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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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A Multimodal Wide-Field Fourier-Transform Raman Microscope

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Upper wide-angle viewing system for ITER.

C J Lasnier1, A G McLean1, A Gattuso2

  • 1Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.

The Review of Scientific Instruments
|December 3, 2016
PubMed
Summary
This summary is machine-generated.

The Upper Wide Angle Viewing System (UWAVS) for ITER will use IR cameras for accurate temperature measurements. Design considerations address IR light interference and optical component temperatures for reliable 500 Hz data acquisition.

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Area of Science:

  • Plasma diagnostics
  • Fusion energy research
  • Optical engineering

Background:

  • ITER requires advanced diagnostic systems for plasma monitoring.
  • The Upper Wide Angle Viewing System (UWAVS) is crucial for observing plasma behavior.
  • Accurate temperature measurements are essential for plasma control and understanding.

Purpose of the Study:

  • To outline the requirements and preliminary design of the UWAVS for ITER.
  • To analyze the impact of self-emitted infrared (IR) light on measurement accuracy.
  • To calculate signal-to-noise ratios for the two-color temperature output.

Main Methods:

  • Reviewing major system requirements for UWAVS.
  • Presenting a preliminary design with justifications for design choices.
  • Investigating self-emitted IR radiation from optical components.
  • Calculating signal-to-noise ratios (SNR) based on integration time and divertor temperature.

Main Results:

  • Accurate temperature output necessitates corrections for vacuum window absorption and self-emitted IR.
  • Measurement of optical component temperatures is critical for IR correction.
  • Calculated SNRs are adequate for the target 500 Hz frame rate with current IR camera technology.

Conclusions:

  • The UWAVS design meets the stringent requirements for ITER plasma diagnostics.
  • Corrections for optical and environmental factors are feasible for high-accuracy temperature measurements.
  • The system is expected to provide reliable, high-speed temperature data essential for ITER operation.