SCRF: Monthly WebEx Meeting Oct., 19, 2011 Report from PMs (15 min.) GDE activity/meeting plan Accelerator Systems: Technical Baseline Review (TBR) at DESY, Oct. 24-27, Preparation for ILC-PAC (SCRF R&D/System-tests and Industrialization), Nov. 14-15 Status of SCRF industrialization study Preparation for TTC meeting and a post-TTC meeting: GDE-SCRF meeting at IHEP, Dec. 5 - 9 Preparation for the SCRF Technical Baseline Review (TBR) at KEK, Jan. 19-20, Report from TA Group Leaders (15 min) Cavity Gradient R&D: R. Geng Cavity Integration: H. Hayano Cryomodule: P. Pierini Cryogenics: T. Peterson HLRF: S. Fukuda & C. Nantista ML Integration: C. Adolphsen Special Discussions (30 min.) TTC: Preparation for discussion on S1-Global progress (in WG-2: Cryomodule Tests) Post-TTC / SCRF meeting : GDE dedicated discussion for technical baseline for TDR and cost estimate SCRF Technical Baseline Review: Preparation for the meeting at KEK, Jan. 19-20. SCRF-110824 SERF WebEx Meeting

PM’s Action/Meeting Plan (2011-2012) Month Day Place Meeting Oct. 12-15 18 19 24-27 28 29 KEK, Tsukuba BN Web DESY GDE-CFS meeting, and discuss JP single tunnel design with DRFS, Visit BN, (w/ webex) Monthly SCRF meeting AS,BDS TBR AS-CFS meeting, Cost meeting Nov. 11 14-15 16 Munchen Prague CEA-Saclay Visit SST (EBW machine company) ILC-PAC Visit CEA/Saclay to discuss cryomodule assembly work Dec. 5-8 8-9 (14) Beijing (Web) TTC meeting ILC-GDE SCRF meeting (as a post TTC meeting) (Monthly meeting: probably to be replaced by the above meeting) 2012, Jan. 19-20 KEK Monthly meeting Industrial study meeting with AS/Japanese Industry SCRF TDR Preparation Review & WS Feb. 8 March 21 22-23 CERN CFS-Ams, EU review CFS TBR April 23-26 Korea ACFA-LCWG SCRF-110824 SERF WebEx Meeting

Gradient Yield in Progress reaching 60 % yield at 35 MV/m SCRF-110824 SERF WebEx Meeting

GDE-CFS team visited Japanese Geographically Candidate Sites Oct. 14,-15, 2011

Baseline Technical Reviews SCRF-110824 SERF WebEx Meeting

Status of Industrial Studies EU: Cavity industrialization study including facility by RI to be contracted through DESY Cryomodule assembly study under discussion with CERN and withBabcock-Noell Ams: Cavity industrialization study by AES to be contracted through Fermilab (by DOE), AS/Japan: Cavity industrialization study by MHI contracted through KEK Cryomodule assembly study by Hitachi contracted through KEK Conduction cooling quadrupole engineering study by Toshiba contracted through KEK SCRF-110824 SERF WebEx Meeting

TTC Meeting at IHEP, Dec. 5-8 General agenda: WG1: Cryomodule tests and analysis Focusing on the S1-Global test results and analysis WG2: Cavity material, fabrication, treatment and testing: new concepts and new benefits WG3: Cryogenics and cryostats: savings in coling power SCRF-110824 SERF WebEx Meeting

Technical Discussions on S1-Global Test Results at TTC, Dec. 5-8 Working Group 1: Cryomodule Test Results and Analysis Date: Dec. 6, (the second, full day) Sessions; 1 (2 hrs), 2 (1.5 hrs), 3 (1.5 hrs), 4 (1.5 hrs) Focusing on cryomodule RF tests and problems observed Cavity: Degradation of field gradient after cavity-string assembly Input coupler: discharge and excessive heat-load Tuner: LFD and control, and failure modes in operation Cavity-string: alignment process and monitoring/control (LHe jacket, magnetic shield and others) Notes and Request from TTC: Wider applications/projects to be covered ILC, FLASH/XFEL, NML, Cebaf, Spiral-2, … SCRF-110824 SERF WebEx Meeting

