Multichannel Tangential FIR Laser
Interferometer/Polarimeter for NSTX (FIReTIP)
Optical Layouts of the
FIReTIP System
■ The top view of NSTX and the seven beam
paths of the FIReTIP system are shown below. The entrance windows are located
at Bay K (the man hole). Three retro-reflectors are located outside the vacuum
chamber, while the other four are attached to the inside wall of the vacuum
vessel, which will suffer from machine vibration during the discharges.
■ Shown in the figure below is the schematic of the FIReTIP system. The lasers are mounted on a granite table, while the FIR optics are arranged on a separate optical table (4’´10’) in two levels. The FIR beams are coupled to and from the plasma via the fiber glass structure.
■ Shown in the figure below is the optical layout in the lower level optical table. Optics for the first three channels as well as the LO signals are arranged in this layer, which were installed in Phase 1 of the FIReTIP development program.
■ Shown in the figure below is the optical layout in the upper level optical table. Optics for the remaining four channels are arranged in this layer, and were installed on NSTX in Phase 2 of the FIReTIP development program.
■ Further information is available:
· Introduction to
the FIR Tangential Interferometer/Polarimeter (FIReTIP)
· Principles
of Interferometry/Polarimetry
· The CO2/FIR
Lasers for the FIReTIP System
· Phase
Detection Electronics for the FIReTIP System
· Computer
Simulations of Anticipated Performance
· Recent
Progress and Physics Results
Send comments to: cwdomier@ucdavis.edu.
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