LCLSII Latest Layout stay tuned for endless revisions

LCLS-II: Latest Layout (stay tuned for endless revisions) P. Emma Oct. 6, 2010 SLAC

LCLS-II Goals LCLS-II is step along the way to LCLS-2025… LCLS-II will use 2 nd km of SLAC linac to provide independent electron source (sectors 10 -20) Build new soft x-ray FEL from 0. 25 to 1. 8 ke. V Build new hard x-ray FEL up to 13 ke. V Price cap presently set at 400 M$ Build new undulator tunnel to allow easy expansion in the future (civil construction now) To fit within price cap, feed both new FELs (HXR & SXR) in series with one electron transport line

Schematic Layout of LCLS-II New undulator tunnel (~200 m long? ) New Hard X-ray FEL with adjustable-gap undulator New Soft X-ray FEL with adjustable-gap undulator gun-2 Und. Hall-1 gun-1 sectors 10 -20 LCLS-II sectors 20 -30 LCLS-I NEH-1 3. 5 -14 Ge. V LCLS-I 0. 5 -10 ke. V LCLS-II 3. 5 -14 Ge. V 4 -13 ke. V 0. 25 -1. 8 ke. V Und. Hall-2 All electron beamlines support up to 14 Ge. V at 120 Hz 3 FELs and 2 Electron Sources (+ more later) NEH-2

LCLS-2025 ? 4 -5 FELs with 2 -3 independent electron sources Add 3 rd km of linac? Don’t take this too seriously yet gun-2 Und. Hall-1 gun-1 sectors 10 -20 LCLS-II sectors 20 -30 LCLS-I 20 ke. V 3. 5 -14 Ge. V NEH-1 LCLS-I 0. 5 -10 ke. V LCLS-II 5 -20 ke. V 3. 5 -14 Ge. V 0. 2 -2 ke. V Und. Hall-2 All electron beamlines support up to 14 Ge. V at 120 Hz and at least 2 bunches per RF pulse 4 -5 FELs and 2 -3 Electron Sources NEH-2

LCLS-II: New Injector, Accelerator, & Bypass enclosure exists RF at sector 10 gun-2 3. 5 -14 Ge. V RF gun-1 3. 5 -14 Ge. V e- bypass line new undulators L 0 X L 1 X BC 1 L 2 BC 2 L 3 L 1 Sector-20 wall sector-10 sector-14 sector-20 BC 1 L 2 BC 2 existing LCLS sector-24 L 3 undulator 3. 5 -14 Ge. V sector-30 und-hall Use 2 nd km of SLAC linac (sector 10 to 20) – greater flexibility 3 -14 Ge. V energy at 120 -Hz beam rate; or 3 -7 Ge. V energy (no SLED) allowing 360 -Hz beam rate Preserves possibility of up to 28 Ge. V (and still 1 more km left!)

LCLS-II Timeline, Compatible with Operations 400 M$ R&D CDR Installation ED&I Fabrication CD-0 FY 11 CD-4 CD-2, -3 CD-1 FY 12 FY 13 FY 14 FY 15 FY 16 Start Injector Construction Annual 3 month summer downtime Phase-1 Installation Phase-2 Installation CD-0 is done and CD-1 set for April 2011. The remainder is not locked down yet. FY 17