1. Brian Foster - LCUK Lancaster 1 Summary of UK meetings and general LC world situation Brian Foster Oxford Summary of Steering Committee and Collaboration Council. Report on world-wide developments since last LCUK Outlook Lancaster June 30 th, 2004

2. Brian Foster - LCUK Lancaster 2 LCUK Summary Many thanks to everyone who read and commented on our submission to the Treasury on the 10-year forward look for science. It was submitted on time. Most of the items discussed at the Steering Committee and Collaboration Council will be discussed in the main body of the report. Lord Sainsbury visited SLAC on June 8 th and spent about three hours there, visiting the accelerator test labs., the BaBar control room and the synchrotron radiation lab. He was very engaged and positive and he had a 10 minutes private conversation with J. Dorfan. Reports back from his private office said the visit was very successful.

3. Brian Foster - LCUK Lancaster 3 LCUK Summary We spent considerable time discussing the CLIC situation both in the Steering Committee and the Collaboration Council. There was representation from the UK at the special meeting called by the DG to ask for member state input into CLIC R&D, but PPARC do not have any resources for this at the moment. It is in any case essential that CLIC is not used as a “spoiler” for the 1 TeV LC; but equally, in the long term, CLIC technology may provide a route to Multi-TeV energies. The next LCUK meeting will be on December 21 st, at Imperial College (tbc).

4. Brian Foster - LCUK Lancaster 4 ICFA & ILCSC actions ICFA met in Paris in March and welcomed the January 2004 OECD Ministerial Statement on International Cooperation on Large Accelerator-based Projects in High-Energy Physics. It reaffirmed its conviction that the highest priority for a new machine for particle physics is a linear electron-positron collider with an initial energy of 500 GeV, extendible up to about 1 TeV, with a significant period of concurrent running with the LHC.” M. Tigner’s term as Chair of ILCSC was extended until 31.12.04. A successor will be discussed in August.

5. Brian Foster - LCUK Lancaster 5 ICFA & ILCSC actions ILCSC meeting in Paris mostly discussed the Ozaki report on the Global Design Initiative (GDI). The report had been agreed by the Ozaki panel consisting of Ozaki, Dorfan, Foster, Namkung, Totsuka, Wagner. GDI planned to evolve from a first stage in which the work mostly goes on in the regions and is an extension of the current work going on in the major labs, with central coordination by the GDI staff led by a Director supported by 3 regional directors and a staff of around 20 – 30. GDI will be established as soon as ICFA have ratified the ITRP technology recommendation that will develop the chosen technology and coordinate and lead the remaining required R&D to produce a CDR and then TDR. In the later stages, as we approach the final TDR, governments will be formally associated with the endeavour.

6. Brian Foster - LCUK Lancaster 6 GDI organisation First phase:

7. Brian Foster - LCUK Lancaster 7 GDI organisation Second phase:

8. Brian Foster - LCUK Lancaster 8 ICFA & ILCSC actions In the discussion of the report, the ILCSC also discussed the implementation. It agreed that it would invite bids from suitable sites, either particle or nuclear physics laboratories, to host the GDI. An evaluation panel will be appointed, with two people selected by each of the three regional steering groups. The panel will be given a charge and bidder requirements. The announcement of the venue not be made before the technology selection is announced. Some labs may bid as the venue only if a specific technology is chosen, but such bids will be rated lower than bids made irrespective of technology choice. It was commented that appropriate access to the host site is an important criterion. The panel will produce a list of sites grouped into broad categories, e.g. acceptable, highly acceptable etc, for the ILCSC, which will make a selection and report it to ICFA.

9. Brian Foster - LCUK Lancaster 9 ICFA & ILCSC actions It was also agreed that an informal search committee would be set up to consider names for the Director of the GDI. The search committee would consist of the Directors of the major labs on ILCSC, i.e. Aymar, Dorfan, Totsuka, Wagner, Witherell. It is clear that there is significant linkage between the choices of Director, Site and Technology. It was agreed that these choices would be linked as far as is possible without making a decision impossible. The CCLRC bid for the GDI site was submitted to ICFA yesterday.

