International Workshop on Breakdown Science and High Gradient Technology (HG2015)

16 Jun 2015, 08:00 → 19 Jun 2015, 20:10 Asia/Shanghai

Jinchunyuan Guest House (Tsinghua University)

Gerardo D'Auria (Elettra Trieste), Jiaru Shi (Tsinghua University), Sami Tantawi (SLAC), Toshiyasu Higo (KEK), Walter Wuensch (CERN), Wei Gai (Argonne National Laboratory)

The eighth workshop on high-gradient acceleration, HG2015, will be hosted this year by the Tsinghua University.

High-gradient rf and X-band is now being used for a wide, and expanding, variety of accelerator applications. The objective of this workshop is to bring together the different high-gradient rf and X-band communities in order to advance the field by sharing knowledge and experience.

The workshop will cover applications, experiments, simulations, technology and theory through presentations, discussions and a poster session in a format similar to past HGs.

We look forward to seeing past participants again but also those new to the field!

The web pages of the previous workshop, hosted by Trieste, can be found at http://indico.cern.ch/event/231116/overview.

Tuesday, 16 June

08:00 → 08:50 Registration

Registration

08:50 → 09:00 Welcome

Welcome

08:50 Welcome

Speaker: Prof. Chuanxiang Tang

09:00 → 10:35 High Gradient Results: I

Convener: Prof. Chuanxiang Tang

09:00 High Gradient results of NLC/JLC structures

Speaker: Dr Juwen Wang (SLAC)

Slides HG2015_High_Gradient_NLC&JLC_Juwen_Wang.pptx

09:25 High gradient study on CLIC prototype structures

Speaker: Toshiyasu Higo (KEK)

Slides High_gradient_test_of_CLIC_prototype_structures_Higo.pptx

09:50 Data Analysis of T24_THU#1 test results

Speaker: Xiaowei Wu (Tsinghua University (CN))

Slides High_gradient_test_of_CLIC_prototype_structures_Higo&Wu.pptx

10:10 Preliminary results of high power tests of normal conducting cryo cavity

Speaker: Dr Valery Dolgashev (SLAC)

cryo_HG2015_V2229_14Jun2015.pdf

10:35 → 10:55 Coffee Break

10:55 → 12:35 High Gradient Results: II

Convener: Walter Wuensch (CERN)

10:55 Experimental determination of the effect of beam loading on breakdown rate

Speaker: Luis Navarro (CERN)

Slides Experimental_determination_of_the_effect_of_beam_loading_on_breakdown_rate_Luis_NAVARRO.pptx

11:20 High gradient testing of the CLIC crab cavity

Speakers: Ben Woolley (CERN), Benjamin Woolley (Lancaster University)

Slides High_gradient_testing_of_the_CLIC_crab_cavity.pdf High_gradient_testing_of_the_CLIC_crab_cavity.pptx

11:45 C-Band Result from SINAP

Speaker: Wencheng Fang (Shanghai Institute of Applied Physics)

Slides C-band_for_HG2015.pdf C-band_for_HG2015.pptx

12:10 Design and Test of Damped/High Gradient/High Repetition Rate C-Band Accelerating Structures for the ELI-NP LINAC

Speaker: Dr David Alesini (LNF-INFN)

Slides Design_and_Test_of_Damped_High_Gradient_High_Repetition_Rate_C-Band_Accelerating_Structures_for_the_ELI-NP_LINAC_David_Alesini.pdf Design_and_Test_of_Damped_High_Gradient_High_Repetition_Rate_C-Band_Accelerating_Structures_for_the_ELI-NP_LINAC_David_Alesini.pptx

12:35 → 14:00 Lunch

14:00 → 15:40 Klystrons and Test Stands

Convener: Yunlong Chi (IHEP)

14:00 High-efficiency klystron development - HEIKA

Speaker: Igor Syratchev (CERN)

