Third Harmonic RF Systems developments for the XFEL

Third Harmonic RF Systems developments for the XFEL and for FLASH as prototype

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype Bunch forming n two stage bunch compression at the XFEL Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 2

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype Phase space linearization n Additional effects: space charge, longitudinal wake fields, . . . n Sum voltage required: 40 MV n Using nine-cell superconducting cavities Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 3

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype 3. 9 GHz cavities are ‘downscaled’ from 1. 3 GHz Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 4

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype FNAL build 3. 9 GHz module as archetype ACC 39 n contains four cavities n to be installed in FLASH n Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 5

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype Later position of ACC 39 in FLASH Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 6

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype In the FLASH tunnel Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 7

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype ACC 39 will first be tested at the CMTB Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 8

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype Design differences FLASH and XFEL n sum voltage 40 MV instead of ~ 19 MV n 8 cavities instead of 4 n XFEL module with quadrupole and BPB n several cavity design changes due to the production by European industry Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 9

Third Harmonic RF Systems - developments for the XFEL and for FLASH as prototype Proposed work distribution INFN and DESY n INFN develops and builds the cavities and the module n DESY develops and provides the surrounding systems like power RF, RF control and lager infrastructure like the horizontal cavity test capability, the clean room for string assembly, and so on Meeting: CERN-SPL & DESY-XFEL, Thursday 8 th September 2009 Elmar Vogel (DESY Hamburg) 10