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Comment
. 2001 Jun 5;98(12):6535-6.
doi: 10.1073/pnas.131193598.

Molecular structures from femtosecond x-ray pulses

E E Lattman  1
Affiliations
Comment

Molecular structures from femtosecond x-ray pulses

E E Lattman. Proc Natl Acad Sci U S A. .
No abstract available

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Figures

Figure 1
Figure 1
Schematic diagram of a single-pass free electron laser operating in the Self-Amplified-Spontaneous Emission (SASE) mode. In an XFEL a short, high-energy electron pulse emerging from a linear accelerator is injected into the undulator (Upper). The alternating pattern of N and S magnetic poles in the undulator causes the beam to execute a small amplitude harmonic motion in and out of the plane of the page. This motion represents acceleration of the electrons that causes them to radiate. As the bunch passes down the undulator the interaction of the radiated field with the bunch causes microbunching of the electron pulse (Lower). The electrons in the developing micro bunches eventually radiate coherently, and the number of emitted photons grows exponentially. This is the SASE mode, and it depends critically on the very high instantaneous currents present in the pulses. Note that in reality the number of slices is much larger than shown. [Reproduced with permission from ref. (Copyright 2001, Deutsche Elektronen-Synchrotron).]
See this image and copyright information in PMC

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References

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