The CSPAD megapixel x-ray camera at LCLS

Philip Hart, Sébastien Boutet, Gabriella Carini, Mikhail Dubrovin, Brian Duda, David Fritz, Gunther Haller, Ryan Herbst, Sven Herrmann, Chris Kenney, Nadine Kurita, Henrik Lemke, Marc Messerschmidt, Martin Nordby, Jack Pines, Don Schafer, Matt Swift, Matt Weaver, Garth Williams, Diling ZhuNiels Van Bakel, John Morse

Research output: Chapter in Book/Report/Conference proceedingConference contribution

104 Scopus citations


The Linear Coherent Light Source (LCLS), a free electron laser operating from 250eV to10keV at 120Hz, is opening windows on new science in biology, chemistry, and solid state, atomic, and plasma physics1,2. The FEL provides coherent x-rays in femtosecond pulses of unprecedented intensity. This allows the study of materials on up to 3 orders of magnitude shorter time scales than previously possible. Many experiments at the LCLS require a detector that can image scattered x-rays on a per-shot basis with high efficiency and excellent spatial resolution over a large solid angle and both good S/N (for single-photon counting) and large dynamic range (required for the new coherent x-ray diffractive imaging technique3). The Cornell-SLAC Pixel Array Detector (CSPAD) has been developed to meet these requirements. SLAC has built, characterized, and installed three full camera systems at the CXI and XPP hutches at LCLS. This paper describes the camera system and its characterization and performance.

Original languageEnglish (US)
Title of host publicationX-Ray Free-Electron Lasers
Subtitle of host publicationBeam Diagnostics, Beamline Instrumentation, and Applications
ISBN (Print)9780819492210
StatePublished - Jan 1 2012
Externally publishedYes
EventX-Ray Free-Electron Lasers: Beam Diagnostics, Beamline Instrumentation, and Applications - San Diego, CA, United States
Duration: Aug 13 2012Aug 16 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherX-Ray Free-Electron Lasers: Beam Diagnostics, Beamline Instrumentation, and Applications
Country/TerritoryUnited States
CitySan Diego, CA


  • Free electron laser
  • Hybrid pixel detector
  • Photosynthesis
  • Single-shot structure determination

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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