ASDEX Upgrade

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ASDEX Upgrade
Axially Symmetric Divertor Experiment Upgrade
MW
Discharge duration10 s (pulse)
Plasma current2 MA
History
Year(s) of operation1991–present
Preceded byASDEX
ASDEX Upgrade model

ASDEX Upgrade (Axially Symmetric Divertor Experiment) is a

Max-Planck-Institut für Plasmaphysik, Garching that went into operation in 1991. At present, it is Germany's second largest fusion experiment after stellarator Wendelstein 7-X
.

Overview

To make experiments under reactor-like conditions possible, essential plasma properties, particularly the plasma density and pressure and the wall load, have been adapted in ASDEX Upgrade to the conditions that will be present in a future fusion power plant.

ASDEX Upgrade is, compared to other international tokamaks, a midsize tokamak experiment. It began operation in 1991 and it succeeds the ASDEX experiment, which was in operation from 1980 until 1990.

One innovative feature of the ASDEX Upgrade experiment is its all-

carbon fibre composites (CFCs) or beryllium. This result allows for far less tungsten to "contaminate" a proposed break-even plasma. ASDEX Upgrade will examine ways to overcome this problem, in preparation for the construction of ITER
's first wall.

The experiment has an overall radius of 5 metres, a gross weight of 800

neutral beam injection, 6 MW via ion cyclotron resonance heating (ICRH) at frequencies between 30 and 120 megahertz, and 2 x 2 MW of electron cyclotron resonance heating (ECRH) at 140 gigahertz
. It has 16 toroidal field coils and 12 poloidal field coils.

Three large

flywheel generators feed the 580 MVA pulsed power supply system for the magnetic confinement and plasma heating.[1]

ASDEX

ASDEX (with a major radius R=1.65m, minor radius a=0.4m, and plasma current Ip≤500kA) started operation in 1980.[2] In 1991, it was dismantled by personnel of the Southwestern Institute of Physics (SWIP), transported to Chengdu, China, and its main components were used to build the HL-2A.[3][4]

The H-mode was discovered in ASDEX in 1982.

See also

External links

References

  1. S2CID 30544871
    .
  2. ^ M. Keilhacker, "The ASDEX divertor tokamak", Nuclear Fusion, vol. 25, no. 9, 1985
  3. ^ Y. Liu et al., "Recent advances in the HL-2A tokamak experiments", Nuclear Fusion, vol. 45, no. 10, 2005
  4. ^ Isabella Milch (2002-12-02). "ASDEX – German fusion device now re-operating in China".
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