SRF2013 - List of Authors (Jensch, K.)

Paper	Title	Page
MOP029	Cryo-Losses Measurements of the XFEL Prototype and Pre-Series Cryomodules	162
	S. Barbanotti, J. Eschke, K. Jensch, W. Maschmann, O. Sawlanski DESY, Hamburg, Germany W. Gaj, L.M. Kolwicz-Chodak, W. Maciocha IFJ-PAN, Kraków, Poland X. Wang ESS, Lund, Sweden
	Cryo-losses measurements of the XFEL prototype and pre-series cryomodules are here presented and compared with the XFEL requirements. Cryo-losses at the 4.5 K, 80 K and 2K temperatures are calculated during the test period at CMTB (CryoModule Test Bench) at DESY to qualify the cryomodules before installation. This paper summarizes the test procedure for the different circuits (2K, 4.5K, 80K) and in different load conditions: static losses, losses due to the magnet and dynamic losses due to the RF power sent to the cavities at different MV/m levels.

MOP030	Post-Production Dimensional Control of the Cold Masses and Vacuum Vessels for the XFEL Cryomodules	165
	S. Barbanotti, W. Benecke, K. Jensch, M. Noak, M. Schlösser DESY, Hamburg, Germany
	The very tight alignment tolerances required in the XFEL Linac reflect in very tight tolerances for the production of the main cryomodule components. To verify the adherence to the specified tolerances of the cold masses and vacuum vessels, dimensional controls with laser tracker are performed at the production site following DESY experts’ instructions and verified at DESY with an independent measurement. We present here the measurement strategy and a summary of the results obtained so far.

MOP031	Quality Control of the Vessel and Cold Mass Production for the 1.3 GHz XFEL Cryomodules	168
	S. Barbanotti, H. Hintz, K. Jensch, W. Maschmann DESY, Hamburg, Germany
	The industrial production of one hundred cold masses and vacuum vessels for the 1.3 GHz XFEL cryomodules is now fully in operation. Quality checks at the companies and controls at DESY assure the quality level required for the cryomodule assembly. Verification of the main production steps, non-destructive tests, dimensional controls are performed by DESY personnel before accepting the components. This paper resumes the quality control strategy and the results for the first components produced by the companies.

Paper

Title

Page

Cryo-Losses Measurements of the XFEL Prototype and Pre-Series Cryomodules

162

S. Barbanotti, J. Eschke, K. Jensch, W. Maschmann, O. Sawlanski
DESY, Hamburg, Germany
W. Gaj, L.M. Kolwicz-Chodak, W. Maciocha
IFJ-PAN, Kraków, Poland
X. Wang
ESS, Lund, Sweden

Cryo-losses measurements of the XFEL prototype and pre-series cryomodules are here presented and compared with the XFEL requirements. Cryo-losses at the 4.5 K, 80 K and 2K temperatures are calculated during the test period at CMTB (CryoModule Test Bench) at DESY to qualify the cryomodules before installation. This paper summarizes the test procedure for the different circuits (2K, 4.5K, 80K) and in different load conditions: static losses, losses due to the magnet and dynamic losses due to the RF power sent to the cavities at different MV/m levels.

MOP030

Post-Production Dimensional Control of the Cold Masses and Vacuum Vessels for the XFEL Cryomodules

165

S. Barbanotti, W. Benecke, K. Jensch, M. Noak, M. Schlösser
DESY, Hamburg, Germany

The very tight alignment tolerances required in the XFEL Linac reflect in very tight tolerances for the production of the main cryomodule components. To verify the adherence to the specified tolerances of the cold masses and vacuum vessels, dimensional controls with laser tracker are performed at the production site following DESY experts’ instructions and verified at DESY with an independent measurement. We present here the measurement strategy and a summary of the results obtained so far.

MOP031

Quality Control of the Vessel and Cold Mass Production for the 1.3 GHz XFEL Cryomodules

168

S. Barbanotti, H. Hintz, K. Jensch, W. Maschmann
DESY, Hamburg, Germany

The industrial production of one hundred cold masses and vacuum vessels for the 1.3 GHz XFEL cryomodules is now fully in operation. Quality checks at the companies and controls at DESY assure the quality level required for the cryomodule assembly. Verification of the main production steps, non-destructive tests, dimensional controls are performed by DESY personnel before accepting the components. This paper resumes the quality control strategy and the results for the first components produced by the companies.