LCLS Accelerator 6 MeV z 0.83 mm 0.05 % rf gun 250 MeV z 0.19 mm 1.6 % 135 MeV z 0.83 mm
Download ReportTranscript LCLS Accelerator 6 MeV z 0.83 mm 0.05 % rf gun 250 MeV z 0.19 mm 1.6 % 135 MeV z 0.83 mm
LCLS Accelerator 6 MeV z 0.83 mm 0.05 % rf gun 250 MeV z 0.19 mm 1.6 % 135 MeV z 0.83 mm 0.10 % 4.30 GeV z 0.022 mm 0.71 % 13.6 GeV z 0.022 mm 0.01 % Linac-X L =0.6 m rf= -160 Linac-0 L =6 m Linac-1 L 9 m rf -25° ...existing linac 21-1 b,c,d DL1 L 12 m R56 0 Linac-2 L 330 m rf -41° Linac-3 L 550 m rf 0° 21-3b 24-6d 25-1a 30-8c X BC1 L 6 m R56 -39 mm Commission in Jan. 2007 BC2 L 22 m R56 -25 mm Commission in Jan. 2008 SLAC linac tunnel undulator L =130 m DL2 L =275 m R56 0 research yard LCLS Installation and Commissioning Time-Line Drive-Laser Commissioning undulator hall ready Drive-Laser Install LTU/und. Install linac/BC2 Install First FEL Light First Spont. Light M J J A SOND J FMAM J J A SOND J FMAM J J 2006 2007 2008 May 2006 Gun/Inj./BC1 Gun/Inj./BC1 Install Commissioning linac/BC2 Commissioning FEL Comm. LTU/undulator Commissioning RF Photo-Cathode Gun Q = 1 nC f = 120 Hz G = 120 MV/m gex,y = 1 mm Dt = 10 ps I = 100 A Slice emittance >1.8 mm will not saturate eN = 1.2 mm P = P0 eN = 2.0 mm P P0/100 courtesy S. Reiche electron beam must meet brightness requirements Complete & Detailed Design (cathode to dump) cathode L2 BC2 L3 LTU undulator Full MAD deck at: http://www-ssrl.slac.stanford.edu/lcls/linac/optics/lcls.txt Bunch Compression Progression after L2 energy profile phase space time profile after DL1 z = 830 mm after L1 z = 190 mm after BC2 z = 830 mm after X-RF z = 23 mm after L3 z = 830 mm after BC1 z = 23 mm at und. z = 190 mm z = 23 mm Location of Main Linac Diagnostics 5+ energy spread meas. stations (optimized with small b) 5+ emittance meas. stations designed into optics (Dyx,y) BPMs at or near most quadrupoles and in each bend syst. RF deflectors for slice e and E measurements (L0 & L3) rf gun T-cav. gex,y ...existing linac L1 E E gex,y gex,y T-cav. L2 X E E gex,y L3 E E gex,y E E E E Slice-Emittance Measurement Simulation RF-deflector at 1 MV slice OTR 10 times 135 MeV quad scanned y bunch length Slice-Emittance Measurement Simulation (slice-y-emittance also simulated in BC1-center) Injector (135 MeV) with S-band RF-deflector at 1 MV (same SLAC slice-e code used at BNL/SDL) = meas. sim. = calc. = y distribution = actual DL1 slice-emit on WS02 slice-5 Gun/Injector Diagnostics RF Gun E NT VA C UU M TR EA TM PU C BER MPS HAM YAG screen YAG screen LO A S NG SE B EL M BL LO Y WS SP SE O OL AL S FR O MV AL H VE PO R OLD CU PI E R NE CA TH O DE UH GA V A TE LL V M AL ET VE AL S YAG screen YAG screen gun spectrometer trajectory (BPMs) emittance (+ slice) energy spread (+ slice) bunch length (+ dist.) charge (+ dark current) YAG screen Transverse RF deflector OTR screen & wire OTR screen & wire OTR screen & wire OTR screen & wire main SLAC Linac injector spectrometer YAG screen YAG & OTR Injector Through BC1 Commissioning no laser-heater until 2007 RF deflector gex,y and slice E E Injector Through BC1 Commissioning (2) relative bunch length monitors BC1 X-band RF E E slice gey gex,y stopper Linac-To-Undulator (LTU) vertical bends energy centroid & spread meas. (OTR) (310-5 & 10-4) + collimation 4 e-wires, 6 collimators, 1 OTR vertical bend 4.7 mr horizontal jog 1.25 m energy diagnostics emit. diagnostics bunch length diag. collimators CSR cancellation branch points for future undulators spontaneous undulator possible Enhanced CSR in BC1 Emittance of RF Photo-Cathode Gun Micro-Bunching Instability Bunch Length Monitors CSR in BC1 and BC2 Impedance in BC2 Vacuum Chambers Space-Charge Effects in BC1 Region Chromatic Correction for Highly Chirped Beams Improved LTU Lattice Undulator Wakefields FEL Commissioning and Tuning Start-to-end Simulations and Integration with LCLS Controls ESASE/Replicator Optical Klystron Gain Enhancement Seeded and Self-Seeded FEL for Next Phase of LCLS Development of an X-band Transverse RF Deflector Multi-bunch LCLS and Regenerative Amplifier FEL Harmonic Afterburner