Slides High-efficiency_klystron_development_-_HEIKA_Igor_Syratchev.pdf High-efficiency_klystron_development_-_HEIKA_Igor_Syratchev.pptx

14:25 Klystron development in CETC

Speaker: Kairong Chu (CETC)

Slides Klystron_development_in_CETC_Kairong_Chu.pdf Klystron_development_in_CETC_Kairong_Chu.ppt

14:50 CLIC Xboxes - status and plans

Speaker: Dr Nuria Catalan Lasheras (CERN)

Slides CLIC_Xboxes_-_status_and_plans_Nuria_Catalan_Lasheras.pdf CLIC_Xboxes_-_status_and_plans_Nuria_Catalan_Lasheras.pptx

15:15 Experience with X-band klystrons and solid state modulators at CERN

Speaker: Gerard Mcmonagle (CERN)

Slides Experience_with_X-band_klystrons_and_solid_state_modulators_at_CERN_Gerard_Mcmonagle.pdf Experience_with_X-band_klystrons_and_solid_state_modulators_at_CERN_Gerard_Mcmonagle.pptx

15:40 → 16:10 Coffee Break

16:10 → 17:50 High Gradient Results: III

Convener: Wencheng Fang (Shanghai Institute of Applied Physics)

16:10 Breakdown tests of 100 GHz accelerating structures

Speaker: Dr Valery Dolgashev (SLAC)

16:35 High gradient wakefield at W-band based on intense electron bunch train

Speaker: Dan Wang

Slides High_Power_RF_Generation_at_W-band_Based_on_Wakefields_Excited_by_Electron_Bunch_Train_Dan_Wang.pdf High_Power_RF_Generation_at_W-band_Based_on_Wakefields_Excited_by_Electron_Bunch_Train_Dan_Wang.pptx

17:00 The nanosecond diagnostic and analysis of microwave-driven window breakdown

Speaker: Dr Chao Chang

Slides The_nanosecond_diagnostic_and_analysis_of_microwave-driven_window_breakdown_Chao_Chang.pdf The_nanosecond_diagnostic_and_analysis_of_microwave-driven_window_breakdown_Chao_Chang.ppt

17:25 The macroscopic field emission

Speaker: Dr Faya Wang

Slides The_macroscopic_field_emission_Faya_Wang.pdf The_macroscopic_field_emission_Faya_Wang.pptx

Wednesday, 17 June

08:30 → 10:10 HG Applications and Projects: I

Convener: Igor Syratchev (CERN)

08:30 High Gradient at SLAC

Speaker: Valery Dolgashev (SLAC)

High Gradient at SLAC Tantawi HG2015 14Jun2015.pdf

08:55 CLIC high-gradient and X-band directions

Speaker: Walter Wuensch (CERN)

Slides HG_overview_2015-6-16.pdf HG_overview_2015-6-16.pptx

09:20 The XbFEL collaboration

Speaker: Dr Gerardo D'Auria (Elettra Trieste)

Slides 3、GdA_HG2015.pdf 3、GdA_HG2015.ppt

09:45 Sinap XFEL

Speakers: Zhentang Zhao (Shanghai Institute of Applied Physics), qiang gu (sinap)

Slides 4、Status_of_the_SXFEL_project.pdf 4、Status_of_the_SXFEL_project.pptx

10:10 → 10:40 Coffee Break and Workshop Photo

10:40 → 12:20 HG Applications and Projects: II

Convener: Gerardo D'Auria (Elettra Trieste)

10:40 Electron imaging in HEDP

Speaker: Dr Wei Gai (Argonne National Laboratory)

Slides 5、hg-2015-wgai.pdf 5、hg-2015-wgai.pptx

11:05 Compact Thomson Source at Tsinghua

Speaker: Prof. Wenhui Huang (Tsinghua University)

Slides 6、Thomson_Scattering_X-ray_Source_at_Tsinghua_University.pdf 6、Thomson_Scattering_X-ray_Source_at_Tsinghua_University.pptx

