Stanford Synchrotron Radiation Lightsource

Photograph inside the SSRL accelerator ring.
Historic SSRL 1972. First x-ray beamline.

The Stanford Synchrotron Radiation Lightsource (formerly Stanford Synchrotron Radiation Laboratory), a division of SLAC National Accelerator Laboratory, is operated by Stanford University for the Department of Energy. SSRL is a National User Facility which provides synchrotron radiation, a name given to electromagnetic radiation in the x-ray, ultraviolet, visible and infrared realms produced by electrons circulating in a storage ring (Stanford Positron Electron Asymmetric Ring - SPEAR) at nearly the speed of light. The extremely bright light that is produced can be used to investigate various forms of matter ranging from objects of atomic and molecular size to man-made materials with unusual properties. The obtained information and knowledge is of great value to society, with impact in areas such as the environment, future technologies, health, and education.

The SSRL provides experimental facilities to some 2,000 academic and industrial scientists working in such varied fields as drug design, environmental cleanup, electronics, and x-ray imaging. It is located in southern San Mateo County, just outside the city of Menlo Park.


In 1972 the first x-ray beamline was constructed by Ingolf Lindau and Piero Pianetta as literally a "hole in the wall" extending off of the SPEAR storage ring. At that time, the SPEAR had been built in an era of particle colliders, where physicists were more interested in smashing particles together in hope of discovering antimatter then in using x-ray radiation for solid state physics and chemistry. From those meager beginnings the Stanford Synchrotron Radiation Project (SSRP) began. Within a short time SSRP had five experimental hutches sharing the radiation of only a few inches of the curved SPEAR dipole magnets. Each one of those stations was equipped with a monochromator to select the radiation of interest, and experimenters would bring their samples and end stations from all over the world to study the unique effects only achieved through synchrotron radiation. Today the SPEAR storage ring is dedicated completely to the Stanford Synchrotron Radiation Lightsource as part of the SLAC National Accelerator Laboratory facility. SSRL currently operates 24/7 for about nine solid months out of the year; the remaining time is used for major maintenance and upgrades where direct access to the storage ring is needed. There are over 30 unique experimental stations which are made available to users from universities, government labs, and industry from all over the world.


  1. Sebastian Doniach 1973-1977
  2. Arthur Bienenstock 1978-1998
  3. Keith Hodgson 1998-2005
  4. Joachim Stöhr 2005-2009
  5. Piero Pianetta 2009
  6. Chi-Chang Kao 2010-2012
  7. Piero Pianetta 2012-2014
  8. Kelly Gaffney 2014-


listed by Beamline and Station

External links


  1. ^ SSRL Home page
  2. ^ Woods, Heather Rock (September 27, 2005). "Stöhr to Direct Synchrotron Radiation Lab". Press Release. Menlo Park, CA: Stanford Linear Accelerator Center. Retrieved September 28, 2005. 
  3. ^ :Dunn, Lisa (August 2005). "Update on SSRL Beam Lines and Techniques". SSRL Headline News. 6 (2): n.p. 

Coordinates: 37°25′06.2″N 122°12′03.5″W / 37.418389°N 122.200972°W / 37.418389; -122.200972

This article is issued from Wikipedia - version of the 11/18/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.