GDE-SCRF Meeting as a post-TTC meeting, Dec. 8-9 Based on the S1-Global test results, to; Discuss baseline technology for the ILC Technical Design Report and cost estimate Project-oriented Technology choice for costing base Subjects to be discussed: Plug-compatibility: boundaries to be established Tuner design for the TDR cost-estimate baseline Input coupler design for the TDR cost-estimate Cavity structure for alignment, and for adapting high-pressure code, S1-Global Report: to be finalized SCRF-110824 SERF WebEx Meeting

Our Direction for TDR-SCRF Operational cavity gradient : 31.5 MV/m +/-20 %, with sorting /grouping Prepare for cavity gradient degradation after cavity-string/cryomodule assembly, With assuming 10 % cryomodule to be degraded with a level of 20 % Cavity plug-compativility condition to be simplified Discussion to be necessary specially for beam flange, tuners and couplers Cryomodule configuration: 8 + (4+Q+4) + 8 cavity-string assembly as a baseline Further study required for periodicity of quadrupoles and cost effective assembly technology SCRF-110824 SERF WebEx Meeting

Preparation for SCRF Baseline Technical Review (BTR) Cavity gradient : Update of ILC cavity production and process recipe. Update of successful production yield definition/evaluation for production stage, including new parameters such as radiation, and …, 31.5 MV/m +/-20 %, with sorting, and requirements for HLRF Gradient degradation after installation into cryomodule Cavity Integration and Cryomodule assembly Delivery condition of cavity with LHe vessel, and necessary testing sequence and monitor, Plug-compatibility specially on, beam-flange, couplers and tuner, magnetic shield, Cost saving with 5K radiation-shield simplification, removal of 5 K shield at inter-connect. Acceptance criteria w/ He vessel, and test program (including high-pressure code) Cryomodule and HLRF configuration with single tunnel 8 + (4+Q+4) + 8 cavity-string assembly Split-yoke, conduction-cooled quadrupoles Cavity-string and cryomodule Test Warm conditioning of Input Coupler: before or after installation into the tunnel Cold performance test: How much fraction to be cold tested? Subjects to be tested? A. Yamamoto -110928 TDR ACC & SCRF Guidline

Continued Cryogenics HLRF ML Integration Location and the options of cryogenic systems Heat balance with thermal design harmonization with cryomodule HLRF KCS/DRFS/RDR-unit HLRF system configuration including backup power supply and utilities with the single tunnel design Marx generator? AC power with gradient spreads, Rescue/recovery plan against cavity degradation after installation into cryomodule, by using circulator and power distribution system, Optimizations for low-power and high-power option. Tunable power distbribution system ML Integration Beam dynamics Quadrupole/BPM periodicity, locations, alignment, and beam tunability, Bunch spacing limit specially on KCS (requirement of DR beam dynamics) Availability, reliability, and backup of cryomodules to be required A. Yamamoto -110928 TDR ACC & SCRF Guidline

How to prepare for TDR? Discussion during LCWS Further technical discussion in TTC, Dec. 5 - 8 ILC Specific discussion in post-TTC, Dec. 8-9, Consensus for TDR writing, BTR at KEK, Jan. 19 – 20, 2012 A. Yamamoto -110928 TDR ACC & SCRF Guidline

SCRF-110824 SERF WebEx Meeting

SCRF Procurement/Manufacturing Model ILC Host-Lab Technical Coordination for Lab-Consortium Regional Hub-Lab: A Regional Hub-Lab: E, & … World-wide Industry responsible to ‘Build-to-Print’ manufacturing Regional Hub-Lab: D Regional Hub-Lab: B Regional Hub-Lab: C: responsible to Hosting System Test and Gradient Performance Regional hub-laboratories responsible to regional procurements to be open for any world-wide industry participation : Technical coordination link : Procurement link SCRF-110824 SERF WebEx Meeting

Production Process/Responsibility Step hosted Industry Industry/Laboratory Hub-laboratory ILC Host-laboratory Regional constraint no yes Accelerator - Integration, Commissioning Accelerator sys. Integ. SCRF Cryomodule - Perofrmance Test Cold, gradient test As partly as hub-lab Cryomodule/Cavity - Assembly Coupler, tuner, cav-string/cryomoduleassmbly work Cryomodule component - Manufacturing V. vessel, cold-mass ... 9-cell Cavity - Performance Test 9-cell, end-group assembly, Chem-process, He-Jacketing Sub-comp/material - Production/Procurement Nb, Ti, specific comp. … Procurement SCRF-110824 SERF WebEx Meeting