WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 1 Design Review Plasma Vessel The Plasma Vessel Support Structure Horizontal Support by Mr. J. Reich Wendelstein 7-X Basismaschine Department Cryostat

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 2 Horizontal support 1.Functions of the horizontal support 2.Centering of the plasma vessel 2.1. Global design 2.2. Forces on one point 2.3. Design of the centering points 3.Fine adjustment of the plasma vessel 3.1. Concept 4. Conclusions

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 3 1. Functions of the horizontal support - Centering the plasma vessel - Allow for the thermal expansion/contarction of the plasma vessel - Fine adjustment of the plasma vessel within +- 5 mm

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 4 5 centering points fixed on the outer vessel - fix global center - radial movement possible - no rotation possible 2. Centering of the plasma vessel 2.1. Global design - independent from the vertical support

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 5 Detail of a centering point Moving conditions: Movement on a circle around the fixed-point Centering bar with 2 swing bearings (nearly a straight line)

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie Maximum force on the centering points (forces from vacuum, bellows, outer forces) I. complete axial force on 1 pointII. complete tangential force on 1 point Maximum force: 145 KN/per centering point

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie Design of the centering point - Redesign of the port AEU from a diagnostic to a supply port - Port in two versions, round and oval - 5 times, 1 per module, - Location between two modules port AEU 10/20 Port AEU 30/40/50

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 8 Assembly situation on the outer vessel oval port AEU centering bar bracket on the outer vessel, fixed-point dome on the outer vessel

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 9 Maximum stress in the welding seam: ~220 MPa <= 225 MPa (R P1,0 at 150°C) Maximum bending: ~ 5 mm

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie Fine adjustment of the plasma vessel 3.1. Concept Basic points: - Movement of the plasma vessel within a cube - Length of each side of the cube is 10 mm, => ±5 mm - Adjustment at a time can only be done by axial movement of 1 port, it requires that all others centering bars are disconnected from the brackets - Consequent load of this port in 1 direction (tensile/pressure loading) - at least 2 guideways in order to keep the plasma vessel in right position - Fixed-points for movement and guideways on the outer vessel - Before adjustment measurement of the plasma vessel position (maybe it must be a combination of various moving steps to reach the final position)

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 11 Picture of the concept guideway 1 Moving point, all loads in axial direction guideway 2

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie 12 Detail of a moving point Maximum forces for movement on one point: 100% of static friction (axial) (1300 KN x 0.2 = 260 KN) 47% of the centering force (300 KN x 0,47 = 141 KN) Maximum stress in welding seam: 185 MPa

WENDELSTEIN 7-X Basismaschine Design Review Plasma Vessel Max-Planck- Institut für Plasmaphysik J. Reich, W7-X BasismaschineDesign Review Plasma Vessel and Ports März 2004 Folie Conclusions Centering of the plasma vessel and absorption of the movements due to the thermal contraction can be done by the 5 AEU-ports. The fine adjustment of the plasma vessel within narrow tolerances can be done by ports, too. Final solution depends on the forces from the vertical support (friction factor) and the assembling situation on the outer vessel (available space). Further investigations on the movement concept are necessary (design, FEM-calculation).