My watch list  


GEKKO XII is a high-power 12-beam neodymium doped glass laser at the Osaka University's Institute for Laser Engineering completed in 1983, which is used for high energy density physics and inertial confinement fusion research. The name refers to the twelve individual beamlines used to amplify the laser energy.

Unlike most other modern ICF lasers which are frequency tripled to the third harmonic, the GEKKO XII is only frequency doubled to 532 nm (green light). Compared to most Nd:glass laser ICF experiments GEKKO is also quite small, with beamlines about 10 m long. The 12 beams of the GEKKO laser are capable of delivering about 10 kilojoules per 1-2 ns pulse (10-20 terawatts).

In 1996-1997 the GEKKO system was upgraded with a ~0.4 kJ, 0.5 PW ultra-short pulse beam which was used to investigate a promising new technique of ICF known as "fast ignition", where the compression phase of target implosion is decoupled from the heating phase. GEKKO, using the petawatt beam for heating, along with the original beams for compression, demonstrated a fusion yield enhancement of 3 orders of magnitude when the petawatt beam was used[1].

GEKKO is currently being upgraded with the addition of a second "side-by-side" laser, the LFEX (Laser for Fast Ignition Experiment), part of the FIREX-1 program, in order to deliver a 10 kJ pulse of energy to a target in 10 picoseconds, further exploring the fast ignition regime.


  1. ^ Nuclear fusion: Fast heating scalable to laser fusion ignition, Kodama et al., Nature 2002

See also

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 – Polywell – Dense plasma focus

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) | TFTR (USA) | NSTX (USA) | NCSX (USA) | UCLA ET (USA) | Alcator C-Mod (USA) | LDX (USA) | H-1NF (Australia) | MAST (UK) | START (UK) | ASDEX Upgrade (Germany) | 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) | Luli2000 (France) | GEKKO XII (Japan) | ISKRA lasers (Russia) | Vulcan laser (UK) | Asterix IV laser (Czech Republic) | HiPER laser (European)
Non-laser driven: — Z machine (USA) |

See also: International Fusion Materials Irradiation Facility

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "GEKKO_XII". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE