4th Annual X-band Structure Collaboration Meeting

3 May 2010, 08:00 → 5 May 2010, 21:00 Europe/Zurich

BE Auditorium (Monday 03/05 and Wednesday 05/05) + Council Chamber (Tuesday 04/05) (CERN)

Sami Tantawi (SLAC), Toshiyasu Higo (KEK), Walter WUENSCH (CERN)

This international meeting will focus on the development program of the high-power X-band rf system – power generating PETS structures, waveguide network and high-gradient accelerating structures – for CLIC. Ongoing activities such as rf design, manufacturing, preparation, test areas, testing and data analysis will be covered in detail. The workshop will also address:

• Crucial feasibility tests are now underway and results will be reported and summarized. The impact of these results on rf design, manufacturing, preparation and the next steps for the high-power rf testing program will be considered.

• The requirements and design of subsystems such as vacuum, cooling and instrumentation must be established for the CLIC CDR which is being written in 2010. The current concepts will be described along with progress in design, simulation and testing.

• X-band accelerating structure are being developed for applications other than CLIC, such as X-FEL projects and medical accelerators. These developments will be described.

This meeting will be followed by a workshop on breakdown physics in the second half of the week (Breakdown Physics Workshop). Theory, simulation and experiments on high-power and high-gradient phenomenon in a number of fields will be discussed there.

Monday, 3 May

08:50 → 13:00 High Power Testing

08:50 Welcome

Speaker: Dr Walter WUENSCH (CERN)

Slides Introduction_X-band_2.pdf Introduction_X-band_2.pptx

09:00 Accelerating Structures at SLAC

Speaker: Chris Adolphsen (SLAC)

Slides Adolphsen_TD18_High_Power_Test_Final.pdf Adolphsen_TD18_High_Power_Test_Final.pptx

09:20 Discussion

09:30 High Gradient Test at Nextef

Speaker: Dr Shuji Matsumoto (KEK)

Slides High-gradientTestAtNextef.pdf High-gradientTestAtNextef.ppt

09:50 Discussion

10:00 Single cells and ASTA tests

Speaker: Dr Valery Dolgashev (SLAC)

Slides SLAC_High_Power_Tests_CERN_X-band_1404_2May2010.pdf SLAC_High_Power_Tests_CERN_X-band_1404_2May2010.pptx

10:20 Discussion

10:30 Coffee Break

11:00 PETS Testing Analysis

Speaker: Alessandro Cappelletti

Slides PETS_TESTING_ANALYSIS_2.pdf PETS TESTING ANALYSIS.pptx

11:20 Discussion

11:30 TERA 3 GHz High-Gradient cavity test

Speaker: Silvia Verdu Andres (TERA Foundation-Unknown-Unknown)

Slides VerduAndres_3GHzCavityTest_3May2010.pdf VerduAndres_3GHzCavityTest_3May2010.pptx

11:50 Discussion

12:00 Discussion on critical issues for testing: breakdown identification, preparation for test, procession protocol

Speaker: Toshiyasu Higo (KEK)

Slides Discussion_on_critical_issues_for_testing.pdf Discussion_on_critical_issues_for_testing.pptx

13:00 → 14:30 Lunch

14:30 → 18:30 Structure Design

14:30 X-band structures for FELs - low gradient version

Speaker: Prof. Sami Tantawi (SLAC)

Slides FEL_talk.pdf FEL_talk.pptx

14:50 X-band structures for FELs - high gradient version

Speaker: Chris Adolphsen (SLAC)

Slides Adolphsen_X-band_Applications.pdf Adolphsen_X-band_Applications.ppt

15:00 Discussion

15:10 DDS Design and Test Structure

Speaker: Prof. Roger Jones (University of Manchester)

Slides R_M_Jones_XBWS_CERN_May_10_Wakefield_Suppression.pdf R_M_Jones_XBWS_CERN_May_10_Wakefield_Suppression.ppt

15:30 Discussion

15:40 Choked structures

Speaker: Dian Yeremian (SLAC)

Slides Choked_structurs_Yeremian_3May2010-submitted_version.pdf Choked_structurs_Yeremian_3May2010-submitted_version.pptx

16:00 Discussion

16:10 Coffee Break

16:40 Choke mode cavity and Tsinghua plans

Speaker: Jiaru Shi

Slides Choke_May_workshop.pdf Choke_May_workshop.pptx

17:00 Discussion

17:10 Summary of accelerating structure rf design directions at CERN

Speakers: Alexej Grudiev (CERN), Walter WUENSCH (CERN)

Slides Test_Structure_summary_grudiev.pdf Test_Structure_summary_grudiev.pptx

17:30 Discussion

17:40 Dielectric PETS

Speaker: Dr Wei Gai (Argonne National Laboratory)