10. Brian Foster - LCUK Lancaster 10 ITRP progress After initial exploratory meeting at RAL, ITRP visit schedule has been intensive: DESY and TESLA on 5/6 April 2004; 3rd meeting: SLAC26/27 April 4th meeting:KEK25/26 May 5th meeting: Caltech 28/30 June 6th meeting: Korea 11/13 August Homework given to both technology proponents: answering ~ 34 questions Topics Common LC technology comparison related questions Cost and Schedule related questions

11. Brian Foster - LCUK Lancaster 11 ITRP progress The feedback I have had is that the visits have gone very well, both technologies look rather impressive and that the committee are going to have a difficult job. However, they are working very well together and seem determined to come to a decision by the summer if at all possible. Certainly that is the view of the chairman. The current meeting is looking at implications from the detector point of view of the technology choice and will have a preliminary discussion of conclusions, with an aim to come to the final decision in the August meeting in South Korea, which can then be communicated to the Beijing meeting of ILCSC and ICFA.

12. Brian Foster - LCUK Lancaster 12 Technology progress Cold design: synergy with X-FEL. planned LC Site chosen to make maximum use of DESY infrastructure to avoid interference XFEL/LC Preparation of legal approval ‘Staatsvertrag’ in preparation

13. Brian Foster - LCUK Lancaster 13 Technology progress AC70: gradient of 39.4 MV/m at 2K using EP at DESY not treated at 1400 C High gradients is a high priority item at DESY and in TESLA collab. Test of 1/8th of a TESLA cryomodule at 5 Hz, 500  s fill, 800  s flat-top ->35 MV/m with no interruption related to cavity- coupler-klystron for more than 1000 hours No field emission One cavity installed in TTF and has reached without problems 35 MV/m with beam TESLA cavity progress.

14. Brian Foster - LCUK Lancaster 14 Other events By the CERN convention, CERN Council is supposed to take a view of particle physics in Europe, as well as the CERN lab. This function has rather withered away in the intervening 50 years; it is now being re-animated, although in my view the changes in procedure necessary to make this work have not yet been discussed or agreed. Council have had several discussions on LC-related issues. An important step is that a Council meeting outside CERN will be held, on July 19 th, in Rome. The only item on the agenda will be a discussion of the Linear Collider. Both the Director of DESY and the Chair of ICFA have been invited.

15. Brian Foster - LCUK Lancaster 15 Other events The recent London meeting of the Halliday group was generally thought to be very positive, with agreement being reached by all parties on aiming to have a LC running by 2015, with an “exit path” in case LHC results clearly indicate that a 1 TeV LC would not be sensible, around 2009-10. The minutes of this meeting have been interpreted rather differently by different actors; the July meeting will hopefully introduce some further clarity. An “ad-hoc” group of funding authorities has had two meetings in London, chaired by Ian Halliday. This will also meet again, directly after Council. There is a clear dynamic of urgency from several countries, particularly USA.

16. Brian Foster - LCUK Lancaster 16 Other events Timetable for future events: Continuation of discussion between funding agencies Further studies of organisation structures Selection of Collider Technology (warm or cold) and setting up of an international project team with branches in America, Asia and Europe 2005Start of work of project teams (Global Design Initiative) 2006Completion of the project layout (CDR) including costing 2007Submission of TDR to governments to go ahead with LC 2009Start major spending 2015Start of commissioning

17. Brian Foster - LCUK Lancaster 17 Other events The International LC Workshop was held in Paris on 19th – 23rd April. There was a very large attendance of around 320 and reports on a wide variety of work. B. Barish gave an update on the work of the ITRP.

18. Brian Foster - LCUK Lancaster 18 EU & particle physics CARE has now got well under way. There is growing activity both in the Network, where several workshops are being organised in the next few months, and in the Joint Research Activity, where real work has started. The EU have recently sent the first tranche of payment of 5.235M€, which is being disbursed to the various prime contractors. CARE has discussed the reporting and organisation of the publications that will result from the activity.

