XPP HOME

What is XPP?

We are the first operational hard x-ray instrument at the world's first hard x-ray free electron laser: the Linac Coherent Light Source (LCLS). XPP stands for X-ray Pump Probe, one of the most popular class of experiments being carried at LCLS. Since we begin operation in 2010, we have been working with users and teams from all over the world on a great variety of fun experiments ranging from physics, chemistry, biology, material science, etc. To learn more about the recent excitement happening at XPP, be sure to look at the Publication section below.

General beamline information can be found at the LCLS website. This website is built and maintained by the research staff of the instrument for documentation and training purposes. We also hope the contents can be useful in getting our new users prepared for their upcoming excitement at XPP.

Useful Links

Official LCLS Schedule webpage: http://www-ssrl.slac.stanford.edu/lcls-resources/schedules

A useful beam schedule distribution portal: http://sites.google.com/site/lclsgateway

Near Experimental Hall, Hutch 3 » complete instrument map

Beamline References on Methods and Instrumentations

• The X-ray Pump-Probe instrument at the Linac Coherent Light Source (M. Chollet, et al., 2015)

• The X-ray Correlation Spectroscopy instrument at the Linac Coherent Light Source (R. Alonso-Mori, et al., 2015)

• Photon-in photon-out hard X-ray spectroscopy at the Linac Coherent Light Source (R. Alonso-Mori, et al., 2015)

• Demonstration of simultaneous experiments using thin crystal multiplexing at the Linac Coherent Light Source (Y. Feng, et al., 2015)

• Focus characterization at an X-ray free-electron laser by coherent scattering and speckle analysis (M. Sikorski, et al., 2015)

• Intensity interferometry measurements with hard x-ray FEL pulses at the Linac Coherent Light Source (S. Song, et al., 2013)

• A single-shot transmissive spectrometer for hard x-ray free electron lasers (D. Zhu, et al., 2012)

Selected Publications

Still being updated ... don't get mad if you don't see your paper 'selected' ... for a more complete list, go to the official LCLS publication webpage here.

2015

• X-ray absorption spectroscopy of iron at multimegabar pressures in laser shock experiments (M. Harmand, et al., Phys.Rev. B)

  • Architecture of the synaptotagmin-SNARE machinery for neuronal exocytosis (Q. Zhou, et al. Nature)

• Three-Dimensional charge density wave order in YBa₂Cu₃O_{6. 67} at high magnetic fields (S. Gerber, et al., Science)

• Imaging molecular motion: femtosecond X-ray scattering of an electrocyclic chemical reaction (M. Minitti, et al., Phys. Rev. Lett)

  • Imaging transient melting of a nanocrystal using an X-ray laser (J. Clark, et al., PNAS)

  • Ultrafast myoglobin structural dynamics observed with an X-ray free electron laser (M. Levantino, et al., Nature Communications).

2014

• Direct characterization of photoinduced lattice dynamics in BaFe₂As₂ (S. Gerber, et al., Nature Communications)

• A time-dependent order parameter for ultrafast photoinduced phase transitions (P. Beaud, et al. Nature Materials)

• Tracking excited-state charge and spin dynamics in iron coordination complexes (W. Zhang, et al. Nature)

  • Goniometer-based femtosecond crystallography with X-ray free electron lasers (A. Cohen, et al., PNAS 111,48)

2013

• Femtosecond X-ray absorption spectroscopy at a hard X-ray free electron laser: application to spin crossover dynamics (H. Lemke, et al., J. Phys. Chem. A)

• Ultrafast Three-Dimensional Imaging of Lattice Dynamics in Individual Gold Nanocrystals (J. Clark, et al., Science)

2012

• Demonstration of self-seeding in a hard-X-ray free-electron laser (J. Amann, et al., Nature Photonics)

• X-ray and optical wave mixing (E. Glover, et al., Nature)

• High contrast x-ray speckle from atomic-scale order in liquids and glasses (S. Hruszkewycz, et al., Phys. Rev. Lett)

back to top