.

Further information is available via the links below:

·         Principles of Interferometry/Polarimetry

·         Current Status and Projected Progress

·         The CO2/FIR Lasers for the FIReTIP System

·         Phase Detection Electronics for the FIReTIP System

·         Recent Progress and Physics Results

·         Computer Simulations of Anticipated Performance (reference only)

·         Optical Layouts of the old FIReTIP System (reference only)


 
 
 
 
 
 
 
 
 
 
              
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