19. Brian Foster - LCUK Lancaster 19 EU & particle physics The Design Studies are a separate EU initiative are aimed at contributing to studies related to future facilities of European or World-wide significance by supporting feasibility studies and technical preparatory work (development and testing of critical components, subsystems …) There are three pp activities that can be made to fit with this description: the LC, both TESLA & CLIC; NF and all its associated activity, including SPL (note that the  beams proposal was integrated in the EURISOL proposal led by nuclear physics and therefore was not considered in competition with these) ; DAPHNE upgrade. The EU had announced 3 calls for DS, each separated by a year and each with the same resources.

20. Brian Foster - LCUK Lancaster 20 EU & particle physics It was clear that our chances would be maximised by submitting one DS to each of the three calls. ECFA took the view that the order of urgency and priority should be that the LC bid was submitted to this round, the NF to the next and the DAPHNE bid to the final call. This resulted in the EUROTEV bid being put onto the fast track and being submitted to the EU on 3rd March, with input from 27 different institutions across Europe. This enormous effort was coordinated by Eckhard Elsen at DESY, assisted by Nick Walker and Karsten Buesser, and by Gilbert Guignard at CERN. The total sum involved was 29M€, with 11.25M€ requested from EU.

21. Brian Foster - LCUK Lancaster 21 EU & particle physics The EU rep to the CERN Council 2 weeks ago announced that EuroTeV and EuroFEL (the FEL DS) had been approved, having come respectively 2 nd and 1 st in the ranked list of projects from the referees. Although I have not seen the definitive number, I believe that EuroTeV will be funded at the level of around 9M€ from the EU.

22. Brian Foster - LCUK Lancaster 22 EU & particle physics Extract from the general comments of the referees: “This is an outstanding proposal, complete and compelling in every regard. It will prepare for major European participation and leadership in the most technically challenging accelerator ever built. The tasks are very well organised and the complementarity of the participants is fully exploited.” “Furthermore the anticipated scientific productivity of this machine is as high as any infrastructure of comparable scale in any field. The budgetary needs for this project are significant but justified. A larger contribution from the participating institutions should be considered.”

23. Brian Foster - LCUK Lancaster 23 EU & particle physics “There is a significant risk associated with this Design Study, namely staffing. The budget request is built upon a need for supporting a workforce roughly equivalent to 50 full time and 55 temporary personnel over the three-year performance period. This is a daunting task to identify and hire experts in all these areas, particularly for the temporary workers who may need to be released at the end of the DS.” “This is especially challenging in light of the demands of accelerator physicists, engineers and technologists for other projects building up, including the LHC, XFEL, GSI upgrade, etc.”

24. Brian Foster - LCUK Lancaster 24 EU & particle physics “Furthermore, in the specific case of the EUROTeV project, it is not possible to justify a recommendation of funding at the maximum level at this time. The choice of the main linac technology by the International Technology Review Panel (ITRP), to be made shortly, will play a determining role in the prioritisation and exact technical description of the eight Work Packages. At that time, a more accurate assessment of the individual and total budgets required can be made. It should be emphasized also that this proposal should only be supported insofar as the EUROTeV collaboration is firmly committed to support and work within the framework of the international process for selection of the technology, leading to the construction of the ILC at the earliest possible time.”

25. Brian Foster - LCUK Lancaster 25 EU & particle physics That was the good news. The bad news is that apparently the EU has decided to scrap the next DS calls in order to concentrate on funding as many proposals as possible from this DS round. There will be further I 3 calls in the near future. We will certainly not get another Accelerator R&D I 3, but perhaps we can submit extensions and addenda to the current CARE package.

26. Brian Foster - LCUK Lancaster 26 Summary The status of LC work in the UK is good. The Accelerator Institutes are starting to get off the ground and work on LC-ABD is under way. The detector development is making excellent progress. The developments world-wide are also positive. Funding agencies, particularly in the US, are starting to become involved. The ITRP is making every effort to make a prompt decision on the technology. There is broad agreement on the timescales for going forward, and unanimity has been expressed on the need for a LC with overlap with LHC starting operation in 2015. There is a lot to do and the next 12 months will be a crucial time.