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FLS 2010 Program


FLS 2010 Workshop Program: Performance Metrics of Future Light Sources – R. Hettel (SLAC)

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Performance Metrics of Future Light Sources – R. Hettel (SLAC)


Panofsky Auditorium

Start Time

3/1/2010 12:00 PM

End Time

3/1/2010 12:30 PM


Capabilities for light sources in the future (but not necessarily from any single source) include: 1) the ability to produce x-ray pulses with Fourier-transform-limit time structure from the picosecond to attosecond regime, integrated and synchronized with conventional lasers, and control of longitudinal pulse shape, amplitude and phase; 2) high or full transverse coherence; 3) high average flux and brightness; 4) energy tunability in soft and hard x-ray regimes, extending to 20 keV; 5) polarization control with up to kHz switching speeds; and 6) high stability. Metrics characterizing source properties include not only average and peak spectral brightness but also the photons per pulse and repetition rate as a function of pulse length, the proximity to transform-limited dimensions in six dimensional phase space, and the less specific but over-arching requirement of maximizing the number of usable photons for experiments of the future, some of which do not require cutting-edge performance capabilities. Sources that will provide these capabilities include linac-based x-ray FELs, very low-emittance storage rings, perhaps ERLs and potentially novel sources that employ advanced acceleration techniques. We conclude in broad terms that two nominal source types will be required in the future: those having the coherence, high peak brightness and pulse length and shape control, represented by linac-based FEL sources, and those having the high repetition rate, stability, and high average but low peak brightness, represented by very low emittance storage rings and ERLs.

All Day Event






Plenary sessions




<div style='border: 1px solid #996600; padding: 5px; margin: 0px; color: #996600;background-color: #ffff99;'>Performance Metrics of Future Light Sources – R. Hettel (SLAC)</div>

Working Group





Future Light Source Metrics - Hettel.pdf    
Content Type: Event
Version: 6.0
Created at 2/6/2010 7:33 AM by Chan, Andrea
Last modified at 3/1/2010 3:00 PM by Chan, Andrea

SLAC SLAC National Accelerator Laboratory, Menlo Park, CA
Operated by Stanford University for the U.S. Dept. of Energy