WIR SCHAFFEN WISSEN – HEUTE FÜR MORGEN Steps towards beam commissioning: RF system group Paolo Craievich :: RF Section :: Paul Scherrer Institut SwissFEL Commissioning Workshop, 21 January 2016 FHNW Campus Brugg-Windisch

SwissFEL Injector Page 2 StationStructureModulatorKlystronBand Gun1PSI1ScandiNova1ThalesS-Band Booster6RI4ScandiNova4ThalesS-Band X-Band2CERN1ScandiNova1SLACX-Band Deflector1INFN1ScandiNova1ThalesS-Band Linac 1 S band (2 x4 m) Gun Laser Heater Booster1Booster 2 BC 1 S band (4x4 m) X band (2 x 0.75 m) Deflector C band (4 x 2 m) SINEG01 SINSB01SINSB03SINXB01 SINDI01S10CB01 SINSB04 SINSB02

SwissFEL C-Band Linac Page 3 S10CB01S20CB01S30CB01S30CB14.1S30CB13 LinacStructureModulatorKlystronBand Linac 136PSI9Ampegon9ToshibaC-Band Linac 216PSI4Ampegon4ToshibaC-Band Linac 352PSI13ScandiNova13ToshibaC-Band Deflector2MHI0---C-Band

Project Milestones Page 4 9 C-band modules Ref. T. Schietinger * *

SINEG01: Installation of the RF gun system Page 5  Modulator transport  Modulator assembly (water, oil) + klystron (shield)  Interlock cabling (LLRF and electricians)  Modulator connection to grid and tests  Modulator IOC commissioning  Diode tests  Cooling stations ready (KKV01)  Water cooling RF Gun  Installation of the RF waveguides and water connections  Laser alignment on the cathode  Installation of the load-lock chamber  Bake-out and leakage tests  RF measurements  LLRF activities  PSYS tests  Ready for first RF  RF conditioning – 1 week  LLRF Optimization (with cooling system)  Ready for beam Legend: Done, To be done, Interfaces to other expert groups Installation Sequence (Ref.: Installationen für Injektor Commissioning -

SINSB01 and SINSB02 systems Page 6  Modulator transport  Modulator assembly (water, oil, shield klystron, housing)  Modulator connection to grid & tests  Diode tests  Cooling stations ready (KKV01)  Connection water cooling structure & solenoids  Assembly Waveguides + final water connections  Bake-out cavity  LLRF activities + interlock tests  First RF and  RF conditioning  LLRF optimization (with cooling rack)  RF ready for beam and x

Page 7 SINSB03 and SINSB04 systems SINSB03  KKV  Modulator transport  Modulator assembly (water, oil, shield klystron, housing)  Diode tests  Assembly Waveguides + final water connections  Bake-out cavity  Ready for first RF – with Beam SINSB04  KKV  1 cavity in WLHA for pre-assembly  1 cavity at RI. Production sequence completed  MEGA power splitters with vacuum leak  Vacuum group prepares a dummy chamber pipe to substitute cavities 2x

SINDI01 (deflector) and SINXB01 (X-band) Page 8 5-cell RF deflector  KKV X-band system  KKV  Modulator transport  Modulator assembly (water, oil, shield klystron, housing)  Modulator connection to grid & tests  Diode tests  Connection water cooling structure  Assembly Waveguides + final water connections  Bake-out cavity  LLRF activities + interlock tests  Ready for first RF and RF ready for beam  Modulator transport  Modulator assembly (water, oil, shield klystron, housing)  Modulator connection to grid & tests  Diode tests  Connection water cooling structure  Assembly Waveguides + final water connections  Bake-out cavity  LLRF activities + interlock tests  Ready for first RF and RF ready for beam 20.06

Page 9 C-band Linac – Installation 1/3 ~9m  Actually 14 over 26 modules are already installed  First HV modulator (by Ampegon) will be transported from OBLA  modulator assembly (water, oil, shield klystron, housing)  modulator connection to grid & tests  PSYS tests  water connections to the 4 structures + BOC  Interlock test for diode mode  Waveguide installation  Diode mode  Interlock test for RF  Ready for conditioning

Page 10 We intend to install the last module in the SwissFEL tunnel in September At the moment the structure production meets the schedule. C-band Linac – Installation 2/3 Courtesy F. Loehl

C-band Linac – Installation 3/3 HV modulators Both modulator orders (12 Ampegon & 13 ScandiNova) are placed and the Kick-off meetings took place. Contractual delivery dates: Nov 15Dec 16Jan 17Feb 17Mar 17Apr 17 Ampegon ScandiNova11335

C-band MHI deflectors (S03CB14.1) Page 12  PSI ordered two C-band deflecting cavities and related waveguides to MHI-MS  They will be ready for commissioning in October 2016  The two deflecting cavities will be powered by the last station of Linac3 using an high power RF switch  The waveguide switch is provided by Nihon Koshua  The power test of the switch is in progress Last module in Linac3 (S03CB13) Deflecting cavities (S03CB14.1)

 RF Gun – 1 week  SINSB – 2 weeks: operation at 10 Hz, conditioning at 100 Hz, RI structures never run at 100 Hz and nominal power  SINXB01 – 2 week for 10 Hz operation  SINDI01 – 1 week for 10 Hz operation  S01CB01  functional test – 2 months  S01CB02  from Jan  S10CB03–07, S30CB01–04  Jan – May 17  S30CB14.1 (deflector)  S10CB08–09, S20CB01–04, S30CB05–13 RF conditioning Page 13

 Energy gains against timing  Energy gains against temperature of the accelerating structures  Functional tests of the S01CB01 module with beam  Tuning of the RF parameters  Dark current measurements System commissioning with beam Page 14