Joe Frisch: Synchrotron radiation sources and free ... - Conferences

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X-ray longitudinal phase space • X-ray experiments often use monochromators to reduce the line width from the source. – In this case reduced source linewidth directly increases the photon flux to the experiment. • Nonlinear experiments (like creating multi-core holes) require high peak power • Time resolved measurements require short pulses. • Radiation of course must be transform limited – most sources not near this limit yet. L. Young et. al. LCLS / AMO SLAC / LCLS SXR monochromator 2x10 -4 Bandwidth at 1 KeV
Undulator Radiation Most high brightness X-ray sources rely on undulator radiation (synchrotron radiation from bends also used in storage rings) N S N S N S N S N S N S N S N S S N S N S N S N S N S N S N S N Relativistic electron moves in alternating magnetic field In the average co-moving frame of the electron the undulator wavelength is shortened by gamma. Normalized field strength In weak fields (K < 1), motion is sinusoidal, no harmonics In strong fields (K>1) motion is relativistic in the co-moving frame. This produces nonlinear motion and harmonics. N S N S N S N S N S N S N S N S S N S N S N S N S N S N S N S N K � eB�u 2�m c e In the lab frame, the radiation wavelength is Doppler shifted by another factor of gamma. 7
Page 1 and 2: Synchrotron Radiation Sources and F
Page 3 and 4: X-ray Beam Parameters • Energy /
Page 5: Grazing incidence mirror Focusing X
Page 9 and 10: Accelerators Synchrotron LINAC Acce
Page 11 and 12: Light Source: Petra III at DESY •
Page 13 and 14: LINACS • Single pass devices •
Page 15 and 16: Electron Guns RF guns used at SLAC
Page 17 and 18: 100fs Room Temperature 200ns 10ms P
Page 19 and 20: Energy Time Initial beam Gun 6 MeV
Page 21 and 22: Bunch Compression - Wakefields •
Page 23 and 24: FELs: Gain and Coherent Emission
Page 25 and 26: Undulator as emission mechanism 25
Page 27 and 28: Self Amplified Spontaneous Emission
Page 29 and 30: � � � u p 2� � � 2 �
Page 31 and 32: Gain, Saturation and Taper LCLS Gai
Page 33 and 34: Seeding • FEL light is amplified
Page 35 and 36: Laser Seeding (ECHO) Laser fundamen
Page 37 and 38: Synchrotron Multi-User Capability S
Page 39 and 40: Future Light X-ray Sources • Most
Page 41 and 42: Low energy injector gun Recirculati
Page 43 and 44: Attosecond FELs • Operation at lo
Page 45 and 46: Laser-Plasma Accelerators - LBNL Po
Page 47 and 48: What isn’t covered here: • Almo
Page 49: Discussion • Imagine you want to

Joe Frisch: Synchrotron radiation sources and free ... - Conferences

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