Gun     Hall    Workers

PEP-X Wants to Hear from You

With input from users, SSRL is developing the scientific case to define how PEP-X will enable the U.S. and international research community to address the grand scientific challenges of the future. You can become a part of this exciting process by sharing your ideas with us. Just contact the following individuals who are leading the brainstorming sessions to help envision future experiments that could be done at PEP-X that now cannot be done elsewhere:

Hard X-rays
Uwe Bergmann (

Soft X-rays
Donghui Lu (

Structural Biology
Hiro Tsuruta (

What is PEP-X?

PEP-X is based on the development of an existing PEP-II storage ring (2.2 km circumference) on the SLAC site into an x-ray source which produces x-rays with an average brightness that exceeds any other storage ring light source, existing or planned, by more than a factor of 10, and SPEAR3 by more than a factor of 1000. PEP-X would create the ultimate synchrotron, capitalizing on existing hardware and infrastructure (high-power radio frequency accelerating system and utilities such as electrical and cooling networks) from the recently decommissioned PEP-II.

A New Era of Synchrotron Science at SLAC: PEP-X

Science at SLAC stands at the edge of an evolutionary leap. After a half-century of high-energy physics, SLAC's scientific focus is shifting, with the decommissioning of the BaBar detector and PEP accelerator and the approaching completion of the Linac Coherent Light Source (LCLS).
Read July 2, 2008 Article in SLAC Today

Ideas for a Future PEP-X Light Source

SLAC is developing a long-range plan to transfer the evolving scientific programs at SSRL from the SPEAR3 light source to a much higher performing synchrotron source - PEP-X - a new storage ring that would occupy the existing PEP-II tunnel and support two experimental halls, each containing 16 x-ray beam lines.
Read Article from European Particle Accelerator Conference