International Workshop on Breakdown Science and High Gradient Technology (HG2012 is an ICFA mini-workshop)

18 Apr 2012, 08:45 → 20 Apr 2012, 17:00 Japan

Kenkyuhonkan 1F Kobayashi Hall (KEK Tsukuba)

Dear Workshop Attendee I hope everybody enjoyed the workshop discussions at KEK last week. The workshop photo is now available at "Photos" https://indico.cern.ch/internalPage.py?pageId=11&confId=165513 In a concluding remark, I asked you as a chairman of the workshop that All the presenters, in oral and poster, are requested to send me a few sentences describing your perspective on your study in near future based on the discussions in the workshop. We also welcome your comment even though you have not presented in a formal manner. Please send your thought in a brief manner so that I compile those as one of the outcome of the workshop. The e-mail address is toshiyasu.higo@kek.jp or highgrad@ml.post.kek.jp Thank you again for contributing to the workshop to make it very successful and we hope this series of workshop will be expanded more, Toshi Higo (KEK) as a workshop chair

Wednesday, 18 April

08:30 Registration

1 Opening address

Speaker: Prof. Shin-ichi KUROKAWA

Slides Opening_Address_of_HB2012_120418.pdf Opening_Address_of_HB2012_120418.ppt

2 Status and objectives of the CLIC X-band activity

Speaker: Dr Walter Wuensch

Slides KEK_wuensch.pdf KEK_wuensch.pptx

3 Report from SLAC

Speaker: Dr S Tantawi

Slides 18AM_03_Tantawi-HGWS_at_Japan2012_15min.pdf 18AM_03_Tantawi-HGWS_at_Japan2012_15min.pptx

4 Nextef results ＆ status

Speaker: Dr Higo Toshiyasu

Slides Higo_Nextef_results_＆_status.pdf Higo_Nextef_results_＆_status.pptx

5 Discussion of workshop mission and information of practical issues

Slides Higo_Workshop_mission.pdf Higo_Workshop_mission.pptx

10:10 Coffee

6 Directions for CLIC structures: Lower energy machines and overview of damping alternatives

Speaker: Alexej Grudiev (CERN)

Slides Newdirections.pdf Newdirections.pptx

7 Choke mode structure development

Speaker: Dr Jiaru Shi

Slides 201204-SHI_Jiaru-Choke-HighGradientWS.pdf 201204-SHI_Jiaru-Choke-HighGradientWS.pptx

8 Overview of The Status of Higher Order Mode Suppression with a Damped Detuned Linac for CLIC: CLIC_DDS

Speaker: Dr Roger Jones

Slides RMJ_HG_WS_KEK_April_2012.pdf RMJ_HG_WS_KEK_April_2012.pptx

9 Discussion

11:40 Lunch

10 Breakdown Study on An L-band 5-Cell SW Structure

Speaker: Dr Faya Wang

Slides 18PM_01_Wang_HG2012-5cell_F.pdf 18PM_01_Wang_HG2012-5cell_F.ppt

11 Detuning of high-power tested structures - explained!

Speaker: Dr Jiaru Shi

Slides 201204-Detuning_during_high_power_testing.pdf 201204-Detuning_during_high_power_testing.pptx

12 Summary of progress towards CLIC goals and next steps

Speaker: Dr Steffen Doebert

Slides xbandcollaborationworkshopkek2012.pdf xbandcollaborationworkshopkek2012.ppt

13 High graidnet results from single-cell setup

Speaker: Dr Valery Dolgashev (SLAC)

Slides 18PM_04_SLAC_high_power_tests-Dolgashev_KEK_17Apr2012.pdf 18PM_04_SLAC_high_power_tests-Dolgashev_KEK_17Apr2012.ppt

14 Discussion

14:10 Coffee

15 The high power demonstration of the PETS ON/OFF operation

Speaker: Igor Syratchev (CERN)

Poster HGW__2012_poster.pdf HGW__2012_poster.ppt

Slides HGW_2012_talk.pdf HGW_2012_talk.pptx

16 Some interesting results and analysis from CTF3

Speaker: Mr Wilfrid Farabolini (CEA DAPNIA)

Slides Falabolini_Some_results_and_analysis_from_CTF3_-_WF_&_AP.pdf Falabolini_Some_results_and_analysis_from_CTF3_-_WF_&_AP.pptx

17 AWA high current beam for 10 - 100 GHz RF generations

Speaker: Dr Wei Gai (Argonne National Laboratory)

Slides HFHP_rf_generation_at_AWAkek-hgworkshop-2012.pdf HFHP_rf_generation_at_AWAkek-hgworkshop-2012.pptx

18 Discussion

19 Tour CFF (Superconducting Cavity Fabrication Facility)

Speaker: Kenji Ueno (KEK)

20 Tour Nextef (New X-band Test Facility)

Speaker: Dr Shuji Matsumoto (KEK)

