Ultrafast Time-Resolved Electron Diffraction with Megavolt Electron Beams

A rf photocathode electron gun is used as an electron source for ultrafast time-resolved pump-probe electron diffraction. The authors observed single-shot diffraction patterns from a 160nm Al foil using the 5.4MeV electron beam from the Gun Test Facility at the Stanford Linear Accelerator. Excellent agreement with simulations suggests that single-shot diffraction experiments with a time resolution approaching 100fs are possible.

[1]  T. N. Hansen,et al.  Atomic-Scale Visualization of Inertial Dynamics , 2005, Science.

[2]  P. R. Bolton,et al.  Longitudinal emittance measurements at the SLAC gun test facility , 2003 .

[3]  Xijie Wang,et al.  Potential of Femtosecond Electron Diffraction Using Near-Relativistic Electrons from a Photocathode RF Electron Gun , 2006 .

[4]  Juris Blums,et al.  Femtosecond X-ray measurement of coherent lattice vibrations near the Lindemann stability limit , 2003, Nature.

[5]  D. Leitner,et al.  Anharmonic lattice dynamics in germanium measured with ultrafast x-ray diffraction. , 2000, Physical review letters.

[6]  H. Park,et al.  Optical control of coherent lattice motions probed by femtosecond electron diffraction. , 2005, The journal of physical chemistry. B.

[7]  F. Decker,et al.  Transverse-emittance measurements on an S-band photocathode RF electron gun , 2001, physics/0111010.

[8]  K. Hagen,et al.  Stereochemical applications of gas-phase electron diffraction. Parts A and B edited by I. Hargittai and M. Hargittai , 1989 .

[9]  Jason R. Dwyer,et al.  Ultrafast electron optics: Propagation dynamics of femtosecond electron packets , 2002 .

[10]  Vladimir A. Lobastov,et al.  Ultrafast electron diffraction (UED) a new development for the 4D determination of transient molecular structures , 2003 .

[11]  Lothar Schäfer,et al.  Real‐time data acquisition for gas electron diffraction , 1984 .

[12]  Thomas P. Wangler,et al.  RF linear accelerators , 2008 .

[13]  V. P. Spiridonov,et al.  A stroboscopical gas-electron diffraction method for the investigation of short-lived molecular species , 1983 .

[14]  Peter M. Weber,et al.  Ultrafast Diffraction Imaging of the Electrocyclic Ring-Opening Reaction of 1,3-Cyclohexadiene , 2001 .

[15]  Ahmed H. Zewail,et al.  Clocking transient chemical changes by ultrafast electron diffraction , 1997, Nature.

[16]  S. Fourmaux,et al.  Non-thermal melting in semiconductors measured at femtosecond resolution , 2001, Nature.

[17]  Paul A. Jaanimagi,et al.  Characterization of a subpicosecond x-ray streak camera for ultrashort laser-produced plasmas experiments , 2000 .

[18]  Picosecond electron diffraction , 1982 .

[19]  Jianming Cao,et al.  Femtosecond electron diffraction for direct measurement of ultrafast atomic motions , 2003 .

[20]  T. N. Hansen,et al.  Clocking femtosecond X rays. , 2005, Physical review letters.

[21]  W. King,et al.  Ultrafast electron microscopy in materials science, biology, and chemistry , 2005 .

[22]  Jason R. Dwyer,et al.  An Atomic-Level View of Melting Using Femtosecond Electron Diffraction , 2003, Science.