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

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Self Seeding Chicane to get electrons away from photons Works in concept, but chicane needs to be very long to get the same delay as the monocromator. (can’t bend to far due to CSR). Crystal Monocromator Can use 2 bunches: 1st bunch generates seed light 2nd bunch timed to interact with seed light from 1st bunch in the second undulator (Y. Ding, Z. Huang, R. Ruth) Single bunch self-seeding: Short X-ray pulse passes through narrow b<strong>and</strong> crystal “stop” filter Filter rings for a few fs after the pulse Bunch is delayed in a small chicane to be timed with the ringing pulse. (G. Geloni, V. Kocharyan, E. Saldin) Power dist. after diamond crystal Monochromatic seed power 5 MW 6 mm � 20 fs Wide-b<strong>and</strong> power P. Emma 34 34
Laser Seeding (ECHO) Laser fundamental wavelength ~0.8um. Need 1000X harmonic for soft X-rays, 10,000X harmonic for hard X-rays Can generate ~4 th harmonic with high efficiency in non-linear crystals Can generate up to ~100 th harmonic in gas discharge, but efficiency is poor. ECHO seeding provides a method to generate high harmonics from a beam. (G. Stupakov) Concept demonstrated at SLAC (X5 harmonic), (D. Xiang) 35
Page 1 and 2: Synchrotron Radiation Sources and F
Page 3 and 4: X-ray Beam Parameters • Energy /
Page 5 and 6: Grazing incidence mirror Focusing X
Page 7 and 8: Undulator Radiation Most high brigh
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: Seeding • FEL light is amplified
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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