Fusion Device data - Wendelstein 7-X

Title of DeviceWendelstein 7-X
OrganizationMax-Planck-Institut für Plasmaphysik
LocationGarching, Germany
A. Device concept and components
Concepthelical axis stellarator (Helias)
Vacuum vessel: -- Plasma facing material:boron carbide coating
Divertor/limiter facing materialgraphite
Working Gasdeuterium, hydrogen
Boundary configuration: island divertor
Toroidal magnetic field (on axis), B (T): 3.0
Remarksmodular coils, superconducting
B. Plasma geometry
Major radius, R(m): 5.5
Minor radius, a(m): 0.53
Plasma volume (m3): 30
C. Plasma parameters (maximum values)
Central ion temperature, Ti (keV): -
Central electron temperature, Te (keV): -
Line averaged plasma density, <n> (1020 m-3): -
Central electron density, n (1020 m-3): -
Plasma current, I (MA): -
Discharge pulse duration (s): 1800.
Plasma beta, <β> (%): -
Stored energy, (MJ): -
Energy confinement time, τE (s): -
Remarks:30 min pulses with ECRH
D. Plasma heating and current drive (device values)
Ohmic heating, (MW):-
NBI heating, (MW):4.5 (stage 1), 18 (stage 2)
RF heating: -IC: (MW):3.0
RF heating: -EC: (MW):10.0
RF heating: -LH: (MW):-
E. Reactor relevant plasma performance parameters
Triple fusion product, ( 1020 keV s m-3): -
QDT factor (if available):-
F. Input information
Date of entry 4-Feb-2003
Data was entered by: Rudolf Brakel