Welcome and the ATF2 international collaboration in future 1.Introduction 2.Mission of ATF/ATF2 3.Organization of ATF/ATF2 4.International Collaboration Board (ICB) 5.System/Group Coordinators (SGCs) 6.ATF2 International Collaboration in Future Present Research programs at ATF 7. Present Research programs at ATF Which way is preferable, Baseline 8. Which way is preferable, Baseline or Optimal. 9. Comparison of three timelines 10. Conclusion

The Memorandum of Understanding for the ATF International Collaboration ATF MoU-Draft May 24 （ will be combined ATF2 and present ATF into strong ATF.) Research programs at ATF and ATF2 for beam sources, damping rings, beam focusing and beam instrumentation Research programs at ATF and ATF2 for beam sources, damping rings, beam focusing and beam instrumentation ATF is expected to make a major contribution in above area by providing the ultra-low emittance beam for beam focusing studies and so on. ATF is expected to make a major contribution in above area by providing the ultra-low emittance beam for beam focusing studies and so on. To yield the maximum amount of scientific and technical outputs as well as to promote formation of the healthy international collaborative relationship among all the participants. To yield the maximum amount of scientific and technical outputs as well as to promote formation of the healthy international collaborative relationship among all the participants.

2.Mission of ATF/ATF2 ATF, to establish the technologies associated with producing the electron beams with the quality required for ILC and provide such beams to ATF2 in a stable and reliable manner. ATF, to establish the technologies associated with producing the electron beams with the quality required for ILC and provide such beams to ATF2 in a stable and reliable manner. ATF2, to use the beams extracted from ATF at a test final focus beamline which is similar to what is envisaged at ILC. The goal is to demonstrate the beam focusing technologies that are consistent with ILC requirements. For this purpose, ATF2 aims to focus the beam down to a few tens of nm (rms) with a beam centroid stability within a few nm for a prolonged period of time. ATF2, to use the beams extracted from ATF at a test final focus beamline which is similar to what is envisaged at ILC. The goal is to demonstrate the beam focusing technologies that are consistent with ILC requirements. For this purpose, ATF2 aims to focus the beam down to a few tens of nm (rms) with a beam centroid stability within a few nm for a prolonged period of time. Both the ATF and ATF2, to serve the mission of providing the young scientists and engineers with training opportunities of participating in R&D programs for advanced accelerator technologies. Both the ATF and ATF2, to serve the mission of providing the young scientists and engineers with training opportunities of participating in R&D programs for advanced accelerator technologies.

3.Organization of ATF/ATF2

The SP serves the following tasks: Direct and coordinate the work required at ATF/ATF2 in accordance with the ATF Annual Activity Plan, which outlines the activity plans of ATF/ATF2 including the budget and beamtime allocation for each Japanese fiscal year. Report the progress made by the collaboration to the ICB and the director of KEK. Report the matters related to KEK budget and KEK properties to the director of KEK. Deputies Deputy1:Hardware maintenance, Deputy2:Beam operation, and Deputy3:Design, construction and commissioning of ATF2.

4.International Collaboration Board (ICB) The International Collaboration Board (ICB) is the decision making body for the executive matters related to the ATF collaboration. The International Collaboration Board (ICB) is the decision making body for the executive matters related to the ATF collaboration. The appointment of the ICB members is based on recommendations from relevant research institutes in each area and approval by the director of KEK. The ICB may revise or expand its member composition, as deemed appropriate, when more universities or research institutes join the collaboration in the future. The appointment of the ICB members is based on recommendations from relevant research institutes in each area and approval by the director of KEK. The ICB may revise or expand its member composition, as deemed appropriate, when more universities or research institutes join the collaboration in the future.

