John N. Galayda DESY Workshop [email protected]October 8, 2008 1 LCLS LCLS Commissioning in 2008 Commissioning in 2008 J. Galayda, for J. Galayda, for The The LCLS LCLS Construction/Commissioning Team Construction/Commissioning Team DESY DESY Oct. 8, 2008 Oct. 8, 2008 LCLS LCLS Overview Overview Construction Status Construction Status Commissioning results Commissioning results Stability Stability Day-to-Day Performance Day-to-Day Performance Short pulses Short pulses Plans for 2009 Plans for 2009 LCLS Instruments LCLS Instruments
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John N. Galayda DESY [email protected] October 8, 2008 1 LCLS Commissioning in 2008 J. Galayda, for The LCLS Construction/Commissioning.
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LCLSLCLS Commissioning in 2008 Commissioning in 2008J. Galayda, for J. Galayda, for The The LCLSLCLS Construction/Commissioning Team Construction/Commissioning Team
DESYDESY
Oct. 8, 2008Oct. 8, 2008
LCLSLCLS
OverviewOverviewConstruction StatusConstruction StatusCommissioning resultsCommissioning resultsStabilityStabilityDay-to-Day PerformanceDay-to-Day PerformanceShort pulsesShort pulsesPlans for 2009Plans for 2009LCLS InstrumentsLCLS Instruments
Now measure BPM jitter both Now measure BPM jitter both with transverse RF OFF, and with transverse RF OFF, and then ON (at constant phase)then ON (at constant phase)
tt ±0.6 ps±0.6 ps
slope = slope = 2.34 mm/deg2.34 mm/deg
9 9 m rmsm rms 110 110 m rmsm rms
TCAV ONTCAV ONTCAV OFFTCAV OFF
BPM
Y P
ositi
on (
mm
)B
PM Y
Pos
ition
(m
m)
Measuring Bunch Arrival Time JitterMeasuring Bunch Arrival Time Jitter
Measurements and SimulationsMeasurements and Simulationsfor 20-pC Bunch at 14 GeVfor 20-pC Bunch at 14 GeV
Photo-diode signalPhoto-diode signal on OTR screen after BC2 shows on OTR screen after BC2 shows minimum compression at L2-linac phase of -34.5 deg.minimum compression at L2-linac phase of -34.5 deg.
Horizontal projected emittanceHorizontal projected emittancemeasuredmeasured at 10 GeV, after BC2, at 10 GeV, after BC2,using 4 wire-scanners.using 4 wire-scanners.
Y. DingY. Ding
LCLS FEL LCLS FEL simulationsimulation at 1.5 at 1.5 ÅÅ based on measured based on measured injector beam and injector beam and ElegantElegant tracking, tracking, with CSR, at 20 pC.with CSR, at 20 pC.
1.5 Å1.5 Å,,3.63.610101111 photons photonsIIpkpk = 4.8 kA = 4.8 kA 0.4 µm0.4 µm
20-pC Bunch at 4.3 GeV, 15 Angstrom 20-pC Bunch at 4.3 GeV, 15 Angstrom Approaches a LongitudinallyApproaches a LongitudinallyCoherent Single SpikeCoherent Single Spike
Y. DingY. Ding
15 Å15 Å,zz = 25 m, = 25 m,2.42.410101111 photons, photons,IIpkpk = 2.6 kA, = 2.6 kA, 0.4 µm0.4 µm
(power profile at (power profile at zz = 25 m varies from = 25 m varies from shot to shot due to noisy startup)shot to shot due to noisy startup)
1.2 fs1.2 fs
zz = 25 m = 25 m
LCLS FEL LCLS FEL simulationsimulation at 15 at 15 ÅÅ based on measured injector beam based on measured injector beam and and ElegantElegant tracking, tracking, with CSR, at with CSR, at 20 pC.20 pC.
Presentation MaterialsThanks to:SLAC ANL LLNLJess Albino Geoffrey Pile Richard BiontaJohn Arthur Bill Berg Donn McMahon Paul Emma Marion WhiteTom FornekDavid SaenzDavid Schultz