Large Helical Device

LHD
Type Heliotron
Operation date 1998–present
Major radius 3.5 m
Minor Radius 0.6 m
Magnetic field 3.0 T
Location Toki, Japan

The Large Helical Device (大型ヘリカル装置, Ōgata Herikaru Sōchi) (LHD) is a fusion research device in Toki, Gifu, Japan, belonging to the National Institute for Fusion Science. It is the second largest superconducting stellarator in the world, after the Wendelstein 7-X. The LHD employs a heliotron magnetic field originally developed in Japan.

The objective of the project is to conduct fusion plasma confinement research in a steady state in order to elucidate possible solutions to physics and engineering problems in helical plasma reactors. The LHD uses neutral beam injection, ion cyclotron radio frequency (ICRF), and electron cyclotron resonance heating (ECRH) to heat the plasma, much like conventional tokamaks.

History

  • Construction ?
  • Plasma operations from 1998
    • Neutral Beam Injection of 3 MW was used in 1999.[1]
    • In 2005 it maintained a plasma for 3,900 seconds.[2]
  • Upgrades ?

See also

References

  1. ↑ "Plasma confinement studies in LHD". 1999. Heating by NBI of 3 MW produced plasmas with a fusion triple product of 8 × 1018m−3 keV s at a magnetic field strength of 1.5 T. An electron temperature of 1.5 keV and an ion temperature of 1.1 keV were achieved simultaneously at a line averaged electron density of 1.5 × 1019 m−3
  2. ↑ Achievement of One Hour Discharge with ECH on LHD 2005

Coordinates: 35°19′34″N 137°10′07″E / 35.32611°N 137.16861°E / 35.32611; 137.16861


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.