11:30 Short Pulse RF Generation and Two Beam Acceleration at AWA

Speaker: Chunguang Jing (Euclid Techlabs / Argonne National Laboratory)

Slides 7、AWA_Jing_HGworkshop__Tsinghua_2015.pdf 7、AWA_Jing_HGworkshop__Tsinghua_2015.pptx

11:55 Status and progress of DDS structures, and on Novel TBA Concepts

Speakers: Roger Jones (Univ Manchester/Cockcroft Inst.), Roger Jones (Lancaster University (GB))

Slides Tsinghua_Uni_RMJ_HG2015_Talk.pdf Tsinghua_Uni_RMJ_HG2015_Talk.pptx

12:20 → 14:00 Lunch

14:00 → 18:00 Industral exhibition and poster session: with Lab tour in groups

14:00 [Poster] Dark Current Study in Photocathod RF Gun

Speaker: Lianmin Zheng

14:00 [Poster] Investigations of the symmetry in the input coupler of the X-band linac

Speaker: Congfeng Wu (USTC)

14:00 [poster] R & D status of C-band accelerating structure at IHEP

Speaker: Jingru Zhang (IHEP, China)

14:00 [Poster] RF study of a C-band barrel open cavity pulse compressor

Speaker: Guan Shu

14:00 [Poster] TBD

Speaker: RYUICHI KOBAYASHI

14:00 [Poster] TBD

Speaker: Luca GAROLFI

14:00 [Poster] TBD

Speaker: KAZUHIRO TAGI

14:00 [Poster] the comparison of MD and FEM simulations of tips on metal surfaces under a high electric field

Speaker: Mihkel Veske (University of Helsinki)

Veske_HG2015.pdf

14:00 [Poster] X-band linac with Continously-adjustable beam energy

Speaker: Liang Zhang (Tsinghua University)

14:00 Mitsubishi Materials Corporation

14:00 ScandiNova Systems AB

14:00 SH Copper Products Co., Ltd.

14:00 Toshiba Electron Tubes & Devices Co., Ltd

14:00 VDL Enabling Technologies Group Switzerland AG

Thursday, 18 June

08:30 → 10:10 RF design: I

Convener: Toshiyasu Higo (KEK)

08:30 Mobile X-band Electron Linac Neutron Source s for Fukushima(1F) Accident Analysis

Speaker: Prof. Mitsuru Uesaka

Slides 1、Mobile_X-band_E_Linac_N_Sources_for_1F_Accident_Analysis_Uesaka_15.6.18.pptx

08:55 Optimization of the CLIC baseline structure

Speaker: Hao Zha (CERN)

Slides 2.HG2015-ZHA-HAO-New-CLIC-G-star-design.pptx

09:20 Wakefield monitors: simulations and bench measurements

Speaker: Natalia Galindo Munoz (CERN)

Slides 3.HG2015_NGalindo.pptx

09:45 FACET measurement of long-range transverse wakefields

Speaker: Hao Zha (CERN)

Slides 4.HG2015-ZHA-HAO-Wakefield-Measurement-of-CLIC-Structure.pptx

10:10 → 10:30 Coffee Break

10:30 → 11:45 RF design: II

Convener: Chao Chang

10:30 X-Band Compact Pulse Compression System and Studies on Dark Currents in the LCLS X-Band Deflectors

Speaker: Dr Juwen Wang (SLAC)

Slides 5.HG2015_Compact_SLED_and_Deflector_Dark_Current_Juwen_Wang.pptx

10:55 X-Band deflecting cavity at SINAP

Speaker: Jianhao Tan

Slides 6.X-band_deflecting_Structure_@_SINAP_Jianhao_Tan.pdf

11:20 ultra-compact high power variable RF switch

Speaker: Hao Zha (CERN)

