Author: Wan, W.
Paper Title Page
TUXC06 Visualizing Lattice Dynamic Behavior by Acquiring a Single Time-Resolved MeV 1311
 
  • X. Yang, T.V. Shaftan, V.V. Smaluk, J. Tao, L. Wu, Y. Zhu
    BNL, Upton, New York, USA
  • W. Wan
    ShanghaiTech University, Shanghai, People’s Republic of China
  
  We ex­plore the pos­si­bil­ity of vi­su­al­iz­ing the lat­tice dy­namic be­hav­ior by ac­quir­ing a sin­gle time-re­solved MeV UED image. Con­ven­tion­ally, mul­ti­ple UED shots with vary­ing time de­lays are needed to map out the en­tire dy­namic process. The mea­sure­ment pre­ci­sion is lim­ited by the tim­ing jit­ter be­tween the pulses of laser pump and UED probe. We show that, by con­vert­ing the lon­gi­tu­di­nal time of an elec­tron bunch to the trans­verse po­si­tion of a Bragg peak on the de­tec­tor, one can ob­tain the full lat­tice dy­namic process in a sin­gle elec­tron pulse. We pro­pose a novel de­sign of a time-re­solved UED with the ca­pa­bil­ity of cap­tur­ing a wide range of dy­namic fea­tures in a sin­gle dif­frac­tion image. The work pre­sented here is not only an ex­ten­sion of the ul­tra­short-pulse pump/long-pulse probe scheme being used in tran­sient spec­troscopy stud­ies for decades but also ad­vances the ca­pa­bil­i­ties of MeV UED for fu­ture ap­pli­ca­tions with tun­able elec­tron probe pro­file and de­tect­ing time range with fem­tosec­ond res­o­lu­tion. Fur­ther­more, we pre­sent nu­mer­i­cal sim­u­la­tions il­lus­trat­ing the ca­pa­bil­ity of ac­quir­ing a sin­gle time-re­solved dif­frac­tion image based on the case-by-case stud­ies of lat­tice dy­namic be­hav­ior.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUXC06  
About • paper received ※ 14 May 2021       paper accepted ※ 28 July 2021       issue date ※ 31 August 2021  
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