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Plasma lenses, with their extra-large focusing strength, may be a natural complement to high-gradient, plasma-based accelerators. Beam focusing by plasmas has been demonstrated both for electrons and positrons but has not yet achieved the tight beam sizes required for collider applications. Studies of plasma lenses at FACET will explore several potential means to improve performance through tests of lens formation and characteristics.
By tweaking the properties of the electron beam, the plasma, and the environment they sit in—effectively a plasma lens—scientist hope to discover the ultimate limit for how tightly a beam can be focused by a plasma and use that knowledge to design the best possible accelerator.
The combination of a well-characterized high-energy, high-density electron beam, a plasma source, specialized instrumentation, and techniques developed for the plasma acceleration research are critical components to any plasma lens program and make FACET a natural facility for conducting this research.
SLAC National Accelerator Laboratory, Menlo Park, CA
Operated by Stanford University for the U.S. Dept. of Energy