Large Helical Device

From Wikipedia, the free encyclopedia

**LHD**

Type:	Heliotron
Major radius:	3.5–4.1 m
Minor radius:	0.6 m
Magnetic field:	3T
Max. temperature:	{{{max temp}}}
Max. pressure:	{{{max pressure}}}
Max. confinement time:	{{{max confinement time}}}
First plasma:	1998??
Location:	Japan

The Large Helical Device is a fusion research device located in Japan and is the largest superconducting stellarator in the world and 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.

Fusion power v • d • e
Atomic nucleus \| Nuclear fusion \| Nuclear power \| Nuclear reactor \| Timeline of nuclear fusion Plasma physics \| Magnetohydrodynamics \| Neutron flux \| Fusion energy gain factor \| Lawson criterion
Methods of fusing nuclei
Magnetic confinement: Tokamak - Spheromak - Stellarator - Reversed field pinch - Field-Reversed Configuration - Levitated Dipole Inertial confinement: Laser driven - Z-pinch - Bubble fusion (acoustic confinement) - Fusor (electrostatic confinement) Other forms of fusion: Muon-catalyzed fusion - Pyroelectric fusion - Migma - Cold fusion(disputed)
List of fusion experiments
Magnetic confinement devices ITER (International) \| JET (European) \| JT-60 (Japan) \| Large Helical Device (Japan) \| KSTAR (Korea) \| EAST (China) \| T-15 (Russia) \| DIII-D (USA) \| Tore Supra (France) \| ASDEX Upgrade (Germany) \| TFTR (USA) \| NSTX (USA) \| NCSX (USA) \| Alcator C-Mod (USA) \| LDX (USA) \| H-1NF (Australia) \| MAST (UK) \| START (UK) \| Wendelstein 7-X (Germany) \| TCV (Switzerland) \| DEMO (Commercial) Inertial confinement devices Laser driven: NIF (USA) \| OMEGA laser (USA) \| Nova laser (USA) \| Novette laser (USA) \| Nike laser (USA) \| Shiva laser (USA) \| Argus laser (USA) \| Cyclops laser (USA) \| Janus laser (USA) \| Long path laser (USA) \| 4 pi laser (USA) \| LMJ (France) \| GEKKO XII (Japan) \| ISKRA lasers (Russia) \| Vulcan laser (UK) \| Asterix IV laser (Czech Republic) \| HiPER laser (European) Non-laser driven: Z machine (USA) \| PACER (USA) See also: International Fusion Materials Irradiation Facility