Author: Huang, Z.
Paper Title Page
WEA1IO01
 Demonstration of Energy-Chirp Control in Relativistic Electron Bunches at LCLS Using a Corrugated Structure  
 
  • T.J. Maxwell, K.L.F. Bane, A.S. Fisher, M.W. Guetg, Z. Huang, R.H. Iverson, A. Novokhatski, G. Stupakov, J. Zemella, Z. Zhang
    SLAC, Menlo Park, California, USA
  • M.A. Harrison, J.D. McNevin, M. Ruelas
    RadiaBeam Systems, Santa Monica, California, USA
  • J. Zemella
    DESY, Hamburg, Germany
  • Z. Zhang
    TUB, Beijing, People's Republic of China
  
  An experimental study is presented of a corrugated structure that uses wakefields to remove linear energy correlation in a high energy (4.4 - 13.3 GeV) electron beam (a dechirper). Time-resolved measurements of both longitudinal and transverse wakefields of the device are presented and compared with simulations. We demonstrate flexible control of the LCLS FEL bandwidth and present novel uses of the device in addition to energy chirp control.  
slides icon Slides WEA1IO01 [18.218 MB]  
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WEPOB30 Simulation of the Shot-Noise Driven Microbunching Instability Experiment at the LCLS 967
 
  • J. Qiang
    LBNL, Berkeley, California, USA
  • Y. Ding, P. Emma, Z. Huang, D.F. Ratner, T.O. Raubenheimer, F. Zhou
    SLAC, Menlo Park, California, USA
  
  The shot-noise driven microbunching instability can significantly degrade electron beam quality in next generation light sources. Experiments were carried out at the Linac Coherent Light Source (LCLS) to study this instability. In this paper, we will present start-to-end simulation of the shot-noise driven microbunching instability experiment at the LCLS.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB30  
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WEPOB49 LCLS Injector Laser Profile Shaping Using Digital Micromirror Device 1001
SUPO22   use link to see paper's listing under its alternate paper code  
 
  • S. Li
    Stanford University, Stanford, California, USA
  • S.C. Alverson, D.K. Bohler, A.R. Fry, S. Gilevich, Z. Huang, A. Miahnahri, D.F. Ratner, J. Robinson, F. Zhou
    SLAC, Menlo Park, California, USA
  
  In the Linear Coherent Light Source (LCLS) at SLAC, the injector laser plays an important role as the source of the electron beam for the Free Electron Laser (FEL). The emittance of the beam is highly related to the transverse profile of the injector laser. Currently the LCLS injector laser has undesired features, such as hot spots, which carry over to the electron beam. These undesired features increase electron emittance, degrade the FEL performance, and complicate operations. The injector laser shaping project at LCLS aims to produce arbitrary electron beam profiles, such as cut-Gaussian, uniform, and parabolic, and to study the effect of spatial profiles on beam emittance and FEL performance. Effectively it also allows easy transition between the two spare lasers, where the operators can use the spatial shaper to achieve identical profiles for the two lasers. In this paper, we describe the experimental methods to achieve laser profile shaping and electron beam profile shaping respectively, and demonstrate promising results.  
poster icon Poster WEPOB49 [1.850 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB49  
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