17:30 Welcome Party

Thursday, 19 April

21 Atomistic approach in simulations of electrical breakdowns on metal surfaces

Speaker: Dr Flyura Djurabekova

Slides 19AM_01_Djurabekova_HG2012.pdf

22 State of 3D Vacuum Arc Discharge Simulation via PIC-DSMC

Speaker: Dr Matthew Hopkins

Slides 2012_KEK_Presentation.zip Hopkins_KEK_Presentation.zip

23 Recent computational results for rf breakdown mitigation

Speaker: Dr Zeke Insepov

Slides Insepov_4-19.pdf Insepov_4-19.ppt

24 Discussion

10:10 Coffee

25 20 K cold RF gun

Speaker: Dr Vladimir Vogel

Slides Vladimir_Vogel_ColdGun_HG2012.pdf

26 Operating experience of J-PARC RFQs

Speaker: Dr Yasuhiro Kondo

Slides Kondo_120419.pdf Kondo_120419.pptx

27 Ignition of unipolar arcing using nanostructured tungsten

Speaker: Dr Shin Kajita

Slides 19AM_06_Kajita.pdf 19AM_06_Kajita.ppt

28 Discussion

11:40 Lunch

Workshop Photo Session

29 Recent results from in situ field emission measurements in the SEM at Uppsala University

Speaker: Dr Tomoko Muranaka

Slides Muranaka120419HG12.pdf Muranaka120419HG12.ppt

30 Development of Field Emitter Scanner under SEM Observation

Speaker: Dr Shigeki Kato

Slides Shigeki_KATO_FES_KEK_HG2012.pdf

31 Field Emission Study inside an SEM

Speaker: Dr Lisa Laurent

Slides 19PM_03_Laurent_FE_Study_KEK_2012e.pdf 19PM_03_Laurent_FE_Study_KEK_2012e.pptx

32 Discussion

14:10 Coffee

33 3.6-cell RF Gun for LUCX

Speaker: Dr Masafumi Fukuda

Slides HG2012_mfukuda1.pdf

34 High gradient performance of RF gun and S-band accelerator structure for dark current reduction

Speaker: Dr Tsutomu Taniuchi

Slides 19PM_05_Taniuchi_HG2012.pdf 19PM_05_Taniuchi_HG2012.pptx

35 High gradient performance of C-band accelerator in SACLA

Speaker: Dr Takahiro Inagaki

Slides HG2012presen_Inagaki.pdf HG2012presen_Inagaki.pptx

36 Fabrication and Measurement Issues for High Gradient Test Accelerator Structures

Speaker: Dr Juwen Wang (SLAC)

Slides 19PM_07_Juwen_Wang_HG2012.pdf

Poster

slides

• P10_Syratchev_HGW__2012_poster.pdf
• P10_Syratchev_HGW__2012_poster.ppt
• P16_Poster_ArcPoster_Part1_2012-04_HT.pdf
• P16_Poster_ArcPoster_Part1_2012-04_HT.pptx
• P16_Poster_ArcPoster_Part2_2012-04_HT.pdf
• P16_Poster_ArcPoster_Part2_2012-04_HT.pptx
• P18_Poster_HG2012_POSTER_morishita.pdf
• Poster_session_120415.xlsx

Friday, 20 April

37 Precise machining of CLIC structure

Speaker: Sandrine LECUREUIL (MECACHROME FRANCE)

Slides 01_Precise_machining_of_CLIC_structure.pdf 01_Precise_machining_of_CLIC_structure.ppt

38 Manufacturability & industrialization (cont control, yield optimizaiton, cycle time improvement)

Speaker: Dr Hans PRIEM

Slides

• VDL_at_KEK_20_April_2012F.pdf
• VDL_at_KEK_20_April_2012F.pptx
• VDL_at_KEK_20_April_2012.pdf

39 Progress on TD24 accelerating structures fabrication and wakefield monitor experiment preparation

Speaker: Mr Franck Peauger (CEA - Centre d'Etudes de Saclay (FR))

Slides 03_Peauger_ACS-WFM_experiment-HG2012.pdf 03_Peauger_ACS-WFM_experiment-HG2012.pptx

40 Discussion

10:10 Coffee

41 Report on X-band klystron commissioning

Speaker: Jan Kovermann (III. Physikalisches Institut (B) - Rheinisch-Westfaelische Tech.)

Slides X-band-status.pdf X-band-status.pptx

42 Experience with X-band at FERMI@Elettra FEL

Speaker: Dr Geraldo D'Auria

Slides 05_GdA_HG2012_KEK.pdf 05_GdA_HG2012_KEK.ppt

43 10MW X-band klystron development (Mitsubishi electric or by Mitsuhiro Yoshida (KEK))

Speaker: Dr Kiyohiko Yoshida

44 Discussion

11:40 Lunch

45 Multi purpose X Band structure (fabrication, testing, first practical experiences)

Speaker: Dr Micha Dehler (PSI)

Slides HG2012.pdf HG2012.ppt

46 Commissioning of On-site Partial CT Evaluation of 950 keV and 3.95 MeV X-band linac X-ray sources

Speaker: Dr Mitsuru Uesaka

Slides

• 20PM_02_Uesaka_950keV3_95MeV24.4.20.pdf
• 20PM_02_Uesaka_950keV3_95MeV24.4.20.pdf
• 20PM_02_Uesaka_950keV3_95MeV24.4.20.pptx

47 X-band accelerator systems for medical and industrial applications

Speaker: Eiji Tanabe

Slides Tanebe_Medical_and_Industrial_Applications_of_Compact_X-Band_Accelerators(for_distribution).pdf

48 Discussion

14:10 Coffee

49 Chanlenges and Progress on high gradient dielectric structures

Speaker: Dr Jing Chunguang

Slides 20PM_04_DLA_Jing_HGworkshop__KEK_2012.pdf

50 Klystron-based X-band LC

Speaker: Radoje Belusevic (KEK)

Slides

• 20PM_05_Belusevic_Presentation_final.pdf
• 20PM_05_Belusevic_Presentation_final.pdf
• 20PM_05_Belusevic_Presentation_final.ppt

51 CLIC project perspective

Speaker: Steinar Stapnes (CERN)

Slides 20PM_06_Stapnes_CLIC-status-short.pdf 20PM_06_Stapnes_CLIC-status-short.pptx

52 Conclusion

Informal meeting