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A new multichannel interferometer system on HL-2A.

Y Zhou1, Z C Deng, Z T Liu

  • 1Southwestern Institute of Physics, Chengdu 610041, China.

The Review of Scientific Instruments
|December 7, 2007
PubMed
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A new HCN interferometer on the HL-2A tokamak uses advanced lasers and detectors for precise plasma measurements. This system successfully measured plasma density profiles and sawtooth behavior during experiments.

Area of Science:

  • Plasma physics
  • Fusion energy research
  • Interferometry techniques

Background:

  • Accurate measurement of plasma density is crucial for understanding and controlling fusion plasmas.
  • Existing interferometry methods face challenges in spatial resolution and signal detection.
  • The HL-2A tokamak requires advanced diagnostics for effective plasma research.

Purpose of the Study:

  • To develop and implement a novel multichannel HCN interferometer for the HL-2A tokamak.
  • To enhance spatial resolution and signal quality for plasma density measurements.
  • To apply the new interferometer for studying plasma density profiles and sawtooth oscillations.

Main Methods:

  • Utilized a 6-meter waveguide HCN laser to boost optical resource power.

Related Experiment Videos

  • Employed high-response, room-temperature waveguide Schottky diode detectors for improved beat signal detection.
  • Integrated focusing metal mirrors and a compensated optical system for 7 cm spatial resolution.

    • Main Results:

    • Successfully deployed the multichannel HCN interferometer on the HL-2A tokamak.
    • Achieved a spatial resolution of 7 cm for plasma measurements.
    • Demonstrated the system's capability in measuring plasma density profiles and density sawtooths.

    Conclusions:

    • The developed multichannel HCN interferometer is effective for plasma density profile and density sawtooth measurements on the HL-2A tokamak.
    • The combination of a high-power laser and sensitive detectors significantly improves diagnostic capabilities.
    • This advancement contributes to better plasma control and understanding in fusion research.