FEL Gain Length and Taper Measurements at LCLS

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Description

We present experimental studies of the gain length and saturation power level from 1.5 nm to 1.5 {angstrom} at the Linac Coherent Light Source (LCLS). By disrupting the FEL process with an orbit kick, we are able to measure the X-ray intensity as a function of undulator length. This kick method is cross-checked with the method of removing undulator sections. We also study the FEL-induced electron energy loss after saturation to determine the optimal taper of the undulator K values. The experimental results are compared to theory and simulations.

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4 pages

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Ratner, Daniel; Brachmann, A.; Decker, F.J.; Ding, Y.; Dowell, D.; Emma, P. et al. July 30, 2010.

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Description

We present experimental studies of the gain length and saturation power level from 1.5 nm to 1.5 {angstrom} at the Linac Coherent Light Source (LCLS). By disrupting the FEL process with an orbit kick, we are able to measure the X-ray intensity as a function of undulator length. This kick method is cross-checked with the method of removing undulator sections. We also study the FEL-induced electron energy loss after saturation to determine the optimal taper of the undulator K values. The experimental results are compared to theory and simulations.

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4 pages

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  • Contributed to 31st Free Electron Laser Conference FEL09, Liverpool, United Kingdom, 23-28 Aug 2009

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  • Report No.: SLAC-PUB-14194
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 984330
  • Archival Resource Key: ark:/67531/metadc1015816

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  • July 30, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 2, 2017, 8:11 p.m.

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Ratner, Daniel; Brachmann, A.; Decker, F.J.; Ding, Y.; Dowell, D.; Emma, P. et al. FEL Gain Length and Taper Measurements at LCLS, article, July 30, 2010; [California]. (digital.library.unt.edu/ark:/67531/metadc1015816/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.