Report of TTC-TB Meeting at CEA Saclay 2016

Co-chaired by Wolf-Dietrich Moeller (DESY) and Eiji Kako (KEK), the TTC-TB meeting at CEA Saclay on July 8, 2016, discussed topics like WG organization, member lists, and integration operations. The meeting outlined discussions, proposed WG organization, and recognized members like J. Mammosser and M. Ross. The Scientific Program Committee held multiple meetings to plan sessions on performance, accelerators, and more.

• TTC-TB meeting
• CEA Saclay
• Wolf-Dietrich Moeller
• Eiji Kako
• WG organization

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1. Report of TTC-TB meeting at CEA-Saclay 2016, July 08 Co-chairs Wolf-Dietrich Moeller (DESY) Eiji Kako (KEK) W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 1

2. Outline Member list Discussions Proposal of WG-organization in the next TTC Topics for in-depth discussion in the next TTC Others W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 2

3. TTC-TB member list Honoris causa J. Mammosser (SNS) C. Pagani (INFN) M. Ross (SLAC) RF and tuning M. Champion (SNS) P. McIntosh (STFC) Co-chairs E. Kako (KEK) W.-D. Moeller (DESY) Cavity and couplers S. Bousson (CNRS-Orsay) S. Calatroni (CERN) G. Ciovati (Jlab) R.L. Geng (JLab) C. Ginsburg (FNAL) J. Hao (PKU) R. Laxdal (TRIUMF) D. Reschke (DESY) A. Romanenko (FNAL) K. Umemori (KEK) J.Y. Zhai (IHEP) H. Weise (DESY) A. Yamamoto (CERN/KEK) S. Belomestnykh (FNAL) Cryomodule and cryogenics C. Madec (CEA) H. Nakai (KEK) T. Peterson (FNAL) P. Pierini (INFN) Integration and operation H. Hayano (KEK) Sang-Ho Kim (SNS) M. Liepe (Cornell) S. Schreiber (DESY) Black = participant (15) Gray = absence (14) Total = 29 (EU=10, NA=12, Asia=7) New member; A. Romanenko (FNAL) W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 3

4. WG-organization in TTC at CEA-Saclay Scientific Program Committee meeting by Webex remote system ; (SPC members; Catherine, Hasan, Paolo, Wolf-Dietrich, Kako) 1st SPC meeting, 2016 April 13th 2nd SPC meeting, 2016 April 27th 3rd SPC meeting, 2016 May 11th 4th SPC meeting, 2016 May 25th 5th SPC meeting with WG conveners, 2016 June 1st 6th SPC meeting with WG conveners, 2016 June 8th 7th SPC meeting with WG conveners, 2016 June 15th 8th SPC meeting with WG conveners, 2016 June 22nd 9th SPC meeting with WG conveners, 2016 June 29th Two parallel sessions: 4 WGs WG1: Performance degradation and cure L. Lilje (DESY), J. Mammosser (ORNL), H. Sakai (KEK) WG2: Proton and ion accelerators G. Devanz (CEA), P. Michelato (INFN), R. Laxdal (TRIUMF) WG3: High current and CW accelerators E. Jensen (CERN), S. Belomestnykh (FNAL), J. Hao (PKU) WG4: Performance frontier S. Aull (CERN), A. Grassellino (FNAL), K. Umemori (KEK) W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 4

5. WG-organization in TTC at CEA-Saclay Scientific Program Committee meeting by Webex remote system ; (SPC members; Catherine, Hasan, Paolo, Wolf-Dietrich, Kako) 1st SPC meeting, 2016 April 13th 2nd SPC meeting, 2016 April 27th 3rd SPC meeting, 2016 May 11th 4th SPC meeting, 2016 May 25th 5th SPC meeting with WG conveners, 2016 June 1st 6th SPC meeting with WG conveners, 2016 June 8th 7th SPC meeting with WG conveners, 2016 June 15th 8th SPC meeting with WG conveners, 2016 June 22nd 9th SPC meeting with WG conveners, 2016 June 29th Thanks Catherine for strong leadership !! Two parallel sessions: 4 WGs WG1: Performance degradation and cure L. Lilje (DESY), J. Mammosser (ORNL), H. Sakai (KEK) WG2: Proton and ion accelerators G. Devanz (CEA), P. Michelato (INFN), R. Laxdal (TRIUMF) WG3: High current and CW accelerators E. Jensen (CERN), S. Belomestnykh (FNAL), J. Hao (PKU) WG4: Performance frontier S. Aull (CERN), A. Grassellino (FNAL), K. Umemori (KEK) W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 5

6. WG-organization in TTC at CEA-Saclay Scientific Program Committee meeting by Webex remote system ; (SPC members; Catherine, Hasan, Paolo, Wolf-Dietrich, Kako) 1st SPC meeting, 2016 April 13th 2nd SPC meeting, 2016 April 27th 3rd SPC meeting, 2016 May 11th 4th SPC meeting, 2016 May 25th 5th SPC meeting with WG conveners, 2016 June 1st 6th SPC meeting with WG conveners, 2016 June 8th 7th SPC meeting with WG conveners, 2016 June 15th 8th SPC meeting with WG conveners, 2016 June 22nd 9th SPC meeting with WG conveners, 2016 June 29th Thanks Catherine for strong leadership !! Two parallel sessions: 4 WGs WG1: Performance degradation and cure L. Lilje (DESY), J. Mammosser (ORNL), H. Sakai (KEK) WG2: Proton and ion accelerators G. Devanz (CEA), P. Michelato (INFN), R. Laxdal (TRIUMF) WG3: High current and CW accelerators E. Jensen (CERN), S. Belomestnykh (FNAL), J. Hao (PKU) WG4: Performance frontier S. Aull (CERN), A. Grassellino (FNAL), K. Umemori (KEK) Thanks to WG conveners !! W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 6

7. Suggestions for in-depth discussion from TTC-SLAC Final installation/first commissioning of XFEL modules. XFEL: injector operation, all modules tested in AMTF and warm commissioning by next meeting. Maybe good idea to move over next meeting as we ll have much more data! First cooling test of CW modules of LCLS-II. Operational experience; degradation in cryomodule during operation, how to cure and/or deal with. Again, there will not be much more data High power HOM dampers (> 3kW) and fundamental power couplers (CW > 300kW). Particle-free vacuum components next to cold Linac sections. Strategies, experience from different labs/projects on design/assembly/integration of diagnostic sections close to SRF. Working group on system integration, but it will make sense for the meeting after next, where we will have the XFEL experience. W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 7

8. WG-organization in previous TTC meeting Location Date Participants Parallel WGs CEA-Saclay 2016, July 127 2-para. 4 WG SLAC 2015, Dec. 130 2-para. 4 WG KEK 2014, Dec. 108 2-para. 4 WG DESY 2014, Mar. 129 3-para. 9 WG JLab 2012, Nov. 154 plenary 4 WG IHEP 2011, Dec. 96 plenary 3 WG W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 8

9. Proposal of WG-organization in the next TTC where & when of the next TTC meting is not decided. To be determined .. W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 9

10. Topics for in-depth discussion in the next TTC Cryogenics, module-design, module -integration, procedures @low and high beta Low beta cavity treatment and assembly Common WGs for low and high beta MSU module performance XFEL commissioning & performance, beam operation LCLS2 module prototype results (Q, tuner, couplers ) High ISOLDE beam operation High Q and high gradient follow-up Performance degradation and cure follow-up W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 10

11. Thank you for your attention. W.-D. Moeller (DESY) E. Kako (KEK) TTC-TB meeting at CEA, 2016' July 08 11