Slides 7.HG2015-ZHA-HAO-power-splitter.pptx

11:45 → 13:00 Lunch

13:00 → 17:30 Factory Tour

17:30 → 20:30 Workshop dinner

Friday, 19 June

08:30 → 10:10 Fabrication: I

Convener: Nuria Catalan Lasheras (CERN)

08:30 Baseline fabrication procedure: review and recent developments

Speaker: Anastasiya Solodko (CERN)

Slides Baseline_fabrication_procedure.pdf Baseline_fabrication_procedure.pptx

08:55 Building open traveling wave structure

Speaker: Dr Valery Dolgashev (SLAC)

CLIC-G-OPEN_HG2015_V1947_11Jun2015.pdf

09:20 Production of C-band cavities and pulse compressor for Swissfel

Speaker: Riccardo Zennaro (PSI)

Slides 3、HG2015_Zennaro_.pptx

09:45 Development of X-band Structures at Tsinghua

Speaker: Jiaru Shi (Tsinghua University)

Slides 4、2015Jun18-HG-SHIJIARU-Xband_Tsinghua.pptx

10:10 → 10:40 Coffee break

10:40 → 12:20 Fabrication: II

Convener: Alexej Grudiev (CERN)

10:40 Achievements and status of activities on the electroformed X Band structures at INFN-LNF

Speakers: Bruno Spataro (INFN - LNF), Bruno Spataro (Istituto Nazionale Fisica Nucleare (IT))

Slides 5、Spataro_HG_2015.ppt

11:05 Fabrication and operating stability of the RFQs in J-PARC

Speaker: Takatoshi Morishita (J-PARC)

Slides 6、HG2015_morishita.pptx

11:30 RF Accelerating Cavity for SuperKEKB Damping Ring and its Breakdown Study

Speaker: Tetsuo Abe (High Energy Accelerator Research Organization (KEK))

11:55 3 GHz medical linac technology: high-gradient proton accelerating structure and rotary joint

Speaker: Alberto Degiovanni (CERN)

Slides 8、HG2015_1_3_GHz_medical_linac_technology.pptx

12:20 → 14:00 Lunch

14:00 → 15:40 High Gradient Results: IV

Convener: Wei Gai (Argonne National Laboratory)

14:00 Update on Multipactor Suppression of External Powered Dielectric Accelerators

Speaker: Chunguang Jing (Euclid Techlabs / Argonne National Laboratory)

Slides 1-DLA_Jing_HGworkshop__Tsinghua_2015_v1.pptx

14:25 Recent resuts from the CERN dc spark system

Speaker: Walter Wuensch (CERN)

Slides 2-HG_dc_2015-6-18.pptx

14:50 Analysis of conditioning and the statistics of breakdown

Speaker: Jorge Giner Navarro (Instituto de Fisica Corpuscular (ES))

Slides HG2015_RFconditioning_JGN_20150619_version4-3.pdf HG2015_RFconditioning_JGN_20150619_version4-3.pptx

15:15 Breakdown position analysis

Speaker: Alberto Degiovanni (CERN)

Slides 4-HG2015_2_Breakdown_position_analysis.pptx

15:40 → 16:00 Coffee break

16:00 → 17:15 Basic HG theory

Convener: Jiaru Shi (Tsinghua University)

16:00 Dark current and field emission study

Speaker: Mr Jiahang Shao

Slides 5-HG2015_v1.pptx

16:25 Long-term atomistic simulations of evolution of metal surfaces with and without an external electric field

Speaker: Ville Jansson (University of Helsinki)

16:50 Basic Study on High-Gradient Accelerating Structures at KEK / Nextef

Speaker: Tetsuo Abe (High Energy Accelerator Research Organization (KEK))

Slides 7-Basic_Study_at_Shield-B_ABE_2015-06-19.pptx

17:15 → 17:35 Closing

17:15 Closing remarks

Speaker: Prof. Chuanxiang Tang (Tsinghua University)

Slides HG2015-closing_remarks.pdf HG2015-closing_remarks.pptx