Author: Larsen, K.
Paper Title Page
MOZD3
 Development of Two-Color Sub-Femtosecond Pump/Probe Techniques with X-Ray Free-Electron Lasers  
 
  • Z.H. Guo, P.L. Franz
    Stanford University, Stanford, California, USA
  • D.B. Cesar, J.P. Cryan, T.D.C. Driver, J.P. Duris, Z. Huang, K. Larsen, S. Li, A. Marinelli, J.T. O’Neal, R. Robles, N.S. Sudar, A.L. Wang, Z. Zhang
    SLAC, Menlo Park, California, USA
  
  Funding: This work is supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), Accelerator and Detector research program.
We re­port the gen­er­a­tion of GW-level at­tosec­ond pump/probe pulse pairs with tun­able sub-fem­tosec­ond de­lays at the Linac Co­her­ent Light Source (LCLS). The at­tosec­ond 370 eV pump pulse is first gen­er­ated via the En­hanced Self-Am­pli­fied Spon­ta­neous Emis­sion (ESASE) method, then the at­tosec­ond 740 eV probe pulse is pro­duced by re-am­pli­fy­ing the elec­tron beam mi­crobunch­ing after the mag­netic chi­cane. Due to the har­monic am­pli­fi­ca­tion, the min­i­mal delay be­tween pump-probe pulse pairs (lim­ited by slip­page be­tween the light field and the elec­tron bunch) can be shorter than 1 fem­tosec­ond. We use the an­gu­lar streak­ing tech­nique to mea­sure tem­po­ral de­lays be­tween pump/probe pulse pairs at mul­ti­ple beam­line con­fig­u­ra­tions. When the delay chi­cane is turned off, the av­er­aged delay is in­creased by ~150 at­tosec­onds by adding one un­du­la­tor mod­ule for probe pulses. Long de­lays can be set up by turn­ing the delay chi­cane on. These ex­per­i­men­tal re­sults are in agree­ment with start-to-end XFEL sim­u­la­tions. Look­ing to­ward fu­ture ex­per­i­ments, our sub-fem­tosec­ond pump/probe tech­nique can be ap­plied to ob­serve elec­tronic charge dy­nam­ics in mol­e­c­u­lar sys­tems. 		 
slides icon Slides MOZD3 [13.059 MB]  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)