The ICB serves the following tasks – Nominate the Spokesperson (SP) of the ATF collaboration. Nominate the Spokesperson (SP) of the ATF collaboration. Approve the appointment of the Deputies and System/Group Coordinators of important subsystems or subprograms. Approve the appointment of the Deputies and System/Group Coordinators of important subsystems or subprograms. Review and approve the ATF Annual Activity Plan. Review and approve the ATF Annual Activity Plan. Receive the reports from the SP, as found appropriate, and oversee the progress made by the collaboration. Receive the reports from the SP, as found appropriate, and oversee the progress made by the collaboration. Approve the new membership and withdrawals of collaborating institutes. Approve the new membership and withdrawals of collaborating institutes. Help communicate the progress being made at ATF with members of the home institutes. Help communicate the progress being made at ATF with members of the home institutes.

5.System/Group Coordinators (SGCs) The System/Group Coordinators will be appointed by the Spokesperson with an approval of ICB. The System/Group Coordinators will be appointed by the Spokesperson with an approval of ICB. The appointment of the System/Group Coordinators shall be made in a manner consistent with the ATF Annual Activity Plan. The appointment of the System/Group Coordinators shall be made in a manner consistent with the ATF Annual Activity Plan. The System/Group Coordinators will coordinate the tasks charged to the assigned Systems or Groups, and will assist the Spokespersons and the Deputies coordinate the ATF/ATF2 research programs. The System/Group Coordinators will coordinate the tasks charged to the assigned Systems or Groups, and will assist the Spokespersons and the Deputies coordinate the ATF/ATF2 research programs. In case of small study groups with less than 5 members, the Spokesperson or the Deputies may assume the role of its Coordinator on an acting basis.

6.ATF2 International Collaboration in Future StaFF : Stabilization of the Final Focus of the ILC StaFF : Stabilization of the Final Focus of the ILC CSR Study in Damping Ring CSR Study in Damping Ring Positron Generation based on Laser Compton Scattering in Damping Ring ? Positron Generation based on Laser Compton Scattering in Damping Ring ? Gamma Collider Study ? Gamma Collider Study ? Photon Nucleon Collision ? Photon Nucleon Collision ?

7.Present Research programs at ATF 1. Pol. Positron generation R&D at EXT 1. Pol. Positron generation R&D at EXT 2. Laser wire R&D in Damping Ring 2. Laser wire R&D in Damping Ring 3. High quality electron beam generation by photo-cathode RF Gun 3. High quality electron beam generation by photo-cathode RF Gun 4. X-SR Monitor R&D 4. X-SR Monitor R&D 5. ODR R&D 5. ODR R&D 6. Beam Based Alignment R&D 6. Beam Based Alignment R&D 7. Nano-BPM project of SLAC, LLNL and LBNL 7. Nano-BPM project of SLAC, LLNL and LBNL 8. Nano-BPM project of KEK 8. Nano-BPM project of KEK 9. FONT project 9. FONT project 10. Laser Wire project at EXT 10. Laser Wire project at EXT 11. Fast Kicker Development project 11. Fast Kicker Development project 12. Fast Ion Instability Research 12. Fast Ion Instability Research 13. Multi-bunch Instability Study 13. Multi-bunch Instability Study

8.Which way is preferable, Baseline or Optimal.

9.Comparison of three timelines.

10. Conclusion In May 28 meeting on International Collaboration for ATF2, the participant’s rough consensus points to Optimum beamline layout to go with Timeline 3 (or 2). Participant’s preference appears not to delay the report completion schedule (i.e. mid-June, BDIR WS), but how practically to achieve it remained an open issue. In May 28 meeting on International Collaboration for ATF2, the participant’s rough consensus points to Optimum beamline layout to go with Timeline 3 (or 2). Participant’s preference appears not to delay the report completion schedule (i.e. mid-June, BDIR WS), but how practically to achieve it remained an open issue. We take a two-part approach to completing the ATF2 report. We take a two-part approach to completing the ATF2 report. Part １ : Complete by BDIR WS in June, including the scientific goals, project deliverables, outlines of the technical designs, what need to be built. Part 2: Complete by Nano-beam WS in October, including the timelines, work packages, task sharing, collaboration structure, project management.