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Featured researches published by S. Raatz.


symposium on fusion technology | 2003

Cryotechnology for Wendelstein 7-X

F. Schauer; H. Bau; Y. Bozhko; R. Brockmann; M. Nagel; M. Pietsch; S. Raatz

Abstract For the underlying task to cool the Wendelstein 7-X (W7-X) superconducting coil conductors and the divertor cryo-pumps, an extended cryo-system is required. Besides the magnet coils and cryo-pumps proper, the coil housings and supports, the thermal shields of the cryostat and cryo-pumps, and the current leads (CL) have to be cooled. This is achieved by a refrigeration plant including coolant transfer lines and distribution boxes, and a widespread pipework within the cryostat. All these components are finally defined, and purchase actions are under way.


symposium on fusion technology | 2017

Refrigerator operation during commissioning and first plasma operations of Wendelstein 7-X

C. P. Dhard; M. Nagel; H. Bau; S. Raatz; U. Meyer; Thomas Rummel


26th International Cryogenic Engineering Conference | 2016

Cryogenic commissioning, cool down and first magnet operation of Wendelstein 7-X

M. Nagel; C. P. Dhard; H. Bau; H.-S. Bosch; U. Meyer; S. Raatz; K. Risse; Thomas Rummel


Physics Procedia | 2015

Final Acceptance Tests of Helium Refrigerator for Wendelstein 7-X

C. P. Dhard; M. Nagel; S. Raatz; U. Nuesslein; M. Ressel


symposium on fusion technology | 2017

First evaluation of cryogenic performance of Wendelstein 7-X cryostat

M. Nagel; C. P. Dhard; H. Bau; U. Meyer; S. Raatz; Thomas Rummel; K. Risse; H.-S. Bosch


European Cryogenic Days, Academia Meets Industry on Developments in Cryogenics | 2016

Wendelstein 7-X: first experience with the cryogenic system

C. P. Dhard; M. Nagel; S. Raatz; H. Bau; U. Meyer; K. Risse; Thomas Rummel


Joint 25th International Cryogenics Engineering Conference (ICEC 25) and 2014 International Cryogenic Materials Conference (ICMC 2014) | 2014

Final acceptance tests of helium refrigerator for Wendelstein 7-X

C. P. Dhard; M. Nagel; S. Raatz; U. Nüsslein; M. Ressel


International Cryogenic Engineering Conference 23 - International Cryogenic Materials Conference 2010 (ICEC23-ICMC2010) | 2011

Instrumentations for W7-X cryogenic systems

C. P. Dhard; H. Bau; M. Nagel; A. Friedrich; U. Meyer; S. Raatz


Fusion Engineering and Design | 2011

Cooling scheme for W7-X divertor cryo-vacuum pumps

C. P. Dhard; S. Raatz


Deutsche Kälte-Klima-Tagung 2004 | 2004

Kryotechnik für die Supraleiterspulen des Wendelstein 7-X

F. Schauer; H. Bau; Y. Bozhko; C. P. Dhard; U. Meyer; M. Nagel; M. Pietsch; S. Raatz

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