Slides DWPE_Development_at_ANL1.pdf DWPE_Development_at_ANL1.ppt

18:00 Discussion

Tuesday, 4 May

09:00 → 12:30 Calculation and Measurement

09:00 ACE3P codes applied to two-beam acceleration

Speaker: Arno Candel (SLAC National Accelerator Laboratory)

Slides XBand10_Candel_T3P.pdf XBand10_Candel_T3P.pptx

09:20 Discussion

09:30 PETS on/off and pulse propagation through two-beam rf network

Speaker: Alessandro Cappelletti

Slides CLIC_PETS_ON-OFF.pdf CLIC_PETS_ON-OFF.pptx

10:00 Discussion

10:10 Beam loading compensation

Speaker: Oleksiy Kononenko

Slides pulse_optimization.pdf pulse_optimization.ppt

10:30 Discussion

10:40 Coffee Break

11:10 Travelling wave structure tuning

Speaker: Jiaru Shi

Slides Tuning_of_Traveling_Wave_Structures.pdf Tuning_of_Traveling_Wave_Structures.pptx

11:30 Discussion

11:40 ACE3P - Code Capabilities and Recent Results

Speaker: Arno Candel (SLAC National Accelerator Laboratory)

Slides XBand10_Candel_ACE3P.pdf XBand10_Candel_ACE3P.pptx

12:00 Discussion

12:30 → 14:00 Lunch

14:00 → 16:00 Structure Production

14:00 Structure Engineering Design

Speaker: Alexandre Samoshkin (Joint Inst. for Nuclear Research (JINR))

Slides RF_Structures_Design.pdf RF_Structures_Design.pptx

14:20 Discussion

14:30 Manufacturing RF structures at CERN

Speaker: Dr germana riddone (CERN)

Slides GR-structure-production-20100504.pdf GR-structure-production-20100504.pptx

14:50 Discussion

15:00 SLAC Status in Accelerator Structures Production

Speaker: Dr Juwen Wang (SLAC)

Slides Juwen_Wang_4th_X-Band_May_2010.pdf Juwen_Wang_4th_X-Band_May_2010.pptx

15:20 Discussion

15:30 Material preparation and new ideas on quadrant fabrication

Speaker: Yasuo Higashi (KEK)

Slides 4th_X-band_Cillaboration_Meeting100504Higashi.pdf 4th_X-band_Cillaboration_Meeting100504Higashi.ppt

15:50 Discussion

16:00 → 16:30 Coffee Break

16:30 → 18:30 Subsystems (vacuum, cooling and instrumentation)

16:30 CLIC structure vacuum system and the dynamic vacuum challenge

Speaker: Mr Sergio Calatroni (CERN)

Slides DynamicVacuum-XBandWorkshop.pdf DynamicVacuum-XBandWorkshop.pptx

16:50 Discussion

17:00 Thermo-mechanical calculations for structures

Speakers: Risto Nousiainen (Helsinki Institute of Physics (HIP)-Unknown-Unknown), Dr germana riddone (CERN)

Slides Thermo-mechanical_calculations_for_structures.pdf Thermo-mechanical_calculations_for_structures.pptx

17:20 Discussion

17:30 CLIC rf diagnostics

Speakers: Mrs Alexandra Andersson, Alexej Grudiev (CERN)

Slides RF_diagnostic.pdf RF_diagnostic.pptx

17:50 Discussion

Wednesday, 5 May

08:30 → 12:30 High-Power Test Areas (Joint Session with CTF3 Collaboration meeting)

09:00 X-band and CTF3 meeting introduction

09:15 Nextef status and expansion plans

Speaker: Dr Shuji Matsumoto (KEK)

Slides NextefStatusAndExpansionPlansFinal.pdf NextefStatusAndExpansionPlansFinal.ppt

09:35 Discussion

09:45 NLCTA, ASTA and klystron area plans

Speaker: Prof. Sami Tantawi (SLAC)

Slides Summary_of_some_SLAC_Facilities2010.pdf Summary_of_some_SLAC_Facilities2010.ppt

10:05 Discussion

10:15 Coffee Break

10:45 CERN X-band test stand

Speaker: Karl-Martin Schirm (CERN)

Slides 12GHz_WS_052010.pdf 12 GHz Test Stand status

11:05 Discussion

11:15 TBTS - beams, structures and schedules

Speaker: Roger Ruber (University of Uppsala)

Slides CTF3-20100505_RR.pdf CTF3-20100505_RR.ppt

11:35 Discussion

11:45 X-Band testing schedule and program

Speaker: Steffen Doebert (CERN)

Slides structuretestsingprogcollabmeet.pdf structuretestsingprogcollabmeet.ppt

12:05 Discussion

12:30 → 14:00 Lunch

18:30 → 21:00 Welcome Drink