Phase and voltage jitter in each linac plus

Phase and voltage jitter in each linac, plus charge and guntiming jitter, cause final energy, peak current, and timing jitter. 6 Me. V z 0. 83 mm 0. 05 % 250 Me. V 4. 54 Ge. V z 0. 19 mm z 0. 022 mm 1. 6 % 0. 71 % Linac-X L =0. 6 m rf= -160 Linac-1 Linac-2 Linac-3 L 9 m L 330 m L 550 m rf -25° rf -41° rf -10° 135 Me. V z 0. 83 mm 0. 10 % rf gun w ne Linac-0 L =6 m . . . existing linac DL 1 L 12 m R 56 0 21 -1 b 21 -1 d X BC 1 L 6 m R 56 -39 mm 21 -3 b 24 -6 d BC 2 L 22 m R 56 -25 mm SLAC linac tunnel (Apr. 15, 2003) 25 -1 a 30 -8 c 14. 1 Ge. V z 0. 022 mm 0. 01 % undulator L =130 m LTU L =275 m R 56 0 research yard

LCLS longitudinal jitter sensitivities for gun and each linac section parameter |DE/E 0| = 0. 1% |DI/I 0| = 12% |Dtf| = 100 fs unit Dti 1. 6 4. 4 1. 5 psec D Q/ Q 0 46 5. 2 24 % Df 0 3. 5 0. 65 5. 9 deg-S DV 0 /V 0 0. 32 0. 24 0. 95 % Df 1 0. 32 0. 17 1. 0 deg-S DV 1 /V 1 0. 29 0. 25 0. 78 % Df. X 5. 5 1. 4 7. 6 deg-X DVX/VX 2. 0 1. 2 6. 3 % Df 2 0. 54 0. 21 0. 084 deg-S DV 2 /V 2 1. 1 1. 0 0. 13 % Df 3 0. 35 24. 8 15 deg-S DV 3 /V 3 0. 15 5. 7 8. 6 %

RF Phase Jitter and Energy Feedback E E E = E 0 D without energy feedback E = E 0 t D with energy feedback t

Gun Timing Jitter and Energy Feedback E E E = E 0 Dt without energy feedback E = E 0 t Dt t with energy feedback Energy feedback in chicanes causes 1 -to-1 gun-timing to final timing jitter!