Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 1 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC LCLS Technical Design Review, TDR LCLS Linac Proper

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 2 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC LCLS Linac Technical Review Agenda : Area Presentation of Area Boundaries to LCLS Injector and LTU Engineers and designers Path from MAD to Layout Path of information and how it relates to the project Layout of L1 to L3 Scope of Work: BC1 & BC2 Paul Emma’s slide Motion diagram First rough sketch Visit to ANL - Problems with the APS bunch compressor – Bellows – Telescopic vacuum chamber Present design Risk assessment Moving components around Sector 21 to sector 30 Agenda : Area Presentation of Area Boundaries to LCLS Injector and LTU Engineers and designers Path from MAD to Layout Path of information and how it relates to the project Layout of L1 to L3 Scope of Work: BC1 & BC2 Paul Emma’s slide Motion diagram First rough sketch Visit to ANL - Problems with the APS bunch compressor – Bellows – Telescopic vacuum chamber Present design Risk assessment Moving components around Sector 21 to sector 30

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 3 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC LI1 – LI3 layout LCLS Linac begins sector 21. The LCLS Injector Group “owns” SLAC Linac sector 20. The LCLS Linac Group “owns” SLAC Linac sector 21 to sector 30 Leif Eriksson is the Mechanical Engineer for the LCLS Linac proper Designer: Nick Braughton Tim Montagne is the Mechanical Engineer for the LCLS Designer: Stephan Davies Linac Proper LTU

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 4 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC MAD TO LAYOUT Example: Linac Sector 21, Bunch Compressor 1 BC1 See distributed hard copy for layout of additional sectors

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 5 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC LEUTL/APS Bunch compressor Visit to ANL Meet with Dr. Sushil Sharma & Al Barcikowski Problems with telescopic vacuum chamber – excessive friction Not needed for LCLS Problems with race track shaped bellows in the dipoles Move bellows outside of dipoles? Have dwg’s for APS Bunch Compressor – Good model to begin with APC BC diagnostic assembly spec’s currently evaluated by Emma/Krejcik Visit to ANL Meet with Dr. Sushil Sharma & Al Barcikowski Problems with telescopic vacuum chamber – excessive friction Not needed for LCLS Problems with race track shaped bellows in the dipoles Move bellows outside of dipoles? Have dwg’s for APS Bunch Compressor – Good model to begin with APC BC diagnostic assembly spec’s currently evaluated by Emma/Krejcik

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 6 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC Bunch Compressor 1 & 2, The Basics LCLS Bunch Compressor 1 & 2, The Basics BPM critical for energy feedback (20  m resolution) screen collimatorquadrupole offset: 17 to 30 cm (24 cm nominal) Paul Emma’s picture 1 st Sketch

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 7 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC Bunch Compressor 1 & 2, The Current Design LCLS Bunch Compressor 1 & 2, The Current Design Design Status See right hand-side pic Cost well understood for LCLS resource loaded schedule Low to moderate risk for: TechnologyCostSchedule Some additional issues for BC2: Longer than BC1 Open issues: Diagnostic package Design Status See right hand-side pic Cost well understood for LCLS resource loaded schedule Low to moderate risk for: TechnologyCostSchedule Some additional issues for BC2: Longer than BC1 Open issues: Diagnostic package

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 8 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC Scope of Work: Sector 21, 22 & 23 Technical riskLow Budgetary riskLow to moderate Schedule riskModerate

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 9 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC Sector 24 & BC2 Scope of Work: Sector 24 & BC2

Linac Coherent Light Source Stanford Synchrotron Radiation Laboratory Stanford Linear Accelerator Center 10 LCLS Linac TDR, December 12, 2003 Leif Eriksson - SLAC Sector 27 & 28 Scope of Work: Sector 27 & 28