J.C. Sheppard, SLAC Americas Region January 31, ILC Reference Design Report Status 2nd ILC Positron Source Collaboration Meeting IHEP, Beijing, China J. C. Sheppard SLAC January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, October 2006: Submitted Cost Reduction Schemes for discussion Single Positron Production Target ½ Correctors and BPMs in Transport Lines Reduced Underground Facilities (19km  5 km Transport Line for Central Injector) Comparison of Undulator Source cost to Conventional Source [reject conventional source] Keep Alive Source Deletion November, 2006 Valencia Meeting to discuss layout: Accepted Cost Reduction schemes Rejected Conventional Source Retain Keep Alive Source Add DR Injection Line Spin Rotators for 30% initial polarization December, 2006 ILC GDE Cost Review Meeting, mainly Technical Systems reports with Global Systems Leaders observing RDR Status ILC GDE Activities Since RAL Meeting

J.C. Sheppard, SLAC Americas Region January 31, January 2007: Review cost and inventory Wrote RDR (mainly Vinod Bharadwaj for e+ with everyone’s participation) Machine Advisory Committee (MAC) review in Daresbury, JM Paterson presented e-,e+ designs February 2007:Beijing ILC GDE Meeting to release RDR, description and cost RDR Status ILC GDE Activities Since RAL Meeting

J.C. Sheppard, SLAC Americas Region January 31, Draft RDR for Beijing After much discussion, the board and the editors have agreed that it will not be possible to produce a satisfactory complete and finished draft by Beijing, given the amount of general editing that we feel still remains to be done. We therefore propose to produce an incomplete reduced scope document as follows: 1. We have concentrated the editing efforts over the last week on a core sub-set of the RDR (see below for details). 2. The current version of this core document has been frozen as of 6PM PST, 30th January, and has been formally handed to the Executive Committee (EC) for review; no further content edits to these draft sections will occur, notwithstanding comments from the EC. RDR Status ILC RDR Status as of January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, Draft RDR for Beijing 3. At the end of the Beijing meeting, and after review and sign-off by the EC, a PDF version of the core draft will be made available for download to the public. 4. A final draft – including all sections, edited, reviewed and signed-off by the EC – will be made available by no later than April 1st, The final document will be published in summer, 2007, after external review. RDR Status ILC RDR Status as of January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, Draft RDR for Beijing As of 6PM CST 30th January, the core document is composed of the following sections: I. RDR Introduction II. Accelerator Design II-1 ILC Overview II-2 Electron Source II-3 Positron Source II-4 Damping Rings II-5 RTML II-6 Main Linacs II-7 BDS RDR Status ILC RDR Status as of January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, Draft RDR for Beijing As of 6PM CST 30th January, the core document is composed of the following sections: III. Technical and Global Systems III-1 Magnets III-2 Vacuum III-3 Modulator III-4 Klystron III-5 Power Distribution III-6 Cavities III-7 Cryomodules III-8 Cryogenics IV. CFS V. Sample Sites VI. Cost and Schedule RDR Status ILC RDR Status as of January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, Draft RDR for Beijing The remaining sections: II-8 Beam Dynamics II-9 Operations and Availability III-9 LLRF III-10 Instrumentation III-11 Dumps and Collimators III-12 Controls and Timing Systems will continue to be worked on by the editors and authors on a best-effort basis for the Beijing release. The last chapter on the EDR will be started after Beijing. RDR Status ILC RDR Status as of January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, Draft RDR for Beijing Please also note that the RDR MB and the editors are aware of several technical inconsistencies between the BCD and the current RDR, many of which will require formal Change Control Requests and subsequent review by the CCB. A catalogue of these modifications is being made. Should you identify technical details that fall into this category, please send them to Nobu Toge Plans for bringing the RDR and BCD inline with each other will be discussed at the Beijing meeting. RDR Status ILC RDR Status as of January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, Draft RDR for Beijing References and supporting documentation The RDR is intended to be a ‘light’ readable document, which describes the machine design in enough detail to support feasibility and the cost estimate. It does not completely reflect the amount of detailed technical work that exists. It is important that this detailed technical work be documented to support the RDR content (references), and before moving on to the EDR phase. We would like to ask all the groups to produce detailed ILC Reports on their respective systems where appropriate. Several of the RDR chapters and sections have been shortened by the editors to maintain a consistent look-and-feel and level of detail to the document as a whole. It is important that the omitted information be captured in standalone ILC Reports, which can then be referenced by the RDR itself. In order to include the references in the RDR, you can request a report number from Max Max will maintain a list of titles, authors and report numbers. The ILC Reports themselves should be completed before April 1st. RDR Status ILC RDR Status as of January 31, 2007

J.C. Sheppard, SLAC Americas Region January 31, Positron System Site Layout Discussions: 2007 Undulator Scheme

J.C. Sheppard, SLAC Americas Region January 31, Positron System Site Layout : 2007 Undulator Scheme

J.C. Sheppard, SLAC Americas Region January 31, Layout of ILC Positron Source: January 2007 Photon production at 150 GeV electron energy K=0.92, =1.15 cm, 147 m long helical undulator, UK design One e+ production station (no backup-- fast target exchange) + KAS Pulsed OMD (shielded target) Reduced number of BPM electronics and correctors in transport lines Keep alive auxiliary source, 10% intensity (500 MeV, 2.05x10 10 e-/bunch, 2625(?) bunches/pulse, 5 pulses/s into ~4 r.l. W-Re spinning target, collection system same as for main positron production, 400 MeV e+ preBoost, inject into e+ 5 GeV Booster) Undulator Scheme

J.C. Sheppard, SLAC Americas Region January 31, Positron System Remote Handling Concept: SLAC,LLNL, CCRLC (Daresbury and Rutherford) Undulator Scheme Target Assembly In Place Target Assembly Lifting Out 1.25 m

J.C. Sheppard, SLAC Americas Region January 31, Positron System Remote Handling Concept: SLAC,LLNL, CCRLC (Daresbury and Rutherford) Undulator Scheme

J.C. Sheppard, SLAC Americas Region January 31, Positron System Spinning Disk Exp & Simulations: ANL, LLNL, SLAC Undulator Scheme Cu Disk NdFeB Magnet Strain Gauges

J.C. Sheppard, SLAC Americas Region January 31, Positron System Spinning Disk Simulations, ANL (Antipov, Gai, Liu) Undulator Scheme

J.C. Sheppard, SLAC Americas Region January 31, Positron System Spinning Disk Simulations, ANL (Antipov, Gai, Liu) Undulator Scheme Copper Disk: SLAC, LLNL exp

J.C. Sheppard, SLAC Americas Region January 31, February-April 2007: Complete RDR and supporting documentation Update BCD to reflect current design February-June 2007: Develop Engineering Design Report Work Plan A Coordinated Global Effort Needs Definition of Deliverables Must include: R&D goals System Engineering Physical Layouts Cost /Schedule for Construction June 2007: Hamburg GDE/LCWS Meeting to finalize global EDR plans Lot’s of Work, Lots of Fun! RDR Status ILC Positron Effort beyond Beijing Meeting