| Paper | Title | Page |
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| MOPMB052 | On-axis Injection using a Sin Wave RF Kicker | 211 |
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| On-axis injection is one of the critical issues for an ul-tra-low emittance storage ring which holds a rather small dynamic aperture. In order to reduce the challenges of the fast pulsed kicker design, a sin wave RF kicker is studied which is suitable for longitudinal on-axis injection. Since the injected bunch is longitudinally apart from the stored bunches, the location of the stored bunches can be at the π knot of the sin wave, while the injected bunches are launched at a phase around π/2+n·π. At this situation the injected bunches will receive a transverse kick, however the store bunches are almost un-affected. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB052 | |
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| MOPMW015 | Wakefields Studies of High Gradient X-band Accelerating Structure at SINAP | 429 |
| SUPSS087 | use link to see paper's listing under its alternate paper code | |
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Shanghai compact hard x-ray free electron laser (CHXFEL)* is now proposed accompanied with a high-gradient accelerating structure, which is the trend of large scale and compact facility. This structure operated at X-band (11424 MHz) holds the promise to achieve high gradient up to 80 MV/m. However, due to its particular property, a more serious wakefields** will be generated, leading to worse beam instability effects. In this paper, the computation of this case will be carried out with simulation. Moreover, analysis and optimization will be adopted to suppress beam instability.
* C. Feng, Z. T. Zhao, Chinese Sci Bull, 2010, 55, 221-227. ** K. Bane, SLAC, NLC-Note 9, Feb. 1995. |
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| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMW015 | |
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| MOPOW027 | Generation of Coherent Mode-locked Radiation in a Seeded Free Electron Laser | 777 |
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| We present the promise of generating mode-locked multichromatic radiations in a seeded free electron laser based on high gain harmonic generation (HGHG). 3D start-to-end simulations have been carried out and analysis & comparisons have been made to have a research on the properties of each system. In these schemes, either the electron beam density or the seed laser intensity is modulated to produce a coherent radiation pulse train that yields multiple spectral lines in FEL output. Stable peak power at gigawatt level can be generated in the undulator finally. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOW027 | |
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| MOPOW028 | Research on Pulse Energy Fluctuation of a Cascaded High Gain Harmonic Generation Free Electron Laser | 781 |
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| Shot to shot pulse energy fluctuation is one of the most critical issues for two-stage cascaded high gain harmonic generation (HGHG) free electron lasers (FELs). In this paper, we study the effects of various electron parameters jitters on the output pulse energy fluctuations based on Shanghai Soft X-ray free electron laser facility (SXFEL). The results show that the relative timing jitter between the electron beam and the seed laser is proved to be the most sensitive factor. The energy jitter and charge jitter make some contributions and are non-ignorable as well. Some comparisons between our facility and FERMI have been made and we hope the conclusions draw from this study would be a reference for the optimization of future seeded FEL facilities based on cascading stages of HGHG. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOW028 | |
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