Alexey Sulimov, DESY (Hamburg), 28 May 2013 RF Measurements and Documentation for the Industrial Fabrication of SC Cavities.

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Presentation transcript:

Alexey Sulimov, DESY (Hamburg), 28 May 2013 RF Measurements and Documentation for the Industrial Fabrication of SC Cavities.

2/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities RF aspects of quality control for XFEL cavities RF aspects of quality control for XFEL serial cavities. RF Measurements and Documentation for the Industrial Fabrication of SC Cavities IPAC’11

3/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities Production Sequence Production sequence: Cavity parts fabrication, Cavity welding, Cavity tuning, Welding in helium tank (HT), Pressure test (PT), Cavity transport. EDMS XFEL Data Base V_F01x16; V_F02; V_F03; W_F01x8; W_F02; W_F03; X_HCP; X_M01; X_F01; X_M02; X_F02; X_M03; X_F03; Y_M01; Y_F01; Y_F02; Y_F03. Inspection Sheets for RF control:

4/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities Cavity parts fabrication Cavity parts fabrication: Shape control for half cells (HC), end groups (EG) and dumb-bells (DB); DBs asymmetry control; Calculation of optimal parts lengths; DBs sorting in cavity; Estimation of cavity length in helium tank.

5/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities After cavity welding: Measure the pi-mode frequency and cavity length; Control the welding parameters (shrinkage and deformation); Calculated the cavity length in helium tank. Cavity Welding (Acceptance Level 1)

6/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities Values are controlled during cavity tuning: pi-mode frequency, field flatness (FF), cavity length, cavity cells eccentricity. Cavity Tuning

7/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities Welding in helium tank, pressure test: Control of pi-mode frequency during the rings with bellow and HT welding; Checking of RF parameters (Fpi, FF) before and after HT and PT. Welding in Helium Tank and Pressure Test (Acceptance Level 2)

8/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities Cavity Transport (Acceptance Level 3) To estimate Field Flatness (FF) changes the two spectra have to be compared: Reference spectrum SP2 can be downloaded from XFEL DB (it’s a spectrum with known value of FF ref ) N = 9 – number of cavity cells, measured spectrum SP1 = {f i }, SP2 = {F i }, where i = 1…N. Relative spectrum is calculated as: RS = {R i } = {F i /f i – F N /f N }, where i = 1…N. Linear Fit is calculated for relative spectrum: L = {L i } = linear_fit{R i }, i = 1…N Mean squared error is calculated as: Mean spectrum frequency deviation is calculated as:

9/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities Conclusion V_F01x16; V_F02; V_F03; W_F01x8; W_F02; W_F03; X_HCP; X_M01; X_F01; X_M02; X_F02; X_M03; X_F03; Y_M01; Y_F01; Y_F02; Y_F03. Inspection Sheets for RF control: EDMS XFEL Data Base 39 documents X 800 cavities documents 312 documents / week

10/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities We appreciate: company E.Zanon for possibility to present the data. IPP DESY group for supporting the EDMS and data transfer. DESY Data Base Team for organizing the automation of data analysis. Acknowledgements

11/11 ECFA LC2013, 28 May 2013 Alexey Sulimov, Jens Iversen, Denis Kostin, Wolf-Dietrich Möller, MHF-SL, DESY (Hamburg) RF Measurements and Documentation for the Industrial Fabrication of SC Cavities THANK YOU ! Thank you all for attention !