International Linear Collider at Stanford Linear Accelerator Center

International Linear Collider at Stanford Linear Accelerator Center ILC-Americas FY 08 -09 Planning Polarized Electron Source WBS 2. 3 / 3. 3 A. Brachmann J. Clendenin, T. Maruyama, K. Ioakeimidi, F. Zhou 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 1

International Linear Collider at Stanford Linear Accelerator Center Introduction • For FY 07, e- sources at SLAC received 25 % of proposed budget. • It is uncertain if budget will improve in FY 08/09. • Most projects will be continued at a low level. • Emphasis will be placed on laser development. • Priority in FY 08/09 is work needed for TDR. 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 2

International Linear Collider at Stanford Linear Accelerator Center Projects Overview and Outlook for Work at SLAC based on anticipated FY 07 Support • WBS 2. 3. 1 PES Design Study • WBS 3. 3. 1 • WBS 3. 3. 2 • WBS 3. 3. 3 Photocathode R&D Source Laser Prototype Polarized Gun Prototype – Currently not funded at SLAC (or elsewhere) – Even for SLC engineering/design work is needed for TDR, mainly: • HV, Vacuum design • Load-Lock design – Desirable to optimize SLC gun for ILC parameters – Improved HV performance simplified bunching, cost savings – It is unclear where this project can be done (in US, options are SLAC, Cornell, JLab). – Expertise and critical resources are available at SLAC – Issues are manpower and budget 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 3

International Linear Collider at Stanford Linear Accelerator Center FTE Distribution in FY 07 and outlook for FY 08/09 • • WBS 2. 3. 1 (design) WBS 3. 3. 1 (cathode) WBS 3. 3. 2 (laser) WBS 3. 3. 3 (gun) Sum • FTE 07 FTE 08/09 1. 0 0. 75 0 2. 25 (add. Engineer – TDR work) 0. 50 0. 75 0 2. 5 3. 5 For FY 07 we anticipate a total of ~ 1 M $ for Sources Program, FY 08/09 will be funded at this level, the R&D program is adjusted accordingly. 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 4

International Linear Collider at Stanford Linear Accelerator Center WBS 2. 3. 1 (Design) in FY 08/09 • Continue simulations of beam dynamics and beam line component layout • Continue options studies for cost reduction • Beam line components / tunnel layout and integration • Engineering support needed for drawings, details, etc. 9/13/2006 Dogleg SC Booster LINAC (5 Ge. V) Americas Regional Team FY 08 -09 Planning Meeting 1 e. LTR 5

International Linear Collider at Stanford Linear Accelerator Center WBS 3. 3. 1 Photocathode R&D • Redesign of SLC/NLC (E 158) polarized photocathodes has potential of increasing polarization by up to 5% (~ 85% to ~ 90%). • Current funding and anticipated funding level allows: – – – • Maintaining know how and equipment Very modest R&D activities to advance photocathode technology Significant progress is uncertain with given current funding level Projects funded at a low level through ILC, SBIR’s and other sources (e. g. collaboration with University of Wisconsin) – – Improve QE and polarization (new materials, application of cathode bias) Improve robustness • • – – protective coatings Low temperature surface cleaning Atomic Hydrogen cleaning Improve experimental capabilities such as Faraday rotation experimental system and CTS upgrade (add. MOTT polarimeter) Study of electron spin transport and depolarization mechanisms 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 6

International Linear Collider at Stanford Linear Accelerator Center WBS 3. 3. 2 Source Laser Prototype Overview FY 08 upgrade Existing hardware FY 07 FY 08 FY 07 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 7

International Linear Collider at Stanford Linear Accelerator Center WBS 3. 3. 2 Laser R&D • • Highest priority project at SLAC – ‘Proof of Principle’ for TDR New facility allows connection of laser system and gun to produce electron beam with ILC bunch structure (majority of FY 05/06 investments (~ 300 k$ ILC + 300 k$ SLAC budget = 600 k$) Current # of FTE is minimum needed Required M&S for laser development: – FY 07 (~ 250 - 300 K$) Pulse Train Generation • • Pulse Stretcher and Shaper Amplifier Pump – FY 08 (~ 350 k$) Pulse Train Amplification • • Upgrade to cavity dumped mode-locked Oscillator Cryogenically Ti: Sapphire Amplifier – FY 09 (~ 350 k$) Generate ILC e- bunchtrain • 9/13/2006 System Integration, Hardware TBD (additional amplification) Americas Regional Team FY 08 -09 Planning Meeting 1 8

International Linear Collider at Stanford Linear Accelerator Center WBS 3. 3. 2 Laser R&D – Injector Test Facility 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 9

International Linear Collider at Stanford Linear Accelerator Center FY 05/06 ITF Investment 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 10

International Linear Collider at Stanford Linear Accelerator Center Summary Emphasis for FY 08/09 is Preparation of TDR • WBS 2. 3. 1 Design – Beam optics simulations to support technical specification of source components – Continue work with technical/global and other area systems to a level sufficient for TDR • WBS 3. 3. 1 Photocathode R&D – R&D program continued at low level, current status is ok for TDR, large potential for improvement of Physics at ILC, machine reliability – Combination of Photocathode and Laser R&D will reveal needs for injector R&D and design needs • WBS 3. 3. 2 Source Laser R&D – Priority at SLAC, at the end of FY 09 we expect to have accomplished ‘Proof of Principle’ – sufficient for TDR • WBS 3. 3. 3 Gun Development – Outcome unclear. Currently, level of detail for TDR will be: ‘We will use the SLC gun’ 9/13/2006 Americas Regional Team FY 08 -09 Planning Meeting 1 11